$427 Find Cheap Flights from Illinois to Seoul

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seoul departing on 12/3. 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 Seoul

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
$746
Overall average: $902
Alaska Airlines
Sat 3/28Sun 4/5
STL - ICN • 1 stop
Cheapest non-stop
$1,592
Typical prices: $1,538-$1,767
Delta
Mon 11/17Mon 11/24
ORD - ICN • Non-stop
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 Seoul!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Illinois to Seoul

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Seoul 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 Illinois to Seoul

Sat, Mar 28 - Sun, Apr 5
Alaska Airlines Logo
7:00 am - 6:35 pmSTL-ICN
21h 35m1 stop
Alaska Airlines Logo
8:35 pm - 11:55 pmICN-STL
17h 20m1 stop
$746Alaska Airlines
Find Deal
Tue, Apr 14 - Mon, Apr 20
Alaska Airlines Logo
2:55 pm - 6:35 pmSTL-ICN
37h 40m1 stop
Alaska Airlines Logo
8:35 pm - 11:55 pmICN-STL
17h 20m1 stop
$752Alaska Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 14
Multiple Airlines Logo
6:50 am - 5:10 amORD-ICN
31h 20m1 stop
Multiple Airlines Logo
9:20 pm - 8:17 pmICN-ORD
37h 57m2 stops
$819Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
Multiple Airlines Logo
2:01 pm - 5:40 amORD-ICN
24h 39m1 stop
Multiple Airlines Logo
6:55 pm - 11:42 amICN-ORD
55h 47m2 stops
$833Multiple Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
Japan Airlines Logo
6:55 am - 10:05 pmSTL-GMP
24h 10m2 stops
Japan Airlines Logo
12:05 pm - 11:57 pmGMP-STL
26h 52m2 stops
$846Japan Airlines
Find Deal
Sat, Nov 29 - Mon, Dec 8
Delta Logo
6:00 am - 3:30 pmSTL-ICN
18h 30m1 stop
Delta Logo
8:05 pm - 12:48 amICN-STL
19h 43m2 stops
$850Delta
Find Deal
Mon, Feb 23 - Sat, Feb 28
Delta Logo
5:54 pm - 4:50 pmSTL-ICN
31h 56m1 stop
Delta Logo
6:00 pm - 11:38 pmICN-STL
20h 38m1 stop
$851Delta
Find Deal
Sat, Nov 29 - Mon, Dec 8
American Airlines Logo
7:00 am - 4:45 pmSTL-ICN
18h 45m1 stop
American Airlines Logo
7:15 pm - 10:47 pmICN-STL
18h 32m1 stop
$856American Airlines
Find Deal
Sat, Nov 29 - Mon, Dec 8
American Airlines Logo
5:17 am - 4:45 pmSTL-ICN
20h 28m1 stop
American Airlines Logo
7:15 pm - 11:38 pmICN-STL
19h 23m2 stops
$860American Airlines
Find Deal
Mon, Feb 2 - Mon, Feb 9
Japan Airlines Logo
7:04 am - 10:05 pmSTL-GMP
24h 01m2 stops
Japan Airlines Logo
8:00 am - 11:59 pmGMP-STL
30h 59m2 stops
$900Japan Airlines
Find Deal
Useful Info

Good to know

Low seasonAugust
Cheapest flight$427
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly with an average 21% increase in price.
Flight from Chicago O'Hare Airport to Seoul Incheon Airport

FAQs for booking flights from Illinois to Seoul

  • How does KAYAK find such low prices on flights from Illinois to Seoul?

    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 Illinois to Seoul.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Seoul?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul from Illinois 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 Illinois to Seoul?

    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 Seoul with an airline and back to Illinois with another airline.

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

    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 Seoul from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Seoul

Cabin class types available on flights to Illinois

Cabin classes available on flights to Seoul. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Seoulfrom $26,570
Business Class flights to Seoulfrom $4,268
Prem Econ Class flights to Seoulfrom $5,635
Economy Class flights to Seoulfrom $726