ICN - STL

$566 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 5/19. 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, 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

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

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
$1,313
Typical prices: $1,122-$833
Delta
Sat 6/6Sat 6/20
ICN - STL • 1 stop
Cheapest one-way
$566
Multiple Airlines
Tue 5/19
ICN - STL • 3 stops
Top airlines
Cheapest • from $1,313 (round-trip)
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
Cheapest • Avg $711 (round-trip)
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

Sat, Jun 6 - Sat, Jun 20
Delta Logo
7:40 pm - 8:42 am
ICN
-
STL
27h 02m
1 stop
Delta Logo
5:42 pm - 5:20 pm
STL
-
ICN
33h 38m
1 stop
$1,313Delta
Mon, Apr 27 - Sun, May 3
Delta Logo
7:20 pm - 5:26 pm
ICN
-
STL
36h 06m
1 stop
Delta Logo
5:35 pm - 5:20 pm
STL
-
ICN
33h 45m
1 stop
$1,373Delta
Thu, May 28 - Thu, Jun 4
Air Canada Logo
5:45 pm - 11:57 pm
ICN
-
STL
20h 12m
2 stops
Air Canada Logo
2:15 pm - 4:05 pm
STL
-
ICN
35h 50m
2 stops
$1,397Air Canada
Sat, Jun 6 - Sat, Jun 20
Air Canada Logo
5:45 pm - 12:06 pm
ICN
-
STL
32h 21m
2 stops
Air Canada Logo
8:40 am - 5:30 pm
STL
-
ICN
18h 50m
1 stop
$1,423Air Canada
Mon, Apr 27 - Sun, May 3
Delta Logo
7:20 pm - 1:23 pm
ICN
-
STL
32h 03m
1 stop
Delta Logo
6:45 am - 4:50 pm
STL
-
ICN
20h 05m
2 stops
$1,430Delta
Tue, Jun 23 - Tue, Jul 14
Multiple Airlines Logo
9:00 pm - 1:52 pm
ICN
-
STL
30h 52m
1 stop
Multiple Airlines Logo
7:23 pm - 4:35 am
STL
-
ICN
19h 12m
1 stop
$1,444Multiple Airlines
Fri, Jun 26 - Fri, Jul 31
Delta Logo
7:00 pm - 10:28 am
ICN
-
STL
29h 28m
2 stops
Delta Logo
7:54 pm - 3:20 pm
STL
-
ICN
29h 26m
1 stop
$1,457Delta
Thu, Jul 16 - Tue, Jul 21
Multiple Airlines Logo
9:00 pm - 11:59 pm
ICN
-
STL
16h 59m
1 stop
Multiple Airlines Logo
7:23 pm - 4:35 am
STL
-
ICN
19h 12m
1 stop
$1,490Multiple Airlines
Thu, Jul 16 - Tue, Jul 21
Multiple Airlines Logo
9:00 pm - 1:52 pm
ICN
-
STL
30h 52m
1 stop
Multiple Airlines Logo
7:56 pm - 4:45 am
STL
-
ICN
18h 49m
1 stop
$1,499Multiple Airlines
Fri, Jul 3 - Sat, Jul 11
Delta Logo
7:20 pm - 12:39 am
ICN
-
STL
19h 19m
1 stop
Delta Logo
5:00 pm - 3:20 pm
STL
-
ICN
32h 20m
1 stop
$1,507Delta
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 Delta ($1,313) and Air Canada ($1,397).

Good to know

Low seasonNovember
Cheapest flight$566
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly with an average 5% 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 $566 for a one-way ticket and $1,313 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 $835 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 7.1.

  • 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 8404 reviews
7.9Comfort
8.1Boarding
7.2Food
8.5Crew
7.8Entertainment
Airline reviews

The tray table was broken and the food was terrible.

4.0 OkayJeremy, Apr 2026
BNA - BOS
Read more Delta reviews

The tray table was broken and the food was terrible.

The gentleman at the gate I think his name is RIE was exceptional

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

No entertainment. Plane was so small had to pink tag a carry on ive used for 20 years easily on board. The fact the flight got in at midnight, had to wait for crew in fort wayne to allow the plane to approach the gate, THEN had to wait for bag on jet bridge made experience irritating at best.

Crew was great. Near on time departure and early arrival. Snacks are always meh. Not a fan of the "pay for everything including miles " proposal unless base flight rate going to be 100 bucks.

Would have been better if there was a nonstop flight from Tampa to Norfolk or Tampa to New Port News.

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

The flight was smooth, the crew was great but the plane was quite old

Everything was great until I lost my water bottle and they can’t seem to locate it. I know I left it on the plane though.

Flight was fine, but not having WiFi was a major negative

When I booked my flight a month ago - I selected a seat. That seat was NOT the one I ended up with when I checked into my flight the day before. This is the second time this has occurred. So, I checked my next flight on Wednesday and Thursday and no seat was assigned. Poor, very poor customer service.

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

Incredibly delayed. First delay was due to plane coming in being late. Resulted in 30 minute delay. Boarded and then had multiple mechanical issues. Was on plane for an hour until they told people they could get off if they wanted but couldn't come back. Then gate agent rushed in and said they had lost control of who went off and we would all have to deplane and then get back on. They said flight had not been cancelled. Then while sitting waiting to board again they announced it would take two hours to get new plane and to wait at new gate. New plane arrived, reboarded only to find out that pilots had timed out. Waited for new pilots. In that time one of the flight attendants timed out. Never received food or water while waiting. Was confusing mess as to what was happening. Even flight attendants and gate agents were getting frustrated. Almost 6 hours delayed. Called American to received flight credit but can't get anywhere as Kayak reservation and don't have a ticket number. Reached out to Kayak but never heard back.

American flight was diverted and delayed but app didn’t show that information so I wasn’t able to change my connection until the last min.

Wifi was spotty. Tray table was very dirty when I sat down.

Very disappointing. Flight was delayed by 1.5 hours and food options are very underwhelming even for first class seats (same food given to economy seats)

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

The plane was very creaky and lots of ringing. Plane was dirty and dingy. I couldn't hear the captain's announcements from the flight deck. Not sure if it was the captain or the audio equipment, but good thing there wasn't an emergency where we needed clear instructions. The overhead compartments were clearly full, but the flight crew allowed people to stand in the back with their carry on luggage. Then after everyone boarded, they had to go to the front to gate check their luggage because there was no room for their bags and then they returned to their seats...such a waste of time when clearly the overhead compartments were full when they originally boarded.

The new planes (American Eagle) are beautiful and especially comfortable. The flight attendants are consistently professional and courteous. And, while it may seem inconsequential, the new liquid tube of coffee creamer—in contrast to the powdered coffee creamer—makes all the difference in a cup of coffee.

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

Information on your arrival and departure airports