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$1,213+ Cheap flights from St. Louis (STL) to Busan (PUS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PUS
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap flight deals from St. Louis to Busan

Cheapest flights from St. Louis to Busan
Explore the most affordable flight options available from St. Louis to Busan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2026.

This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:35 am
STL
-
PUS
2 stops34h 35m
Delta
Sun 2/2210:25 am
PUS
-
STL
2 stops28h 11m
Delta
Deal found 1/18$1,213
This Korean Air deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/216:00 am
STL
-
PUS
2 stops23h 45m
Korean Air
Sun 1/2510:25 am
PUS
-
STL
2 stops28h 12m
Korean Air
Deal found 1/19$1,218
This Korean Air deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/226:10 am
STL
-
PUS
2 stops23h 35m
Korean Air
Mon 1/267:00 am
PUS
-
STL
2 stops31h 37m
Korean Air
Deal found 1/18$1,255
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:20 am
STL
-
PUS
2 stops22h 15m
Delta
Wed 5/278:00 am
PUS
-
STL
2 stops19h 17m
Delta
Deal found 1/18$1,610
This oojo deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:56 pm
STL
-
PUS
2 stops32h 04m
EVA Air
Sat 5/307:10 pm
PUS
-
STL
2 stops42h 47m
EVA Air
Deal found 1/18$1,807
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:30 am
STL
-
PUS
2 stops23h 05m
Delta
Fri 5/294:30 pm
PUS
-
STL
2 stops20h 31m
Delta
Deal found 1/18$1,875
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:30 am
STL
-
PUS
2 stops23h 05m
Delta
Thu 5/284:30 pm
PUS
-
STL
2 stops20h 31m
Delta
Deal found 1/18$1,918
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:30 am
STL
-
PUS
2 stops20h 50m
Delta
Mon 6/110:40 am
PUS
-
STL
2 stops27h 56m
Delta
Deal found 1/18$2,005
This Korean Air deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/241:30 pm
STL
-
PUS
2 stops28h 15m
Korean Air
Sat 5/304:30 pm
PUS
-
STL
2 stops34h 24m
Korean Air
Deal found 1/18$2,010
This Delta deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 am
STL
-
PUS
2 stops22h 20m
Delta
Fri 5/294:30 pm
PUS
-
STL
2 stops21h 08m
Delta
Deal found 1/18$2,015

Find flight deals from St. Louis to Busan

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Busan (PUS). 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 January 20, 2026.

Round-trip from

$1,213
(Delta)
From Lambert-St Louis to Busan Gimhae
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Busan 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 2,558,603 searches. Data last updated January 20, 2026.
Use the filters below to find and compare flights from St. Louis to Busan that are best for you.

Fly from

St. Louis

Fly to

Busan

Route

Depart

Return

Price

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Wed 2/25

6:35 am-8:10 am

2 stops34h 35m

Busan Gimhae

Sun 3/1

7:55 am-8:41 pm

2 stops27h 46m

$1,213

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Wed 2/18

6:35 am-8:10 am

2 stops34h 35m

Busan Gimhae

Sun 2/22

10:25 am-11:36 pm

2 stops28h 11m

$1,213

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Tue 5/19

7:20 am-7:35 pm

2 stops22h 15m

Busan Gimhae

Wed 5/27

8:00 am-1:17 pm

2 stops19h 17m

$1,610

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Tue 5/19

9:00 am-8:45 pm

2 stops21h 45m

Busan Gimhae

Sat 5/30

7:00 am-9:06 pm

2 stops28h 06m

$1,610

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Tue 5/19

7:20 am-6:20 pm

2 stops21h 00m

Busan Gimhae

Mon 6/1

10:40 am-12:36 am

2 stops27h 56m

$1,610

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Wed 5/20

6:00 am-6:20 pm

2 stops22h 20m

Busan Gimhae

Thu 5/28

4:30 pm-11:38 pm

2 stops21h 08m

$1,610

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Tue 5/19

9:00 am-8:45 pm

2 stops21h 45m

Busan Gimhae

Tue 6/2

10:40 am-11:38 pm

2 stops26h 58m

$1,610

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Wed 5/20

7:20 am-6:20 pm

2 stops21h 00m

Busan Gimhae

Wed 5/27

4:30 pm-12:36 am

2 stops22h 06m

$1,610

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Thu 5/21

6:45 am-7:35 pm

2 stops22h 50m

Busan Gimhae

Wed 5/27

8:00 am-1:17 pm

2 stops19h 17m

$1,875

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Mon 5/25

6:30 am-7:35 pm

2 stops23h 05m

Busan Gimhae

Fri 5/29

4:30 pm-11:01 pm

2 stops20h 31m

$1,875

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 12 results
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Best time to book a flight from St. Louis to Busan

Have a flexible travel schedule? Discover the best time to fly to Busan from St. Louis with our price prediction graph.
Estimated round-trip 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Busan. 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 St. Louis to Busan?

    Delta can get you from St. Louis to Busan in just under 34h 35m. Your travel time can differ by up to . The distance from St. Louis to Busan is about 6740 mi.

  • Can I find deals for flights from St. Louis to Busan that include hotel bookings?

    Yes. In addition to deals on St. Louis to Busan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Busan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Busan.

  • Can I find deals for business class flights from St. Louis to Busan?

    Yes. Cheapflights offers flight deals from St. Louis to Busan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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