$588 Cheap Flights from Busan (PUS) to St. Louis (STL)

View $588 flight on Wed, Nov 19, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $588 for one-way flights and $834 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Dec 17 - Sun, Jan 11
PUS
Busan
STL
St. Louis
$834 Roundtrip, found 3 days ago
$834
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Dec 17 from Busan to St. Louis, returning Sun, Jan 11, priced at $834 found 3 days ago
Korean Air
Tue, Dec 23 - Sun, Jan 11
PUS
Busan
STL
St. Louis
$834 Roundtrip, found 3 days ago
$834
Roundtrip
found 3 days ago
Select Korean Air flight, departing Tue, Dec 23 from Busan to St. Louis, returning Sun, Jan 11, priced at $834 found 3 days ago
Delta
Wed, Dec 17 - Thu, Jan 8
PUS
Busan
STL
St. Louis
$834 Roundtrip, found 3 days ago
$834
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Dec 17 from Busan to St. Louis, returning Thu, Jan 8, priced at $834 found 3 days ago
Delta
Wed, Dec 17 - Wed, Jan 7
PUS
Busan
STL
St. Louis
$848 Roundtrip, found 3 days ago
$848
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Dec 17 from Busan to St. Louis, returning Wed, Jan 7, priced at $848 found 3 days ago
Korean Air
Sun, Dec 21 - Sun, Jan 11
PUS
Busan
STL
St. Louis
$888 Roundtrip, found 3 days ago
$888
Roundtrip
found 3 days ago
Select Korean Air flight, departing Sun, Dec 21 from Busan to St. Louis, returning Sun, Jan 11, priced at $888 found 3 days ago
Delta
Sun, Dec 21 - Thu, Jan 8
PUS
Busan
STL
St. Louis
$888 Roundtrip, found 3 days ago
$888
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Dec 21 from Busan to St. Louis, returning Thu, Jan 8, priced at $888 found 3 days ago
Delta
Sun, Dec 21 - Wed, Jan 7
PUS
Busan
STL
St. Louis
$902 Roundtrip, found 3 days ago
$902
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Dec 21 from Busan to St. Louis, returning Wed, Jan 7, priced at $902 found 3 days ago
Korean Air
Sun, May 10 - Sun, May 31
PUS
Busan
STL
St. Louis
$936 Roundtrip, found 5 days ago
$936
Roundtrip
found 5 days ago
Select Korean Air flight, departing Sun, May 10 from Busan to St. Louis, returning Sun, May 31, priced at $936 found 5 days ago
Korean Air
Sun, Dec 21 - Fri, Jan 9
PUS
Busan
STL
St. Louis
$957 Roundtrip, found 3 days ago
$957
Roundtrip
found 3 days ago
Select Korean Air flight, departing Sun, Dec 21 from Busan to St. Louis, returning Fri, Jan 9, priced at $957 found 3 days ago
Korean Air
Mon, Dec 22 - Sun, Jan 11
PUS
Busan
STL
St. Louis
$974 Roundtrip, found 3 days ago
$974
Roundtrip
found 3 days ago
Select Korean Air flight, departing Mon, Dec 22 from Busan to St. Louis, returning Sun, Jan 11, priced at $974 found 3 days ago

Frequently asked questions

How much does a flight from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight from $588 or cheap return flight from $834 from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from PUS to STL is December, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PUS to STL flight.
How many flights per day from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL)?
Direct flights from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PUS to STL?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Departures after this time are 22% more likely to be canceled.**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 Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute fares from PUS to STL are usually more expensive. To lock in the best rates, start looking for flights early. That said, if your travel plans are flexible, you may land a cheap ticket just before your departure.
Is it cheaper to book a PUS to STL flight and hotel package?
You can save money by booking a PUS to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've chosen your preferred flights and accommodations, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Gimhae Airport (PUS) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can reschedule or cancel your PUS to STL flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you want more details, go to our Customer Service portal.

Travel information

Travel information

Origin airport
Gimhae
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$833
Distance
6745 mi

Book with confidence

Book with confidence

Busan to St. Louis Flights

The cheapest times to fly from Busan to St. Louis

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 Busan to St. Louis are during the month of December. You can find some of the cheapest flights from Busan to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Busan to St. Louis: 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 Busan to St. Louis

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 Busan to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $588 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 Busan to St. Louis 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 Busan to St. Louis 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.

 

Busan to St. Louis Flights

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*Available to One Key members.