Cheap flights from Singapore to Surabaya from S$ 113
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23-7. Fares are subject to change and may not be available on all flights or dates of travel.
SIN — SUB
9 Jul — 16 Jul1
Return
1 adult
Economy
Cheapflights Tip: The best prices from Singapore Changi to Surabaya Juanda are usually found in November or March, booked 88 days in advance, depart on a Monday or Tuesday and return on a Friday
Cheap flight deals from Singapore to Surabaya
Discover tips and strategies to find the most affordable flight options for your journey from Singapore (SIN) to Surabaya (SUB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 July 2025.
Explore the most affordable flight options available from Singapore to Surabaya. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Thu 17-712:45SIN - SUB
Nonstop2h 15mJetstar Asia
Sun 20-714:40SUB - SIN
Nonstop2h 20mJetstar Asia
Deal found 3-7S$ 185
Tue 29-712:45SIN - SUB
Nonstop2h 15mMultiple Airlines
Tue 5-819:35SUB - SIN
Nonstop2h 20mMultiple Airlines
Deal found 1-7S$ 191
Mon 22-914:20SIN - SUB
Nonstop2h 20mSingapore Airlines
Tue 30-910:10SUB - SIN
Nonstop2h 20mSingapore Airlines
Deal found 2-7S$ 208
Fri 31-1007:30SIN - SUB
Nonstop2h 30mScoot
Sun 2-1119:40SUB - SIN
Nonstop2h 20mScoot
Deal found 30-6S$ 209
Wed 27-810:10SIN - SUB
1 stop9h 25mCitilink
Sat 30-805:55SUB - SIN
1 stop13h 05mCitilink
Deal found 1-7S$ 264
Fri 1-819:00SIN - SUB
Nonstop2h 30mGaruda Indonesia
Mon 4-807:05SUB - SIN
Nonstop2h 20mGaruda Indonesia
Deal found 1-7S$ 265
Best flights from Singapore to Surabaya
Discover carefully curated flight deals from Singapore to Surabaya that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 July 2025.
Thu 17-712:45SIN - SUB
Nonstop2h 15mJetstar Asia
Sun 20-714:40SUB - SIN
Nonstop2h 20mJetstar Asia
Deal found 3-7S$ 185
Tue 29-712:45SIN - SUB
Nonstop2h 15mMultiple Airlines
Tue 5-819:35SUB - SIN
Nonstop2h 20mMultiple Airlines
Deal found 1-7S$ 191
Mon 22-914:20SIN - SUB
Nonstop2h 20mSingapore Airlines
Tue 30-910:10SUB - SIN
Nonstop2h 20mSingapore Airlines
Deal found 2-7S$ 208
Fri 31-1007:30SIN - SUB
Nonstop2h 30mScoot
Sun 2-1119:40SUB - SIN
Nonstop2h 20mScoot
Deal found 30-6S$ 209
Wed 27-810:10SIN - SUB
1 stop9h 25mCitilink
Sat 30-805:55SUB - SIN
1 stop13h 05mCitilink
Deal found 1-7S$ 264
Fri 1-819:00SIN - SUB
Nonstop2h 30mGaruda Indonesia
Mon 4-807:05SUB - SIN
Nonstop2h 20mGaruda Indonesia
Deal found 1-7S$ 265
Direct flights from Singapore to Surabaya
Explore direct flight options from Singapore to Surabaya based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 July 2025.
Thu 17-712:45SIN - SUB
Nonstop2h 15mJetstar Asia
Sun 20-714:40SUB - SIN
Nonstop2h 20mJetstar Asia
Deal found 3-7S$ 185
Tue 29-712:45SIN - SUB
Nonstop2h 15mMultiple Airlines
Tue 5-819:35SUB - SIN
Nonstop2h 20mMultiple Airlines
Deal found 1-7S$ 191
Mon 22-914:20SIN - SUB
Nonstop2h 20mSingapore Airlines
Tue 30-910:10SUB - SIN
Nonstop2h 20mSingapore Airlines
Deal found 2-7S$ 208
Fri 31-1007:30SIN - SUB
Nonstop2h 30mScoot
Sun 2-1119:40SUB - SIN
Nonstop2h 20mScoot
Deal found 30-6S$ 209
Fri 1-819:00SIN - SUB
Nonstop2h 30mGaruda Indonesia
Mon 4-807:05SUB - SIN
Nonstop2h 20mGaruda Indonesia
Deal found 1-7S$ 265
Last-minute flights from Singapore to Surabaya
Discover last-minute flight deals from Singapore to Surabaya. Data last updated 4 July 2025 and is based on user searches.
