Cheap flights from Portland to Singapore from S$ 424
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 8-2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
6 Dec — 13 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in September or May, booked 75 days in advance, depart on a Monday or Tuesday and return on a Monday
Cheap flight deals from Portland to Singapore
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Singapore (SIN). 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 6 November 2025.
Explore the most affordable flight options available from Portland to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.
Mon 1-1215:15PDX - SIN
2 stops28h 00mAir Canada
Mon 15-1221:00SIN - PDX
2 stops33h 40mAir Canada
Deal found 4-11S$ 1,175
Sun 7-1209:50PDX - SIN
1 stop29h 10mAir Canada
Sun 14-1221:00SIN - PDX
2 stops37h 30mAir Canada
Deal found 5-11S$ 1,205
Mon 1-1209:50PDX - SIN
3 stops34h 20mMultiple Airlines
Mon 15-1214:10SIN - PDX
3 stops35h 05mMultiple Airlines
Deal found 4-11S$ 1,231
Mon 1-1215:54PDX - SIN
1 stop24h 06mUnited Airlines
Mon 15-1210:10SIN - PDX
1 stop24h 31mUnited Airlines
Deal found 4-11S$ 1,338
Fri 5-1209:50PDX - SIN
2 stops33h 25mMultiple Airlines
Fri 12-1209:30SIN - PDX
2 stops45h 10mMultiple Airlines
Deal found 5-11S$ 1,354
Mon 1-1206:29PDX - SIN
2 stops25h 41mKorean Air
Sun 14-1201:35SIN - PDX
2 stops27h 38mKorean Air
Deal found 4-11S$ 1,376
Fri 5-1206:29PDX - SIN
2 stops30h 56mChina Eastern
Fri 12-1200:25SIN - PDX
2 stops32h 10mChina Eastern
Deal found 3-11S$ 1,397
Fri 5-1206:00PDX - SIN
1 stop22h 15mUnited Airlines
Fri 12-1210:10SIN - PDX
1 stop28h 42mUnited Airlines
Deal found 3-11S$ 1,469
Fri 5-1206:00PDX - SIN
1 stop22h 15mUnited Airlines
Sat 13-1222:20SIN - PDX
2 stops35h 46mUnited Airlines
Deal found 4-11S$ 1,476
Fri 5-1206:29PDX - SIN
2 stops25h 41mKorean Air
Fri 12-1222:30SIN - PDX
2 stops36h 20mKorean Air
Deal found 3-11S$ 1,540
Best flights from Portland to Singapore
Discover carefully curated flight deals from Portland to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 November 2025.
Thu 22-119:00PDX - SIN
1 stop20h 00mAir Canada
Thu 5-208:50SIN - PDX
1 stop21h 50mAir Canada
Deal found 4-11S$ 1,074
Wed 29-407:00PDX - SIN
1 stop21h 10mSingapore Airlines
Wed 13-509:15SIN - PDX
1 stop19h 21mSingapore Airlines
Deal found 5-11S$ 1,077
Thu 15-107:10PDX - SIN
2 stops45h 15mKorean Air
Tue 10-201:35SIN - PDX
2 stops30h 55mKorean Air
Deal found 4-11S$ 1,132
Thu 15-107:45PDX - SIN
1 stop20h 30mUnited Airlines
Wed 11-222:20SIN - PDX
1 stop18h 19mUnited Airlines
Deal found 4-11S$ 1,338
Wed 29-409:40PDX - SIN
2 stops23h 00mKorean Air
Wed 13-507:30SIN - PDX
2 stops20h 47mKorean Air
Deal found 5-11S$ 1,132
Tue 31-306:30PDX - SIN
2 stops31h 30mKorean Air
Wed 15-401:10SIN - PDX
2 stops30h 23mKorean Air
Deal found 6-11S$ 1,132
Mon 1-1207:30PDX - SIN
1 stop20h 45mUnited Airlines
Mon 15-1222:20SIN - PDX
2 stops35h 46mUnited Airlines
Deal found 4-11S$ 1,345
Mon 16-207:10PDX - SIN
2 stops25h 00mKorean Air
Sat 28-201:35SIN - PDX
2 stops33h 15mKorean Air
Deal found 6-11S$ 1,165
Sun 26-409:40PDX - SIN
2 stops23h 00mKorean Air
Fri 8-501:10SIN - PDX
2 stops27h 07mKorean Air
Deal found 4-11S$ 1,321
Tue 10-306:30PDX - SIN
2 stops31h 30mKorean Air
Thu 12-322:30SIN - PDX
2 stops29h 44mKorean Air
Deal found 5-11S$ 1,379
Last-minute flights from Portland to Singapore
Discover last-minute flight deals from Portland to Singapore. Data last updated 6 November 2025 and is based on user searches.
Tue 11-1120:45PDX - SIN
2 stops44h 50mMultiple Airlines
Sat 22-1120:10SIN - PDX
2 stops42h 50mMultiple Airlines
Deal found 5-11S$ 5,695
Tue 11-1112:33PDX - SIN
2 stops32h 32mChina Airlines
Fri 21-1102:00SIN - PDX
2 stops59h 24mChina Airlines
Deal found 4-11S$ 6,744
Tue 11-1110:05PDX - SIN
1 stop42h 10mUnited Airlines
Sat 22-1122:20SIN - PDX
1 stop28h 38mUnited Airlines
Deal found 5-11S$ 12,693
Tue 11-1107:30PDX - SIN
2 stops25h 25mMultiple Airlines
Tue 18-1122:25SIN - PDX
2 stops34h 47mMultiple Airlines
Deal found 4-11S$ 23,793
One-way flights from Portland to Singapore
Search for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated 6 November 2025.
