$481 Cheap United flights St. Louis (STL) to Seoul (ICN)

View $481 flight on Sat, Mar 14, 2026Opens in a new window

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$481 Cheap United flights St. Louis (STL) to Seoul (ICN)

Prices were available within the past 7 days and start at $481 for one-way flights and $867 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Apr 4 - Sat, Apr 11
STL
St. Louis
ICN
Seoul
$867 Roundtrip, found 2 hours ago
$867
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Apr 4 from St. Louis to Seoul, returning Sat, Apr 11, priced at $867 found 2 hours ago
United
Sat, Apr 4 - Sat, Apr 11
STL
St. Louis
ICN
Seoul
$871 Roundtrip, found 2 hours ago
$871
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Apr 4 from St. Louis to Seoul, returning Sat, Apr 11, priced at $871 found 2 hours ago
United
Thu, Aug 21 - Sat, Aug 30
STL
St. Louis
ICN
Seoul
$874 Roundtrip, found 2 hours ago
$874
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Aug 21 from St. Louis to Seoul, returning Sat, Aug 30, priced at $874 found 2 hours ago
United
Mon, Sep 15 - Mon, Oct 20
STL
St. Louis
ICN
Seoul
$884 Roundtrip, found 5 hours ago
$884
Roundtrip
found 5 hours ago
Select United flight, departing Mon, Sep 15 from St. Louis to Seoul, returning Mon, Oct 20, priced at $884 found 5 hours ago
United
Sun, Feb 22 - Mon, Mar 2
STL
St. Louis
ICN
Seoul
$891 Roundtrip, found 14 hours ago
$891
Roundtrip
found 14 hours ago
Select United flight, departing Sun, Feb 22 from St. Louis to Seoul, returning Mon, Mar 2, priced at $891 found 14 hours ago
United
Sun, Sep 14 - Wed, Oct 1
STL
St. Louis
ICN
Seoul
$893 Roundtrip, found 1 day ago
$893
Roundtrip
found 1 day ago
Select United flight, departing Sun, Sep 14 from St. Louis to Seoul, returning Wed, Oct 1, priced at $893 found 1 day ago
Flights from St. Louis (STL) to Seoul (ICN)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Incheon Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, Cathay Pacific, Delta, Hawaiian Airlines, Korean Air, United
Popular airline
Air Canada
Distance
6674 mi

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Incheon Intl. Airport (ICN)?
You can discover cheap return United Airlines flights from $867 from STL to ICN by organizing your results from "Price (lowest to highest)" on Expedia. Or search for options from $481 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to ICN with United Airlines?
United Airlines flights to Seoul are often cheaper in the quieter months of January and February. Whether you're after a return or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Incheon Intl. Airport (ICN) with United Airlines?
To discover cheap flights from STL to ICN with United Airlines, begin your search about one month before your planned departure. You can save 17% when you lock in your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another useful tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Incheon Intl. Airport (ICN)?
Click on the "Nonstop" filter when browsing for direct United Airlines flights from STL to ICN. You'll also be able to compare other airlines offering the same nonstop route.
What is the earliest United Airlines flight from STL to ICN?
To find the earliest departures from STL to ICN with United Airlines, sort your results by "Early Morning" and "Morning." Choosing an early flight generally means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Seoul?
Get on a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Seoul, and you're most likely to touch down at Incheon Intl. Airport (ICN). This is the airline's main hub in this city.
Why fly with United Airlines from STL to ICN?
With a rewarding loyalty program, United Airlines is a top choice for many passengers flying from STL to ICN. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Incheon Intl. Airport (ICN)?
Depending on the ticket type you purchased, a fee is typically charged if you cancel or change your booking more than 24 hours after it's been confirmed. To secure plane tickets with more flexibility, select our "Changes included" and "No cancel fee" boxes when you search for flights. For additional information on changing or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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