$330 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 10/26. 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

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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

Wed, Oct 1 - Tue, Oct 14
Cathay Pacific Logo
4:00 pm - 9:10 pmORD-ICN
39h 10m1 stop
Cathay Pacific Logo
8:05 pm - 2:25 pmICN-ORD
32h 20m1 stop
$730Cathay Pacific
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Wed, Oct 1 - Tue, Oct 14
Cathay Pacific Logo
4:00 pm - 7:05 pmORD-ICN
37h 05m1 stop
Cathay Pacific Logo
1:40 pm - 2:25 pmICN-ORD
38h 45m1 stop
$737Cathay Pacific
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Tue, Sep 30 - Wed, Oct 29
Multiple Airlines Logo
5:30 pm - 6:45 pmORD-ICN
35h 15m1 stop
Multiple Airlines Logo
9:25 pm - 10:57 pmICN-ORD
39h 32m2 stops
$778Multiple Airlines
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Thu, Oct 16 - Sat, Oct 25
Multiple Airlines Logo
6:50 am - 3:45 pmORD-ICN
42h 55m2 stops
Multiple Airlines Logo
8:45 pm - 1:35 pmICN-ORD
30h 50m1 stop
$801Multiple Airlines
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Sat, Sep 27 - Sun, Oct 26
American Airlines Logo
3:59 pm - 3:30 pmSTL-ICN
33h 31m1 stop
American Airlines Logo
5:55 pm - 9:20 amICN-STL
29h 25m1 stop
$844American Airlines
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Fri, Oct 31 - Fri, Nov 7
American Airlines Logo
7:01 am - 3:55 pmSTL-ICN
18h 54m1 stop
American Airlines Logo
7:15 pm - 10:29 pmICN-STL
18h 14m1 stop
$849American Airlines
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Fri, Oct 24 - Sat, Nov 1
Delta Logo
6:50 am - 3:20 pmSTL-ICN
18h 30m1 stop
Delta Logo
7:30 pm - 11:07 pmICN-STL
17h 37m1 stop
$856Delta
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Fri, Oct 24 - Sun, Nov 2
Delta Logo
6:00 am - 4:30 pmSTL-ICN
20h 30m2 stops
Delta Logo
7:40 pm - 12:24 amICN-STL
19h 44m1 stop
$861Delta
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Mon, Nov 10 - Thu, Nov 27
United Airlines Logo
5:29 pm - 5:40 amSTL-ICN
21h 11m1 stop
United Airlines Logo
6:00 pm - 10:51 amICN-STL
31h 51m2 stops
$862United Airlines
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Fri, Oct 24 - Sat, Nov 1
United Airlines Logo
1:40 pm - 4:20 amSTL-ICN
24h 40m2 stops
United Airlines Logo
11:55 am - 9:54 pmICN-STL
23h 59m2 stops
$941United Airlines
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Everything you should know

Cheapest round-trip
$730
Typical prices: $953-1761
Cathay Pacific
Wed 10/1Tue 10/14
ORD - ICN • 1 stop
Cheapest non-stop
$1,519
Typical prices: $1,542-1850
Korean Air
Thu 10/23Mon 11/10
ORD - ICN • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seoul!
Useful Info

Good to know

Low seasonAugust
Cheapest flight$330
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 19% 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 $698

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