Sun 8-213:38PDX - SIN
2 stops27h 57mMultiple Airlines
Deal found 5-11S$ 424
Fri 6-217:40PDX - SIN
2 stops59h 40mMultiple Airlines
Deal found 5-11S$ 514
Sat 7-217:40PDX - SIN
2 stops59h 40mMultiple Airlines
Deal found 5-11S$ 528
Mon 9-207:00PDX - SIN
2 stops48h 45mMultiple Airlines
Deal found 5-11S$ 553
Wed 11-217:35PDX - SIN
2 stops27h 25mMultiple Airlines
Deal found 5-11S$ 571
Mon 9-221:30PDX - SIN
1 stop28h 15mSingapore Airlines
Deal found 6-11S$ 583
Tue 10-217:51PDX - SIN
2 stops36h 04mMultiple Airlines
Deal found 5-11S$ 618
Thu 5-207:00PDX - SIN
2 stops40h 30mMultiple Airlines
Deal found 5-11S$ 634
Mon 9-209:50PDX - SIN
2 stops23h 05mAir Canada
Deal found 4-11S$ 635
Cheapflights Fare Finder
Customise your flight search to find flights from Portland to Singapore 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 6 November 2025.
Use the filters below to find and compare flights from Portland to Singapore that are best for you.
Fly from
Portland
Fly to
Singapore
Route
Depart
Return
Price
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 22-1
19:00-07:00
1 stop20h 00m
Singapore Changi
Thu 5-2
08:50-14:40
1 stop21h 50m
S$ 1,074
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 29-4
07:00-19:10
1 stop21h 10m
Singapore Changi
Wed 13-5
09:15-13:36
1 stop19h 21m
S$ 1,077
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 15-1
07:10-20:25
2 stops45h 15m
Singapore Changi
Tue 10-2
01:35-16:30
2 stops30h 55m
S$ 1,132
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 29-4
09:40-23:40
2 stops23h 00m
Singapore Changi
Wed 13-5
07:30-13:17
2 stops20h 47m
S$ 1,132
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Tue 31-3
06:30-05:00
2 stops31h 30m
Singapore Changi
Wed 15-4
01:10-16:33
2 stops30h 23m
S$ 1,132
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 16-2
07:10-00:10
2 stops25h 00m
Singapore Changi
Sat 28-2
01:35-18:50
2 stops33h 15m
S$ 1,165
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sun 26-4
09:40-23:40
2 stops23h 00m
Singapore Changi
Fri 8-5
01:10-13:17
2 stops27h 07m
S$ 1,321
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 15-1
07:45-20:15
1 stop20h 30m
Singapore Changi
Wed 11-2
22:20-00:39
1 stop18h 19m
S$ 1,338
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 1-12
07:30-20:15
1 stop20h 45m
Singapore Changi
Mon 15-12
22:20-18:06
2 stops35h 46m
S$ 1,345
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Tue 10-3
06:30-05:00
2 stops31h 30m
Singapore Changi
Thu 12-3
22:30-13:14
2 stops29h 44m
S$ 1,379
Flights are sorted by cheapest return flights first.
Deals found on 5-11
Showing 1-10 of 18 results
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Best time to book a flight from Portland to Singapore
Have a flexible travel schedule? Discover the best time to fly to Singapore from Portland 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 Portland to Singapore
How far ahead should I book a flight from Portland to Singapore?
Use this chart to determine the optimal time to book a return flight from Portland to Singapore. Price data was last updated on 31 October 2025.
To ensure you get the cheapest price possible for a flight from Portland to Singapore, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Portland to Singapore?
Currently, September is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 906). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,098). 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.
Related info for your journey
Find useful and relevant information for your journey from Portland to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
How long is the flight from Portland to Singapore?
There are many flights that can get you from Portland to Singapore in 20h. Fly via Air Canada, Singapore Airlines, or Korean Air to get the fastest option. The distance between Portland and Singapore is about 13073 km. Both multi-stop and direct flights can be found to your destination and back.
Can I find deals for flights from Portland to Singapore that include hotel bookings?
Yes. In addition to deals on Portland to Singapore flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portland to Singapore?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Singapore.
Can I find deals for business class flights from Portland to Singapore?
Yes. Cheapflights offers flight deals from Portland to Singapore 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 Portland to Singapore?
Currently, September is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 906). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,098). 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.
Explore flights to Singapore departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 6 November 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 Portland to Singapore?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Singapore from Portland today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Portland to Singapore?
Cheapflights helps you find that perfect flight to Singapore from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Portland to Singapore with no change fees?
Yes, we can. To see specific flights from Portland to Singapore with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Portland to Singapore become cheaper?
Not ready to book yet? You can track prices for flights from Portland to Singapore on Cheapflights with our Price Alert feature and get notified when better prices are available.
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