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Cheap flights from South Korea to Southeast Asia from S$ 118

ICN — BKK
7 Oct — 14 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from South Korea to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from South Korea to Southeast Asia

Thu 17-917:40 -
Nonstop6h 45m
Sun 20-900:25 -
Nonstop6h 45m
Deal found 3-9S$ 284
Fri 4-917:40 -
Nonstop6h 45m
Mon 7-900:25 -
Nonstop6h 45m
Deal found 3-9S$ 286
Thu 10-917:40 -
Nonstop6h 45m
Sun 13-900:25 -
Nonstop6h 45m
Deal found 7-9S$ 291
Fri 2-1017:40 -
Nonstop6h 45m
Sat 3-1000:25 -
Nonstop6h 45m
Deal found 3-9S$ 294
Thu 1-1017:40 -
Nonstop6h 45m
Fri 2-1000:25 -
Nonstop6h 45m
Deal found 6-9S$ 296
Sat 19-917:40 -
Nonstop6h 45m
Tue 22-900:25 -
Nonstop6h 45m
Deal found 5-9S$ 304
Sat 5-917:40 -
Nonstop6h 45m
Tue 8-900:25 -
Nonstop6h 45m
Deal found 4-9S$ 308
Tue 8-917:40 -
Nonstop6h 45m
Sun 13-900:25 -
Nonstop6h 45m
Deal found 3-9S$ 310
Fri 18-917:40 -
Nonstop6h 45m
Tue 22-900:25 -
Nonstop6h 45m
Deal found 6-9S$ 312
Mon 14-911:00 -
Nonstop6h 25m
Sat 19-902:15 -
Nonstop6h 30m
Deal found 4-9S$ 323
Tue 15-909:30 -
Nonstop6h 05m
Tue 15-902:15 -
Nonstop6h 00m
Deal found 2-9S$ 323
Sun 13-918:10 -
Nonstop6h 30m
Mon 14-923:00 -
Nonstop6h 45m
Deal found 4-9S$ 324

Find flight deals from South Korea to Southeast Asia

Round-trip from

S$ 284

One-way from

S$ 118

Popular in

July

Cheapest in

March

Average price

S$ 256
Jeju Air
  • Jeju Air
  • 17-9-20-9
  • Nonstop
  • 13h 30m total
  • South Korea to Southeast Asia
Search Deals
Jeju Air
  • Jeju Air
  • 26-9-31-12
  • Nonstop
  • 6h 45m total
  • South Korea to Southeast Asia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (S$ 55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (S$ 10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from South Korea to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BusanSingapore

PUS Busan Gimhae - SIN Singapore Changi

PUSSIN

Busan Gimhae

Fri 18-9

17:40-23:25

Nonstop6h 45m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 122

IncheonSingapore

ICN Incheon Intl - SIN Singapore Changi

ICNSIN

Incheon Intl

Sat 12-9

18:10-23:40

Nonstop6h 30m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 128

BusanSingapore

PUS Busan Gimhae - SIN Singapore Changi

PUSSIN

Busan Gimhae

Fri 2-10

17:40-23:25

Nonstop6h 45m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 133

BusanSingapore

PUS Busan Gimhae - SIN Singapore Changi

PUSSIN

Busan Gimhae

Tue 15-9

17:40-23:25

Nonstop6h 45m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 142

IncheonSingapore

ICN Incheon Intl - SIN Singapore Changi

ICNSIN

Incheon Intl

Fri 18-9

15:50-21:30

Nonstop6h 40m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 155
Fastest return journey

Jeju CitySingapore

CJU Jeju City - SIN Singapore Changi

CJUSIN

Jeju City

Thu 1-10

19:40-00:45

Nonstop6h 05m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 155

Jeju CitySingapore

CJU Jeju City - SIN Singapore Changi

CJUSIN

Jeju City

Thu 15-10

19:40-00:45

Nonstop6h 05m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 155

Jeju CitySingapore

CJU Jeju City - SIN Singapore Changi

CJUSIN

Jeju City

Thu 10-9

13:00-23:25

1 stop11h 25m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 155

IncheonSingapore

ICN Incheon Intl - SIN Singapore Changi

ICNSIN

Incheon Intl

Thu 17-9

15:50-21:30

Nonstop6h 40m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 156

BusanSingapore

PUS Busan Gimhae - SIN Singapore Changi

PUSSIN

Busan Gimhae

Mon 5-10

17:40-23:25

Nonstop6h 45m

Singapore Changi

Wed 31-12

00:00-01:30

Nonstop0h 00m

S$ 165

Flights are sorted by cheapest return flights first.

Deals found on 4-9

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from South Korea to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from South Korea with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from South Korea to Southeast Asia

What is the cheapest month to book a flight from South Korea to Southeast Asia?

Currently, September is the cheapest month in which you can book a flight from South Korea to Southeast Asia (average of S$ 277). Flying from South Korea to Southeast Asia in July is currently the most expensive (average of S$ 401). 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 KR to YJX?

It’s typically best to fly out from South Korea to Southeast Asia in the morning. Doing so could potentially save you 18% on the flight price compared to flying in the evening, which is usually more expensive.

Weekly flight availability from South Korea to Southeast Asia

The most flights from KR0 to zzYJX are scheduled on a Thursday (48 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (41 on average).

How far ahead should I book a flight from South Korea to Southeast Asia?

The price you pay for your flight from South Korea to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from South Korea to Southeast Asia?

Travellers seeking maximum savings on their South Korea to Southeast Asia flight should consider departing on Sunday mornings when fares are most often at their lowest. Tuesday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Southeast Asia

Read through reviews of airlines operating flights from South Korea to Southeast Asia, such as Korean Air,Singapore Airlines, andJeju Air. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very Good
1,221 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Singapore Airlines
8.2
Very Good
1,598 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Jeju Air
7.6
Good
38 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Scoot
6.7
Okay
331 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

  • How long is the flight from South Korea to Southeast Asia?

    For as low as S$ 342, Jeju Air can have you in Southeast Asia from South Korea in 6h 30m. There are 4622 km between South Korea and Southeast Asia. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from South Korea to Southeast Asia one-way?

    For one-way options, check prices for Jeju Air. According to our data, you can fly for as low as S$ 75. Users have also found prices from S$ 82 and S$ 84 on Vietnam Airlines and T'way Air, respectively.

  • Can I find deals for flights from South Korea to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on South Korea to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from South Korea to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Korea to Southeast Asia.

  • Can I find deals for business class flights from South Korea to Southeast Asia?

    Yes. Cheapflights offers flight deals from South Korea to Southeast Asia 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 South Korea to Southeast Asia?

    Currently, September is the cheapest month in which you can book a flight from South Korea to Southeast Asia (average of S$ 277). Flying from South Korea to Southeast Asia in July is currently the most expensive (average of S$ 401). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from South Korea to Southeast Asia

AirlineCheapestAverageFlexibilityOn-time
Jeju AirCheapestS$ 263AverageS$ 480FlexibilityNo cancel feeOn-timeN/A
Search Jeju Air flights
T'way AirCheapestS$ 270AverageS$ 511FlexibilityNo cancel feeOn-time88%
Search T'way Air flights
Korean AirCheapestS$ 321AverageS$ 809FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ScootCheapestS$ 380AverageS$ 670FlexibilityNo cancel feeOn-timeN/A
Search Scoot flights
Singapore AirlinesCheapestS$ 382AverageS$ 485FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights

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