ICN - STL

$587 Find Cheap Flights from Seoul Incheon Airport to St. Louis

This is the cheapest round-trip 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 9/19. 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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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, Sep 19 - Mon, Oct 20
Air Canada Logo
6:00 pm - 7:57 pmICN-STL
39h 57m1 stop
Air Canada Logo
4:05 pm - 4:15 pmSTL-ICN
34h 10m2 stops
$587Air Canada
Find Deal
Fri, Sep 19 - Mon, Oct 20
Air Canada Logo
6:00 pm - 3:18 pmICN-STL
35h 18m2 stops
Air Canada Logo
4:05 pm - 4:15 pmSTL-ICN
34h 10m2 stops
$594Air Canada
Find Deal
Wed, Oct 15 - Wed, Oct 29
Delta Logo
7:40 pm - 12:24 amICN-STL
18h 44m1 stop
Delta Logo
6:40 am - 4:50 pmSTL-ICN
20h 10m1 stop
$632Delta
Find Deal
Wed, Oct 15 - Wed, Oct 29
Delta Logo
7:20 pm - 8:51 amICN-STL
27h 31m2 stops
Delta Logo
7:30 pm - 4:30 pmSTL-ICN
31h 00m2 stops
$645Delta
Find Deal
Tue, Oct 28 - Tue, Nov 11
United Airlines Logo
11:45 am - 4:27 pmICN-STL
18h 42m1 stop
United Airlines Logo
4:55 pm - 5:40 amSTL-ICN
21h 45m2 stops
$664United Airlines
Find Deal
Fri, Sep 19 - Sun, Oct 26
United Airlines Logo
4:50 pm - 10:02 amICN-STL
31h 12m2 stops
United Airlines Logo
5:29 pm - 3:15 pmSTL-ICN
31h 46m1 stop
$667United Airlines
Find Deal
Mon, Sep 15 - Tue, Oct 14
 Logo
6:40 pm - 11:09 pmICN-STL
18h 29m1 stop
 Logo
8:53 am - 5:20 pmSTL-ICN
18h 27m1 stop
Mon, Sep 29 - Mon, Oct 6
 Logo
6:20 pm - 3:44 pmICN-STL
35h 24m2 stops
 Logo
6:33 am - 5:55 pmSTL-ICN
21h 22m1 stop
Fri, Sep 19 - Mon, Oct 20
Korean Air Logo
6:40 pm - 11:09 pmICN-STL
18h 29m1 stop
Korean Air Logo
8:53 am - 5:20 pmSTL-ICN
18h 27m1 stop
$713Korean Air
Find Deal
Mon, Oct 13 - Mon, Nov 3
Korean Air Logo
6:40 pm - 11:07 pmICN-STL
18h 27m1 stop
Korean Air Logo
6:40 am - 4:50 pmSTL-ICN
19h 10m1 stop
$723Korean Air
Find Deal
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.

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
Cheapest flight$587
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 26% 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 $587 for a round-trip ticket.

  • 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?

    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 7982 reviews
8.5Crew
7.9Comfort
7.9Entertainment
8.2Boarding
7.3Food
Airline reviews

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

2.0 MediocreMichael, Aug 2025SLC - CDC
Read more Delta reviews

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

On this flight I felt the food offering was not as complete as on previous flights. The tomato salad was a bit off and there was nothing additional such a bread or butter. The breakfast was only one option, so you either ate what they had or ate nothing. The crew was efficient, but most seemed frustrated throughout the flight. The flight arrived early and was obstacle-free, so I’m overall quite happy, but the shine in the rest of the experience just wasn’t there.

Our seats were comfortable with adequate room to stretch out and recline. The food was tasty and served it just the right intervals. Our flight attendant was extra attentive and friendly. Flight arrived early. And the most turbulence. Overall that’s good and experience for an 11 hour flight as can be hoped for

The seats got pretty uncomfortable pretty fast. The armrests are bigger than on other planes, so I had less room in the actual seat. My butt hurt by the end of the flight. :/ comfort was the primary issue. The crew were fantastic!

I believe that a four-hour trip should have a meal. Delta had none.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

There was supposed to be a meal served, but there wasn’t and the major toilet was out of order

They made us board and then deboard due to mechanical issue which delayed the departure by almost 2 hours and we barely made our connecting flight. These quality checks should've been done before boarding not after.

Having to up charge for a seat assignment is not good. Delta can do better

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

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