Wed 9-701:50SIN - SUB
1 stop17h 10mCathay Pacific
Sun 13-708:20SUB - SIN
1 stop11h 15mCathay Pacific
Deal found 2-7S$ 7,454
Thu 10-709:35SIN - SUB
1 stop10h 35mGaruda Indonesia
Sun 13-720:05SUB - SIN
2 stops20h 55mGaruda Indonesia
Deal found 2-7S$ 712
Thu 10-710:20SIN - SUB
2 stops20h 45mMultiple Airlines
Sat 12-707:00SUB - SIN
1 stop13h 15mMultiple Airlines
Deal found 2-7S$ 755
Fri 11-721:20SIN - SUB
1 stop9h 45mBatik Air
Mon 14-720:30SUB - SIN
1 stop13h 00mBatik Air
Deal found 2-7S$ 471
Thu 17-712:45SIN - SUB
Nonstop2h 15mJetstar Asia
Sun 20-714:40SUB - SIN
Nonstop2h 20mJetstar Asia
Deal found 3-7S$ 185
Tue 29-712:45SIN - SUB
Nonstop2h 15mMultiple Airlines
Tue 5-819:35SUB - SIN
Nonstop2h 20mMultiple Airlines
Deal found 1-7S$ 191
Fri 1-819:00SIN - SUB
Nonstop2h 30mGaruda Indonesia
Mon 4-807:05SUB - SIN
Nonstop2h 20mGaruda Indonesia
Deal found 1-7S$ 265
Fri 15-817:25SIN - SUB
Nonstop2h 10mScoot
Fri 22-819:35SUB - SIN
Nonstop2h 20mScoot
Deal found 1-7S$ 255
Thu 21-807:50SIN - SUB
Nonstop2h 15mSingapore Airlines
Tue 16-910:10SUB - SIN
Nonstop2h 20mSingapore Airlines
Deal found 2-7S$ 214
Wed 27-810:10SIN - SUB
1 stop9h 25mCitilink
Sat 30-805:55SUB - SIN
1 stop13h 05mCitilink
Deal found 1-7S$ 264
One-way flights from Singapore to Surabaya
Search for one-way flight options from Singapore to Surabaya. Find affordable one-way fares based on user searches. Data last updated 4 July 2025.
Wed 23-712:45SIN - SUB
Nonstop2h 15mJetstar Asia
Deal found 1-7S$ 113
Fri 19-1207:30SIN - SUB
Nonstop2h 30mScoot
Deal found 2-7S$ 139
Tue 12-810:10SIN - SUB
1 stop9h 25mCitilink
Deal found 30-6S$ 143
Mon 21-710:20SIN - SUB
1 stop9h 30mMultiple Airlines
Deal found 1-7S$ 164
Tue 5-819:00SIN - SUB
Nonstop2h 30mGaruda Indonesia
Deal found 3-7S$ 168
Fri 19-1214:40SIN - SUB
1 stop20h 20mBatik Air
Deal found 3-7S$ 183
Sun 10-800:05SIN - SUB
1 stop20h 00mBatik Air
Deal found 3-7S$ 205
Cheapflights Fare Finder
Customise your flight search to find flights from Singapore to Surabaya that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 200,618 searches. Data last updated 4 July 2025.
Use the filters below to find and compare flights from Singapore to Surabaya that are best for you.
