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$1,214+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PUS
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
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Cheap flight deals from St. Louis to Busan

Best flights from St. Louis to Busan
Discover carefully curated flight deals from St. Louis to Busan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 3, 2025.

This Delta deal was found by Cheapflights users on 12/1. 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.
Sun 2/155:00 pmSTL - PUS
2 stops26h 50mDelta
Thu 2/1912:00 pmPUS - STL
2 stops26h 23mDelta
Deal found 12/1$1,214
This Delta deal was found by Cheapflights users on 11/30. 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.
Sun 1/186:35 amSTL - PUS
2 stops34h 35mDelta
Thu 1/2212:00 pmPUS - STL
2 stops23h 37mDelta
Deal found 11/30$1,216
This Mytrip deal was found by Cheapflights users on 12/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/14:05 pmSTL - PUS
2 stops34h 35mMultiple Airlines
Thu 1/87:50 pmPUS - STL
3 stops34h 39mMultiple Airlines
Deal found 12/2$3,360
This Delta deal was found by Cheapflights users on 12/2. 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 1/17:20 amSTL - PUS
2 stops33h 50mDelta
Thu 1/84:10 pmPUS - STL
2 stops37h 38mDelta
Deal found 12/2$1,924

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 December 3, 2025.

Round-trip from

$1,214
(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 December 3, 2025.
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

Sun 2/15

5:00 pm-10:50 am

2 stops26h 50m

Busan Gimhae

Thu 2/19

12:00 pm-11:23 pm

2 stops26h 23m

$1,214

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Sun 1/18

6:35 am-8:10 am

2 stops34h 35m

Busan Gimhae

Thu 1/22

12:00 pm-8:37 pm

2 stops23h 37m

$1,216

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Thu 1/1

7:20 am-8:10 am

2 stops33h 50m

Busan Gimhae

Thu 1/8

4:10 pm-2:48 pm

2 stops37h 38m

$1,924

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Thu 1/1

4:05 pm-5:40 pm

2 stops34h 35m

Busan Gimhae

Thu 1/8

7:50 pm-3:29 pm

3 stops34h 39m

$3,360

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

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 26h 50m. 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.

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