Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seoul to Southeast Asia from $111

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 18/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — BKK
25 Apr — 2 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seoul to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from Seoul to Southeast Asia
Explore the most affordable flight options available from Seoul to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 March 2026.

Mon 12/1018:00
ICN
-
BKK
Nonstop6h 05m
T'way Air
Wed 14/1000:05
BKK
-
ICN
Nonstop5h 35m
T'way Air
Deal found 23/3$245
Mon 12/1018:00
ICN
-
BKK
Nonstop6h 05m
T'way Air
Thu 15/1000:05
BKK
-
ICN
Nonstop5h 35m
T'way Air
Deal found 25/3$247
Wed 25/319:30
ICN
-
BKK
Nonstop6h 15m
Jeju Air
Mon 1/601:10
BKK
-
ICN
Nonstop5h 45m
Jeju Air
Deal found 23/3$261
Mon 11/517:15
ICN
-
BKK
Nonstop5h 55m
AIR PREMIA
Fri 22/522:45
BKK
-
ICN
Nonstop5h 30m
AIR PREMIA
Deal found 22/3$276
Sat 28/319:50
ICN
-
BKK
Nonstop6h 20m
T'way Air
Sun 19/400:05
BKK
-
ICN
Nonstop5h 35m
T'way Air
Deal found 21/3$277
Sun 27/919:55
ICN
-
BKK
Nonstop5h 50m
Jin Air
Wed 30/900:45
BKK
-
ICN
Nonstop5h 40m
Jin Air
Deal found 23/3$278
Sat 26/919:55
ICN
-
BKK
Nonstop5h 50m
Jin Air
Tue 29/900:45
BKK
-
ICN
Nonstop5h 40m
Jin Air
Deal found 25/3$280
Fri 27/319:30
ICN
-
BKK
Nonstop6h 15m
Jeju Air
Mon 18/501:10
BKK
-
ICN
Nonstop5h 45m
Jeju Air
Deal found 23/3$284
Tue 19/518:00
ICN
-
BKK
Nonstop6h 05m
T'way Air
Thu 21/500:05
BKK
-
ICN
Nonstop5h 35m
T'way Air
Deal found 23/3$286
Tue 19/518:00
ICN
-
BKK
Nonstop6h 05m
T'way Air
Fri 22/500:05
BKK
-
ICN
Nonstop5h 35m
T'way Air
Deal found 21/3$287
Sat 26/919:55
ICN
-
BKK
Nonstop5h 50m
Jin Air
Thu 1/1000:45
BKK
-
ICN
Nonstop5h 40m
Jin Air
Deal found 23/3$289
Sat 26/919:55
ICN
-
BKK
Nonstop5h 50m
Jin Air
Mon 28/900:45
BKK
-
ICN
Nonstop5h 40m
Jin Air
Deal found 24/3$290

Find flight deals from Seoul to Southeast Asia

Keep the following information in mind while searching for Seoul to Southeast Asia flight deals. Data was last updated 26 March 2026.

Round-trip from

$245

One-way from

$111

Popular in

January

Cheapest in

September

Average price

$289
T'way Air
  • T'way Air
  • 21/6-2/7
  • Nonstop
  • 11h 40m total
  • Seoul to Southeast Asia
Search Deals
T'way Air
  • T'way Air
  • 18/7
  • Nonstop
  • 6h 05m total
  • Seoul to Southeast Asia
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($122 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seoul to Southeast Asia 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 647,157 searches. Data last updated 26 March 2026.
Use the filters below to find and compare flights from Seoul to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Sun 12/7

