￥64,040 Cheap Flights from St. Louis (STL) to Seoul (ICN)

View ￥64,040 flight on Mon, Dec 1, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Incheon Intl. Airport (ICN)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from St. Louis to Seoul (STL-ICN)

Prices were available within the past 7 days and start at ￥64,040 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from St. Louis (STL) to Seoul (ICN)

September is typically the cheapest month to fly

From ￥113,518 - ￥229,497 per traveler.

Frequently asked questions

How much is a flight from Lambert Field to ICN?
The lowest price advertised for a round-trip flight from STL to Incheon Airport is . But you better act soon. This figure is taken from fares quoted within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from STL to Seoul–Incheon Intl. Airport?
The majority of flights can be canceled online, but whether or not you are charged a fee all comes down to your airline. If you do have to cancel your break, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from STL to Incheon Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert-St. Louis Intl. Airport (STL) to Seoul–Incheon Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from St. Louis Lambert International Airport to Incheon Intl. Airport (ICN)?
Make the 17 hours and 19 minutes between STL and Incheon Intl. Airport (ICN) as comfortable as possible. Pack the essentials, like warm clothes, a pillow and earplugs, and simply enjoy the flight!
How far is the flight from St. Louis Lambert International Airport to Incheon Intl. Airport (ICN)?
With around 10,800 kilometers separating STL and Incheon Intl. Airport (ICN), your flight will be a long one. Pack wisely and make your journey comfortable. Simple things like an eye mask and some noise-canceling headphones can make a massive difference.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Incheon Airport?
You won't find any airlines flying directly between STL and Seoul–Incheon Intl. Airport, so be prepared to make at least one stop on your journey. A layover, whether short or long, can be a nice way to break up a trip!
Are St. Louis Lambert International Airport to Seoul–Incheon Intl. Airport flight tickets cheaper when they're purchased at the last minute?
Airline tickets from St. Louis Lambert International Airport to ICN are available up to a year prior to departure on Expedia. And although you may occasionally pick up a fantastic last-minute deal, it's never something you can count on. Also, booking your flights well in advance means you'll have more options — and you can avoid getting caught in the dreaded middle seat! We regularly update our fares to bring you the best bargains, so check back often for all the latest specials.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Incheon Intl.
Distance
10679 km

Book with confidence

Book with confidence

St. Louis to Seoul Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from St. Louis to will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Seoul.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with STL to ICN flights that won’t make your bank account wince. Ready to temporarily leave behind St. Louis for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to ICN with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

St. Louis to Seoul Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to Expedia members.