ICN - STL

$576 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 7/8. 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

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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Flights 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

Wed, Nov 12 - Wed, Dec 3
United Airlines Logo
12:45 pm - 9:54 pmICN-STL
24h 09m2 stops
United Airlines Logo
5:29 pm - 5:40 amSTL-ICN
21h 11m1 stop
$699United Airlines
Find Deal
Wed, Oct 15 - Tue, Oct 28
United Airlines Logo
11:30 am - 4:45 pmICN-STL
19h 15m1 stop
United Airlines Logo
5:29 pm - 4:40 amSTL-ICN
21h 11m1 stop
$700United Airlines
Find Deal
Wed, Nov 5 - Fri, Dec 5
 Logo
9:00 pm - 3:05 pmICN-STL
33h 05m1 stop
 Logo
2:55 pm - 5:20 amSTL-ICN
23h 25m1 stop
Sat, Nov 15 - Sat, Nov 22
Delta Logo
8:05 pm - 1:22 amICN-STL
20h 17m2 stops
Delta Logo
6:15 pm - 4:30 pmSTL-ICN
31h 15m2 stops
$735Delta
Find Deal
Sat, Nov 15 - Sat, Nov 22
Delta Logo
8:05 pm - 1:22 amICN-STL
20h 17m2 stops
Delta Logo
12:10 pm - 3:30 pmSTL-ICN
36h 20m1 stop
$739Delta
Find Deal
Mon, Sep 15 - Tue, Oct 14
 Logo
10:15 am - 1:20 pmICN-STL
17h 05m1 stop
 Logo
8:50 am - 5:20 pmSTL-ICN
18h 30m1 stop
Fri, Jul 4 - Fri, Jul 25
Korean Air Logo
6:40 pm - 11:27 pmICN-STL
18h 47m1 stop
Korean Air Logo
11:18 am - 5:20 pmSTL-ICN
16h 02m1 stop
$953Korean Air
Find Deal
Tue, Jul 1 - Sat, Jul 12
Korean Air Logo
7:40 pm - 12:43 amICN-STL
19h 03m1 stop
Korean Air Logo
11:18 am - 5:20 pmSTL-ICN
16h 02m1 stop
$1,070Korean Air
Find Deal
Tue, Jul 22 - Fri, Aug 15
Air Canada Logo
5:45 pm - 3:16 pmICN-STL
35h 31m2 stops
Air Canada Logo
1:30 pm - 4:05 pmSTL-ICN
60h 35m2 stops
$1,086Air Canada
Find Deal
Tue, Jul 22 - Fri, Aug 15
Air Canada Logo
7:05 pm - 3:16 pmICN-STL
34h 11m1 stop
Air Canada Logo
1:30 pm - 4:05 pmSTL-ICN
60h 35m2 stops
$1,093Air Canada
Find Deal
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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.

What’s the cheapest day of the week to fly from Seoul Incheon Airport to St. Louis?

The average price of all round-trip flights from Incheon Intl Airport to St. Louis clicked on KAYAK for each day over the last 12 months.

For Seoul Incheon Airport to St. Louis, Thursday is the cheapest day to fly on average and Saturday is the most expensive. Flying from St. Louis back to Seoul Incheon Airport, the best deals are generally found on Wednesday, with Friday being the most expensive.

Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$576
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 29% 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 $576 for a one-way ticket and $699 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, Star Alliance, and SkyTeam are the airline alliances operating flights between Seoul Incheon Airport and St. Louis, with SkyTeam being the most commonly used for this 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.
8.0
DeltaOverall score based on 7964 reviews
7.9Comfort
8.2Boarding
7.3Food
8.5Crew
7.9Entertainment
Airline reviews

I like for how they process during check in. It was very smoothly.

10.0 ExcellentAbdulla, Jun 2025CMH - JFK
Read more Delta reviews

I like for how they process during check in. It was very smoothly.

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

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

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