$406 Find Cheap Flights from Illinois to Seoul - Compare and Save

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 8/23. 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

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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

Mon, Oct 5 - Wed, Nov 4
Air Canada Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
8:10 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
34h 16m1 stop Toronto Pearson Intl
$1,018Air Canada
Wed, Sep 9 - Tue, Sep 15
Air Canada Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:45 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
34h 15m2 stops Vancouver Intl Toronto Pearson Intl
$1,018Air Canada
Wed, Nov 18 - Wed, Nov 25
Multiple Airlines Logo
6:00 am - 12:45 pmMLI  Moline Quad-City-ICN Incheon Intl
39h 45m2 stops Chicago O'Hare Intl Hong Kong Intl
Multiple Airlines Logo
1:55 am - 4:35 pmICN  Incheon Intl-MLI Moline Quad-City
29h 40m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,071Multiple Airlines
Tue, Nov 17 - Wed, Nov 25
Multiple Airlines Logo
11:33 am - 12:40 amMLI  Moline Quad-City-ICN Incheon Intl
46h 07m2 stops Dallas/Fort Worth Hong Kong Intl
Multiple Airlines Logo
1:55 am - 4:35 pmICN  Incheon Intl-MLI Moline Quad-City
29h 40m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,071Multiple Airlines
Mon, Sep 7 - Wed, Sep 16
Asiana Airlines Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Asiana Airlines Logo
7:05 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
32h 55m1 stop Toronto Pearson Intl
$1,077Asiana Airlines
Mon, Oct 26 - Wed, Nov 4
Asiana Airlines Logo
4:05 pm - 5:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
35h 20m1 stop Toronto Pearson Intl
Asiana Airlines Logo
8:10 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
34h 16m1 stop Toronto Pearson Intl
$1,082Asiana Airlines
Mon, Feb 8 - Wed, Feb 17
EVA Air Logo
11:30 pm - 7:15 pmORD  Chicago O'Hare Intl-GMP Seoul Gimpo Intl
28h 45m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
8:15 pm - 7:35 pmGMP  Seoul Gimpo Intl-ORD Chicago O'Hare Intl
38h 20m1 stop Taipei City Sung Shan
$1,104EVA Air
Mon, Oct 5 - Tue, Nov 17
EVA Air Logo
12:30 am - 7:15 pmORD  Chicago O'Hare Intl-GMP Seoul Gimpo Intl
28h 45m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
7:00 pm - 7:35 pmGMP  Seoul Gimpo Intl-ORD Chicago O'Hare Intl
39h 35m1 stop Taipei City Sung Shan
$1,104EVA Air
Tue, Nov 3 - Tue, Dec 8
Delta Logo
7:45 am - 4:20 pmSTL  Lambert-St Louis-ICN Incheon Intl
17h 35m1 stop Salt Lake City
Delta Logo
6:35 pm - 12:40 amICN  Incheon Intl-STL Lambert-St Louis
21h 05m1 stop Salt Lake City
$1,107Delta
Mon, Sep 7 - Mon, Sep 14
Delta Logo
6:00 am - 2:10 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 10m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:20 pm - 12:44 amICN  Incheon Intl-STL Lambert-St Louis
19h 24m1 stop Salt Lake City
$1,107Delta
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Good to know

Low season

January

Cheapest flight

$406
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Chicago 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 $21,749
Business Class flights to Seoulfrom $5,508
Premium Economy Class flights to Seoulfrom $7,901
Economy Class flights to Seoulfrom $856