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$1,241+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PUS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap 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 July 3, 2025.

Round-trip from

$1,241
(Delta)
From Lambert-St Louis to Busan Gimhae
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Find 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 July 3, 2025.

This Delta deal was found by Cheapflights users on 7/3. 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 8/156:40 amSTL - PUS
2 stops35h 05mDelta
Thu 8/218:05 amPUS - STL
2 stops30h 33mDelta
Deal found 7/3$1,241
This Korean Air deal was found by Cheapflights users on 6/30. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:45 amSTL - PUS
2 stops23h 00mKorean Air
Thu 12/184:10 pmPUS - STL
2 stops21h 52mKorean Air
Deal found 6/30$1,245
This Mytrip deal was found by Cheapflights users on 7/3. 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.
Fri 8/152:30 pmSTL - PUS
3 stops30h 45mMultiple Airlines
Thu 8/217:35 amPUS - STL
3 stops42h 09mMultiple Airlines
Deal found 7/3$1,535

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 July 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

Fri 8/15

6:40 am-7:45 am

2 stops35h 05m

Busan Gimhae

Thu 8/21

8:05 am-12:38 am

2 stops30h 33m

$1,241

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Fri 8/15

2:30 pm-11:15 am

3 stops30h 45m

Busan Gimhae

Thu 8/21

7:35 am-11:44 am

3 stops42h 09m

$1,535

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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.

Reviews of airlines servicing Busan

Get insights into the airlines that provide service to Busan. 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 Busan. Reviews last updated July 3, 2025.
Read reviews from past customers who have flown Korean Air and Delta from St. Louis to Busan. 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
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,982 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Busan?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Busan (average of $1,166). Flying from St. Louis to Busan in December is currently the most expensive (average of $2,247). 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.

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