ICN - STL

$434 Find Cheap Flights from Seoul Incheon Airport to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Incheon Intl to St. Louis departing on 6/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$857
Air Canada
Tue 5/5Sat 5/9
ICN - STL • 2 stops
Cheapest one-way
$434
Multiple Airlines
Mon 6/8
ICN - STL • 2 stops
Top airlines
Air Canada
Cheapest • from $857 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Incheon Intl and St. Louis. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Salt Lake City (SLC)
Cheapest • Avg $711 (round-trip)
Salt Lake City (SLC)
Shortest trip • 15h 38m (one-way)
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Incheon Intl to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Incheon Intl to St. Louis

Tue, May 5 - Sat, May 9
Air Canada Logo
5:45 pm - 1:13 pm
ICN
-
STL
33h 28m
2 stops
Air Canada Logo
4:15 pm - 4:05 pm
STL
-
ICN
33h 50m
2 stops
$857Air Canada
Wed, Jun 3 - Mon, Aug 24
Air Canada Logo
5:45 pm - 12:06 pm
ICN
-
STL
32h 21m
2 stops
Air Canada Logo
5:20 am - 4:05 pm
STL
-
ICN
20h 45m
2 stops
$859Air Canada
Tue, May 26 - Thu, Jun 25
Air Canada Logo
5:45 pm - 11:57 pm
ICN
-
STL
20h 12m
2 stops
Air Canada Logo
1:15 pm - 4:05 pm
STL
-
ICN
36h 50m
2 stops
$914Air Canada
Tue, May 26 - Thu, Jun 25
Air Canada Logo
5:45 pm - 11:57 pm
ICN
-
STL
20h 12m
2 stops
Air Canada Logo
7:25 am - 5:30 pm
STL
-
ICN
20h 05m
1 stop
$930Air Canada
Wed, Jun 3 - Mon, Aug 24
Air Canada Logo
5:45 pm - 12:06 pm
ICN
-
STL
32h 21m
2 stops
Air Canada Logo
8:55 am - 5:30 pm
STL
-
ICN
18h 35m
1 stop
$932Air Canada
Wed, Jun 3 - Wed, Aug 26
Air Canada Logo
5:45 pm - 11:57 pm
ICN
-
STL
20h 12m
2 stops
Air Canada Logo
8:55 am - 5:30 pm
STL
-
ICN
18h 35m
1 stop
$937Air Canada
Fri, Apr 10 - Mon, Apr 20
Air Canada Logo
7:05 pm - 12:22 pm
ICN
-
STL
31h 17m
2 stops
Air Canada Logo
6:05 pm - 4:05 pm
STL
-
ICN
32h 00m
2 stops
$950Air Canada
Thu, Apr 9 - Mon, Apr 20
Air Canada Logo
5:45 pm - 3:24 pm
ICN
-
STL
35h 39m
2 stops
Air Canada Logo
6:05 pm - 4:05 pm
STL
-
ICN
32h 00m
2 stops
$953Air Canada
Tue, Apr 14 - Tue, Apr 21
Air Canada Logo
5:45 pm - 3:24 pm
ICN
-
STL
35h 39m
2 stops
Air Canada Logo
4:30 pm - 4:05 pm
STL
-
ICN
33h 35m
2 stops
$955Air Canada
Mon, Apr 13 - Sun, Apr 19
Air Canada Logo
5:45 pm - 3:24 pm
ICN
-
STL
35h 39m
2 stops
Air Canada Logo
4:05 pm - 4:05 pm
STL
-
ICN
34h 00m
2 stops
$956Air Canada
Booking Insights

KAYAK's insights & trends for Incheon Intl to St. Louis flights

Get data-powered insights and trends into flights from Incheon Intl to St. Louis to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seoul Incheon Airport to St. Louis?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seoul Incheon Airport to St. Louis were found on Air Canada ($857) and American Airlines ($1,169).

Good to know

Low seasonNovember
Cheapest flight$434
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly with an average 65% increase in price.
Flight from Seoul Incheon Airport to St. Louis

When to book flights from Incheon Intl to St. Louis

Are your dates flexible? Find out the best times to travel from Incheon Intl to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seoul Incheon Airport to St. Louis flights

  • What is the cheapest flight from Incheon Intl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from Incheon Intl Airport to St. Louis was $434 for a one-way ticket and $857 for a round-trip.

  • Do I need a passport to fly between Seoul Incheon Airport and St. Louis?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seoul Incheon Airport and on arrival in St. Louis.

  • Which aircraft models fly most regularly from Seoul Incheon Airport to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seoul Incheon Airport to St. Louis?

    oneworld, and SkyTeam are the airline alliances operating flights between Seoul Incheon Airport and St. Louis, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Incheon to St. Louis, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Incheon to St. Louis are Delta and American Airlines. With an average price for the route of $784 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $1,621 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Seoul Incheon Airport to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seoul Incheon Airport to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seoul Incheon Airport to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Seoul Incheon Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seoul Incheon Airport to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Seoul Incheon Airport with another airline. Booking your flights between Seoul Incheon Airport and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seoul Incheon Airport to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Seoul Incheon Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Incheon Intl to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Incheon to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Incheon Intl to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8242 reviews
7.9Comfort
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
Airline reviews

alike schedule and times it’s very good for me, I will stay wad delta for ever

10.0 Excellentomar, Feb 2026
RAK - ATL
Read more Delta reviews

alike schedule and times it’s very good for me, I will stay wad delta for ever

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

Flight was delayed due to crew being not on time

Flight crew issues delayed my flight by 2 1/2 hours. Causing me to miss my connection.

Lack of gluten free options in food service. I have Celiac disease and it appears you no longer offer special meals for people with dietary restrictions. I am a frequent flyer traveling into and out of Omaha airport. I have noticed over the course of several months that although our flight typically arrives ahead of schedule (awesome job AA!) - we typically sit on the runway for several minutes waiting for the ground crew to get in place. Not sure if it is a ground crew issue or a gate availability issue (due to construction at this airport). Seems to be more of a ground crew being on time issue.

Arrived early picked up my bag in a few minutes- great trip - thank you

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

Flight to Tampa was delayed taking off due to plane arriving late but no other issues

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Worst experience ever. Flight could not land in Charlotte for what we were told was a ground stop. Had to be diverted to Raleigh to refuel. Strangely during ground stop, our connecting flight had no issue taking off on time causing us to miss our flight. We were told there were no other flights that day to our final destination and that two days out was the next one. The only flights to get us there were from Chicago the next morning. Completely opposite direction but it was a direct flight. So we get flown to Chicago and have to find a hotel in our own dime. The flight in the morning was also delayed. Thankfully only a short time. The non too of all this, our luggage did not arrive by the time we were there. Communication was terrible, through the entire trip. Complete incompetence. Will never fly American again.

I am an AA flyer for a very long time... AA has yet to disappoint.

Flight was delayed. Not much information on when the flight would take off. Eventually we were told it was maintenance. App was not giving updates.

Everything you need to know for your flight from Incheon Intl to St. Louis

Information on your arrival and departure airports