Fly from
Singapore
Fly to
Surabaya
Route
Depart
Return
Price
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Thu 17-7
12:45-14:00
Nonstop2h 15m
Surabaya Juanda
Sun 20-7
14:40-18:00
Nonstop2h 20m
S$ 185
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Mon 22-9
14:20-15:40
Nonstop2h 20m
Surabaya Juanda
Tue 30-9
10:10-13:30
Nonstop2h 20m
S$ 208
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Tue 19-8
10:10-18:35
1 stop9h 25m
Surabaya Juanda
Tue 26-8
19:35-22:55
Nonstop2h 20m
S$ 231
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Wed 27-8
10:10-18:35
1 stop9h 25m
Surabaya Juanda
Sat 30-8
05:55-20:00
1 stop13h 05m
S$ 264
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Fri 1-8
19:00-20:30
Nonstop2h 30m
Surabaya Juanda
Mon 4-8
07:05-10:25
Nonstop2h 20m
S$ 265
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Fri 18-7
17:25-18:35
Nonstop2h 10m
Surabaya Juanda
Tue 22-7
19:35-22:55
Nonstop2h 20m
S$ 269
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Mon 28-7
12:45-14:00
Nonstop2h 15m
S$ 113
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Fri 19-12
07:30-09:00
Nonstop2h 30m
S$ 139
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Tue 30-9
10:10-18:35
1 stop9h 25m
S$ 144
SingaporeSurabaya
SIN - SUB
SINSUB
Singapore Changi
Tue 5-8
19:00-20:30
Nonstop2h 30m
S$ 168
Flights are sorted by cheapest return flights first.
Deals found on 2-7
Showing 1-10 of 13 results
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Best time to book a flight from Singapore to Surabaya
Have a flexible travel schedule? Discover the best time to fly to Surabaya from Singapore with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Singapore to Surabaya
How far ahead should I book a flight from Singapore to Surabaya?
Use this chart to determine the optimal time to book a return flight from Singapore to Surabaya. Price data was last updated on 27 June 2025.
Booking 88 days in advance of your planned departure date is, on average, the best time to get cheap flights from Singapore to Surabaya. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Singapore to Surabaya?
Currently, February is the cheapest month in which you can book a flight from Singapore to Surabaya (average of S$ 129). Flying from Singapore to Surabaya in December is currently the most expensive (average of S$ 196). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SIN to SUB?
Find hourly flight availability from Singapore to Surabaya. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.
When flying from Singapore to Surabaya, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 23% versus a flight in the evening.
What is the cheapest day to fly from Singapore to Surabaya?
Use this chart to determine the cheapest time to fly return from Singapore to Surabaya. Price data was last updated on 29 June 2025.
Travellers seeking maximum savings on their Singapore to Surabaya flight should consider departing on Sunday at midday when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Singapore to Surabaya
Explore weekly flight availability from Singapore to Surabaya. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 July 2025.
The most flights from SIN to SUB are scheduled on a Tuesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).
How much does it cost for a return flight from Singapore to Surabaya?
Reviews of airlines servicing Surabaya
Get insights into the airlines that provide service to Surabaya. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Surabaya. Reviews last updated 4 July 2025.
Read through reviews of airlines operating flights from Singapore to Surabaya, such as Garuda Indonesia, Singapore Airlines, andJetstar Asia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
I had a pleasant experience with the cabin staff, who were attentive, friendly, and accommodating throughout the flight. Their professionalism made the journey more comfortable. The food and beverage were well-presented, and delicious, perfectly meeting my expectations. I appreciated that the airline accommodated dietary preferences (Seafood Meal), which enhanced my overall experience. I am writing this feedback on behalf of my friends and family who traveled in the economy class. We strongly believe that there is a splendid opportunity to further enrich the economy class experience by introducing a new feature for purchase, drawing inspiration from your existing product, 'Garuda Priority Service.' 1. Enhanced Meal Options Introduce a premium meal selection for purchase in the economy class. This would allow economy class passengers to relish business class meals. Providing the option to savor premium meals would undoubtedly elevate the travel experience for passengers. 2. Upgraded Amenity Kits Offer economy class passengers the opportunity to purchase enhanced amenity kits, inclusive of noise-canceling headphones and other amenities akin to those provided in the business class. The provision of these upgraded amenity kits would significantly enhance the in-flight comfort and overall experience for economy class travelers. 3. Displaying the menu on the in-flight entertainment screen would be helpful. 4. Implementing a system similar to Tapendium, where passengers can order snacks, beverages, and other items directly from the in-flight entertainment screen, would further enhance the passenger experience.
