$563 Cheap Flights from St. Louis (STL) to Busan (PUS)

View $563 flight on Sat, Mar 28, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Gimhae Airport (PUS)

Cheap Flights from St. Louis to Busan (STL-PUS)

Prices were available within the past 7 days and start at $563 for one-way flights and $1,239 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,239 Roundtrip, found 23 hours ago
$1,239
Roundtrip
found 23 hours ago
Select Delta flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,239 found 23 hours ago
Korean Air
Wed, Oct 1 - Fri, Oct 3
STL
St. Louis
PUS
Busan
$1,239 Roundtrip, found 6 days ago
$1,239
Roundtrip
found 6 days ago
Select Korean Air flight, departing Wed, Oct 1 from St. Louis to Busan, returning Fri, Oct 3, priced at $1,239 found 6 days ago
Delta
Fri, Oct 3 - Mon, Oct 6
STL
St. Louis
PUS
Busan
$1,240 Roundtrip, found 5 days ago
$1,240
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 3 from St. Louis to Busan, returning Mon, Oct 6, priced at $1,240 found 5 days ago
American Airlines
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,242 Roundtrip, found 23 hours ago
$1,242
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,242 found 23 hours ago
Korean Air
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,243 Roundtrip, found 23 hours ago
$1,243
Roundtrip
found 23 hours ago
Select Korean Air flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,243 found 23 hours ago
Korean Air
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,244 Roundtrip, found 23 hours ago
$1,244
Roundtrip
found 23 hours ago
Select Korean Air flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,244 found 23 hours ago
Delta
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,245 Roundtrip, found 23 hours ago
$1,245
Roundtrip
found 23 hours ago
Select Delta flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,245 found 23 hours ago
Delta
Fri, Oct 3 - Mon, Oct 6
STL
St. Louis
PUS
Busan
$1,247 Roundtrip, found 5 days ago
$1,247
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 3 from St. Louis to Busan, returning Mon, Oct 6, priced at $1,247 found 5 days ago
Southwest Airlines
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,267 Roundtrip, found 23 hours ago
$1,267
Roundtrip
found 23 hours ago
Select Southwest Airlines flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,267 found 23 hours ago
Alaska Airlines
Sun, Feb 1 - Fri, May 1
STL
St. Louis
PUS
Busan
$1,309 Roundtrip, found 23 hours ago
$1,309
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Sun, Feb 1 from St. Louis to Busan, returning Fri, May 1, priced at $1,309 found 23 hours ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS) cost?
Snag a cheap one-way flight from $563 or cheap return flight from $1,239 from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS)?
The cheapest month to fly from STL to PUS is February, when there's less demand. Off-peak months are generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from STL to PUS. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS)?
There aren't any daily nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from STL to PUS?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a range of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS)?
To reach Gimhae Airport (PUS) on schedule, book a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS) last-minute?
Waiting until just before your departure to book a ticket from STL to PUS generally means paying more. While it's possible to find some last-minute discounts, they aren't always guaranteed. Keep your travel schedule open to maximize your chances of scoring a bargain.
Is it cheaper to book a STL to PUS flight and hotel package?
Booking a STL to PUS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our wide range of accommodations and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Gimhae Airport (PUS)?
Usually, it's possible to cancel or reschedule your STL to PUS flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Gimhae
Airlines serving
Delta, Korean Air
Roundtrip price
$1,238
Distance
6745 mi

Book with confidence

Book with confidence

St. Louis to Busan Flights

The cheapest times to fly from St. Louis to Busan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Busan are during the month of February. You can find some of the cheapest flights from St. Louis to Busan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Busan

Sunday is one of the best days to book for cheap flights from St. Louis to Busan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Busan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Busan in 2025. You can also book with separate airlines for your outbound and return journeys, from $563 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Busan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Busan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Busan Flights

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*Available to One Key members.