18:00-22:05

Nonstop6h 05m

Bangkok Suvarnabhumi

Wed 22/7

00:05-07:40

Nonstop5h 35m

$306

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Fri 3/7

18:00-22:05

Nonstop6h 05m

Bangkok Suvarnabhumi

Tue 7/7

00:05-07:40

Nonstop5h 35m

$313

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Mon 29/6

19:55-23:45

Nonstop5h 50m

Bangkok Suvarnabhumi

Fri 3/7

00:45-08:25

Nonstop5h 40m

$319

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Mon 8/6

20:05-00:10

Nonstop6h 05m

Bangkok Suvarnabhumi

Tue 9/6

01:10-08:55

Nonstop5h 45m

$329

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Sat 6/6

20:05-00:10

Nonstop6h 05m

Bangkok Suvarnabhumi

Fri 12/6

01:10-08:55

Nonstop5h 45m

$352

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Thu 2/7

18:00-22:05

Nonstop6h 05m

Bangkok Suvarnabhumi

Thu 27/8

00:05-07:40

Nonstop5h 35m

$359

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Sun 28/6

17:15-21:10

Nonstop5h 55m

Bangkok Suvarnabhumi

Sun 5/7

22:45-06:15

Nonstop5h 30m

$370

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Thu 25/6

21:15-01:05

Nonstop5h 50m

Bangkok Suvarnabhumi

Mon 29/6

02:35-10:15

Nonstop5h 40m

$383

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Fri 5/6

20:05-00:10

Nonstop6h 05m

Bangkok Suvarnabhumi

Sat 13/6

01:10-08:55

Nonstop5h 45m

$385

IncheonBangkok

ICN - BKK

ICNBKK

Incheon Intl

Mon 29/6

11:00-23:05

1 stop14h 05m

Bangkok Suvarnabhumi

Mon 6/7

17:15-07:10

1 stop11h 55m

$390

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 47 resultsSorted by cheapest first
1
2
3
...
5

Best time to book a flight from Seoul to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Seoul 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 Seoul to Southeast Asia

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

Currently, October is the cheapest month in which you can book a flight from Seoul to Southeast Asia (average of $116). Flying from Seoul to Southeast Asia in December is currently the most expensive (average of $185). 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 SEL to YJX?

Find hourly flight availability from Seoul to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 March 2026.

A simple way to save on the total cost of your ticket is to fly from Seoul to Southeast Asia in the evening. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight at midday.

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. 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 Southeast Asia. Reviews last updated 26 March 2026.
Read through reviews of airlines operating flights from Seoul to Southeast Asia, such as VietJet 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.
VietJet Air
5.6
Fair
163 reviews
Check prices

Crew

6.6

Overall

5.6

Food

4.7

Boarding

6.0

Comfort

5.3

Entertainment

4.0

Reviews

1 / 6
2.0
Mediocre

Anonymous,Dec 2025

DAD - SGN

Miserable and rude staff. Horrible leg space . It was a night mare . I will never try again
VietJet Air
5.6
Fair
163 reviews
VietJet Air
5.6
Fair
163 reviews
Check prices

Crew

6.6

Overall

5.6

Food

4.7

Boarding

6.0

Comfort

5.3

Entertainment

4.0

Reviews

1 / 6
2.0
Mediocre

Anonymous,Dec 2025

DAD - SGN

Miserable and rude staff. Horrible leg space . It was a night mare . I will never try again

Related info for your journey

Find useful and relevant information for your journey from Seoul to Southeast Asia. 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 Seoul to Southeast Asia?

    There are many flights that can get you from Seoul to Southeast Asia in 5h 55m. Fly via T'way Air, Jeju Air, or AIR PREMIA to get the fastest option. The distance from Seoul to Southeast Asia is about 3663 km. All flights are typically direct.

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

    One-way options have recently been found by users for as low as $78 on Jeju Air. Other airlines that offer cheap prices include Philippines AirAsia from $79 and Cebu Pacific from $93 one-way.

  • What are the most reliable airlines from Seoul to Southeast Asia?

    No one likes to see their flight delayed. When booking a flight from Seoul to Southeast Asia consider choosing AIR PREMIA(96%), Kuwait Airways(96%) or Air Busan(92%), as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seoul to Southeast Asia?

    Looking for the cheapest flight from Seoul to Southeast Asia? While on average our users pay $289, our data indicates the cheapest price to be $78. The most popular route (Incheon Intl - Bangkok Suvarnabhumi), is priced around $986.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seoul 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 Seoul to Southeast Asia?

    Currently, October is the cheapest month in which you can book a flight from Seoul to Southeast Asia (average of $116). Flying from Seoul to Southeast Asia in December is currently the most expensive (average of $185). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Seoul to Southeast Asia

Discover the top airline that operate flights from Seoul to Southeast Asia. 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 647,157 searches. Data last updated 26 March 2026.
AirlineCheapestAverageFlexibilityOn-time
VietJet AirCheapest$259Average$463FlexibilityNo cancel feeOn-timeN/A
Search VietJet Air flights

Fly with Cheapflights

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 Seoul to Southeast Asia?

When you search for this flight from Seoul to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Seoul to Southeast Asia?

Millions of users choose and trust Cheapflights to book the best flight deals from Seoul to Southeast Asia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seoul to Southeast Asia with no change fees?

Yes, we can. To see specific flights from Seoul to Southeast Asia 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 Seoul to Southeast Asia become cheaper?

Yes! Start tracking prices for Seoul to Southeast Asia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.