I had a pleasant experience with the cabin staff, who were attentive, friendly, and accommodating throughout the flight. Their professionalism made the journey more comfortable. The food and beverage were well-presented, and delicious, perfectly meeting my expectations. I appreciated that the airline accommodated dietary preferences (Seafood Meal), which enhanced my overall experience. I am writing this feedback on behalf of my friends and family who traveled in the economy class. We strongly believe that there is a splendid opportunity to further enrich the economy class experience by introducing a new feature for purchase, drawing inspiration from your existing product, 'Garuda Priority Service.' 1. Enhanced Meal Options Introduce a premium meal selection for purchase in the economy class. This would allow economy class passengers to relish business class meals. Providing the option to savor premium meals would undoubtedly elevate the travel experience for passengers. 2. Upgraded Amenity Kits Offer economy class passengers the opportunity to purchase enhanced amenity kits, inclusive of noise-canceling headphones and other amenities akin to those provided in the business class. The provision of these upgraded amenity kits would significantly enhance the in-flight comfort and overall experience for economy class travelers. 3. Displaying the menu on the in-flight entertainment screen would be helpful. 4. Implementing a system similar to Tapendium, where passengers can order snacks, beverages, and other items directly from the in-flight entertainment screen, would further enhance the passenger experience.
I had a pleasant experience with the cabin staff, who were attentive, friendly, and accommodating throughout the flight. Their professionalism made the journey more comfortable. The food and beverage were well-presented, and delicious, perfectly meeting my expectations. I appreciated that the airline accommodated dietary preferences (Seafood Meal), which enhanced my overall experience. I am writing this feedback on behalf of my friends and family who traveled in the economy class. We strongly believe that there is a splendid opportunity to further enrich the economy class experience by introducing a new feature for purchase, drawing inspiration from your existing product, 'Garuda Priority Service.' 1. Enhanced Meal Options Introduce a premium meal selection for purchase in the economy class. This would allow economy class passengers to relish business class meals. Providing the option to savor premium meals would undoubtedly elevate the travel experience for passengers. 2. Upgraded Amenity Kits Offer economy class passengers the opportunity to purchase enhanced amenity kits, inclusive of noise-canceling headphones and other amenities akin to those provided in the business class. The provision of these upgraded amenity kits would significantly enhance the in-flight comfort and overall experience for economy class travelers. 3. Displaying the menu on the in-flight entertainment screen would be helpful. 4. Implementing a system similar to Tapendium, where passengers can order snacks, beverages, and other items directly from the in-flight entertainment screen, would further enhance the passenger experience.
I had a pleasant experience with the cabin staff, who were attentive, friendly, and accommodating throughout the flight. Their professionalism made the journey more comfortable. The food and beverage were well-presented, and delicious, perfectly meeting my expectations. I appreciated that the airline accommodated dietary preferences (Seafood Meal), which enhanced my overall experience. I am writing this feedback on behalf of my friends and family who traveled in the economy class. We strongly believe that there is a splendid opportunity to further enrich the economy class experience by introducing a new feature for purchase, drawing inspiration from your existing product, 'Garuda Priority Service.' 1. Enhanced Meal Options Introduce a premium meal selection for purchase in the economy class. This would allow economy class passengers to relish business class meals. Providing the option to savor premium meals would undoubtedly elevate the travel experience for passengers. 2. Upgraded Amenity Kits Offer economy class passengers the opportunity to purchase enhanced amenity kits, inclusive of noise-canceling headphones and other amenities akin to those provided in the business class. The provision of these upgraded amenity kits would significantly enhance the in-flight comfort and overall experience for economy class travelers. 3. Displaying the menu on the in-flight entertainment screen would be helpful. 4. Implementing a system similar to Tapendium, where passengers can order snacks, beverages, and other items directly from the in-flight entertainment screen, would further enhance the passenger experience.
I had a pleasant experience with the cabin staff, who were attentive, friendly, and accommodating throughout the flight. Their professionalism made the journey more comfortable. The food and beverage were well-presented, and delicious, perfectly meeting my expectations. I appreciated that the airline accommodated dietary preferences (Seafood Meal), which enhanced my overall experience. I am writing this feedback on behalf of my friends and family who traveled in the economy class. We strongly believe that there is a splendid opportunity to further enrich the economy class experience by introducing a new feature for purchase, drawing inspiration from your existing product, 'Garuda Priority Service.' 1. Enhanced Meal Options Introduce a premium meal selection for purchase in the economy class. This would allow economy class passengers to relish business class meals. Providing the option to savor premium meals would undoubtedly elevate the travel experience for passengers. 2. Upgraded Amenity Kits Offer economy class passengers the opportunity to purchase enhanced amenity kits, inclusive of noise-canceling headphones and other amenities akin to those provided in the business class. The provision of these upgraded amenity kits would significantly enhance the in-flight comfort and overall experience for economy class travelers. 3. Displaying the menu on the in-flight entertainment screen would be helpful. 4. Implementing a system similar to Tapendium, where passengers can order snacks, beverages, and other items directly from the in-flight entertainment screen, would further enhance the passenger experience.
