ICN - STL

$701 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 6/5. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$1,382
Typical prices: $1,100-$972
American Airlines
Fri 8/28Tue 9/1
ICN - STL • 1 stop
Cheapest one-way
$575
Multiple Airlines
Fri 6/5
ICN - STL • 3 stops
Top airlines
American Airlines
Cheapest • from $1,382 (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
When to travel
April
Cheapest • 100% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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

Fri, Aug 28 - Tue, Sep 1
American Airlines Logo
5:50 pm - 4:14 pm
ICN
-
STL
36h 24m
1 stop
American Airlines Logo
5:42 am - 3:45 pm
STL
-
ICN
20h 03m
1 stop
$1,382American Airlines
Fri, Aug 28 - Tue, Sep 1
American Airlines Logo
5:50 pm - 11:42 pm
ICN
-
STL
19h 52m
1 stop
American Airlines Logo
6:36 am - 3:45 pm
STL
-
ICN
19h 09m
1 stop
$1,388American Airlines
Fri, Aug 28 - Tue, Sep 1
American Airlines Logo
5:50 pm - 12:14 am
ICN
-
STL
20h 24m
2 stops
American Airlines Logo
5:51 pm - 3:45 pm
STL
-
ICN
31h 54m
2 stops
$1,393American Airlines
Tue, Sep 15 - Wed, Sep 16
American Airlines Logo
5:50 pm - 11:43 pm
ICN
-
STL
19h 53m
1 stop
American Airlines Logo
12:46 pm - 3:45 pm
STL
-
ICN
36h 59m
1 stop
$1,394American Airlines
Tue, Sep 15 - Wed, Sep 16
American Airlines Logo
5:50 pm - 11:43 pm
ICN
-
STL
19h 53m
1 stop
American Airlines Logo
2:27 pm - 3:45 pm
STL
-
ICN
35h 18m
2 stops
$1,398American Airlines
Thu, Jun 11 - Mon, Jul 20
Multiple Airlines Logo
8:45 pm - 9:46 am
ICN
-
STL
27h 01m
2 stops
Multiple Airlines Logo
6:02 am - 4:00 am
STL
-
ICN
31h 58m
1 stop
$1,507Multiple Airlines
Thu, Jun 11 - Tue, Jul 21
Multiple Airlines Logo
8:45 pm - 9:46 am
ICN
-
STL
27h 01m
2 stops
Multiple Airlines Logo
7:56 pm - 5:30 pm
STL
-
ICN
31h 34m
1 stop
$1,522Multiple Airlines
Fri, Jun 12 - Fri, Jul 24
Multiple Airlines Logo
7:35 pm - 11:59 pm
ICN
-
STL
18h 24m
1 stop
Multiple Airlines Logo
3:58 pm - 9:40 pm
STL
-
ICN
39h 42m
2 stops
$1,525Multiple Airlines
Fri, Jun 12 - Tue, Jul 21
Multiple Airlines Logo
7:35 pm - 11:59 pm
ICN
-
STL
18h 24m
1 stop
Multiple Airlines Logo
8:08 pm - 9:40 pm
STL
-
ICN
35h 32m
2 stops
$1,531Multiple Airlines
Fri, Jun 12 - Sat, Jul 18
Multiple Airlines Logo
7:35 pm - 11:59 pm
ICN
-
STL
18h 24m
1 stop
Multiple Airlines Logo
8:08 pm - 9:40 pm
STL
-
ICN
35h 32m
2 stops
$1,546Multiple Airlines
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.

How much is a round-trip flight from Incheon Intl Airport to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Incheon Intl Airport to St. Louis departing in August.

What is the cheapest month to fly from Incheon Intl Airport to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Incheon Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Incheon Intl Airport to St. Louis is April, where tickets cost $0 (return) on average. On the other hand, the most expensive months are January and July, where the average cost of round-trip tickets is $1,557 and $1,430 respectively.

Find deals

Good to know

Low seasonNovember
Cheapest flight$575
Best time to beat the crowds with an average 44% drop in price.
Most popular time to fly with an average 6% 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 7 days, the lowest price for a flight from Incheon Intl Airport to St. Louis was $575 for a one-way ticket and $1,382 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.

  • 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 airline 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 8412 reviews
8.5Crew
7.8Entertainment
8.1Boarding
7.2Food
7.8Comfort
Airline reviews

Great flight with a terrific crew. Uneventful and early arrival. Thank you.

10.0 ExcellentPaul, May 2026
VCE - ATL
Read more Delta reviews

Great flight with a terrific crew. Uneventful and early arrival. Thank you.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Flight was delayed. Then eventually cancelled. The female staff that was announcing overhead was unprofessional. She was telling everyone that the company is not going to give any money for taxi, hotel etc. then eventually the flight was cancelled.

My service light was on 15 minutes before I had to get up and find a glass of ice. And I was in business class. The meals were not for either my wife and I. She did not eat the entire 10 hour flight and I managed a bowl of soup. I was expecting much more from business with what we paid.

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

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

Information on your arrival and departure airports

Seoul Incheon Airport (ICN)
St. Louis (STL)