I had a pleasant experience with the cabin staff, who were attentive, friendly, and accommodating throughout the flight. Their professionalism made the journey more comfortable. The food and beverage were well-presented, and delicious, perfectly meeting my expectations. I appreciated that the airline accommodated dietary preferences (Seafood Meal), which enhanced my overall experience. I am writing this feedback on behalf of my friends and family who traveled in the economy class. We strongly believe that there is a splendid opportunity to further enrich the economy class experience by introducing a new feature for purchase, drawing inspiration from your existing product, 'Garuda Priority Service.' 1. Enhanced Meal Options Introduce a premium meal selection for purchase in the economy class. This would allow economy class passengers to relish business class meals. Providing the option to savor premium meals would undoubtedly elevate the travel experience for passengers. 2. Upgraded Amenity Kits Offer economy class passengers the opportunity to purchase enhanced amenity kits, inclusive of noise-canceling headphones and other amenities akin to those provided in the business class. The provision of these upgraded amenity kits would significantly enhance the in-flight comfort and overall experience for economy class travelers. 3. Displaying the menu on the in-flight entertainment screen would be helpful. 4. Implementing a system similar to Tapendium, where passengers can order snacks, beverages, and other items directly from the in-flight entertainment screen, would further enhance the passenger experience.
Related info for your journey
Find useful and relevant information for your journey from Singapore to Surabaya. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airports do I use to fly from Singapore to Surabaya?
If you wish to fly to Surabaya from Singapore, then you need to book flights from Singapore Changi to Surabaya Juanda. There are 24 flights from Changi (SIN) to Juanda (SUB) per day to choose from. Flights to Surabaya from Changi are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 2h 15m is how long a nonstop flight from Singapore to Surabaya Juanda typically takes.
How popular is this Singapore to Surabaya flight route?
Flights from Singapore Changi to Surabaya Juanda have been viewed 3,900 times in the past calendar month.
What are the cheapest airlines flying from Singapore to Surabaya round-trip?
According to our current data, Jetstar Asia (S$ 185), Singapore Airlines (S$ 208), and Scoot (S$ 209) offers the cheapest pricing from Singapore to Surabaya. You may be able to fly from Singapore to Surabaya for 20% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Singapore to Surabaya one-way?
To fly one-way, consider booking your trip with Jetstar Asia, which is currently one of the cheapest options available, starting at S$ 113. Scoot flights start at S$ 139 while deals on Citilink start at S$ 143 one-way.
What are the most reliable airlines from Singapore to Surabaya?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Singapore to Surabaya on time: Qantas Airways (91%), Finnair (91%), Jetstar Asia (91%).
What are the cheapest flights from Singapore to Surabaya?
While on average a flight from Singapore to Surabaya is generally S$ 215, our data shows the cheapest flight currently is S$ 123. When looking at the most popular route, (Singapore Changi - Surabaya Juanda), you can expect to pay S$ 190 for that flight.
Can I find deals for business class flights from Singapore to Surabaya?
Yes. Cheapflights offers flight deals from Singapore to Surabaya by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Singapore to Surabaya?
Currently, February is the cheapest month in which you can book a flight from Singapore to Surabaya (average of S$ 129). Flying from Singapore to Surabaya in December is currently the most expensive (average of S$ 196). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Fly from Singapore to Surabaya on these airlines
Choose from the following airlines for your flight from Singapore to Surabaya. Flights are based on user searches made on Cheapflights and were last updated on 4 July 2025.
Explore flights to Surabaya departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 4 July 2025.
Discover the top 5 airlines that operate flights from Singapore to Surabaya. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 200,618 searches. Data last updated 4 July 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Singapore to Surabaya?
Cheapflights helps you search for flights from Singapore to Surabaya via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Singapore to Surabaya?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Singapore to Surabaya.
Can Cheapflights find flights from Singapore to Surabaya with no change fees?
Yes! Cheapflights helps users easily find flights from Singapore to Surabaya with no change fees.
Can Cheapflights notify me if prices for flights from Singapore to Surabaya become cheaper?
Of course! You can now track prices for flights from Singapore to Surabaya and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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