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.

$412 CHEAP FLIGHTS from Illinois to Seoul

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Cheap Flights from Illinois to Seoul

Cheap flights from Illinois to Seoul with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Thu, Nov 19 - Fri, Dec 4

9:45 am - 3:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

39h 00m1 stop Addis Ababa Bole

12:05 am - 7:40 amICN Incheon Intl-ORD Chicago O'Hare Intl

46h 35m2 stops Addis Ababa Bole Rome Fiumicino

$848Ethiopian Air

Thu, Nov 19 - Thu, Nov 26

9:45 am - 3:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

39h 00m1 stop Addis Ababa Bole

12:05 am - 7:40 amICN Incheon Intl-ORD Chicago O'Hare Intl

46h 35m2 stops Addis Ababa Bole Rome Fiumicino

$849Ethiopian Air

Mon, Nov 30 - Wed, Dec 9

11:45 am - 8:55 amORD Chicago O'Hare Intl-ICN Incheon Intl

30h 10m1 stop Istanbul

12:05 am - 10:00 amICN Incheon Intl-ORD Chicago O'Hare Intl

24h 55m1 stop Istanbul

$955Turkish Airlines

Mon, Nov 16 - Tue, Dec 1

8:15 pm - 6:20 pmORD Chicago O'Hare Intl-ICN Incheon Intl

31h 05m1 stop Istanbul

1:55 pm - 10:00 amICN Incheon Intl-ORD Chicago O'Hare Intl

35h 05m1 stop Istanbul

$955Turkish Airlines

Mon, Mar 1 - Thu, Mar 11

11:30 pm - 10:30 amORD Chicago O'Hare Intl-ICN Incheon Intl

20h 00m1 stop Taipei City Taiwan Taoyuan Intl

11:40 am - 7:35 pmICN Incheon Intl-ORD Chicago O'Hare Intl

22h 55m1 stop Taipei City Taiwan Taoyuan Intl

$1,086EVA Air

Thu, Feb 4 - Wed, Feb 17

11:30 pm - 6:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

28h 15m1 stop Taipei City Taiwan Taoyuan Intl

11:40 am - 7:35 pmICN Incheon Intl-ORD Chicago O'Hare Intl

22h 55m1 stop Taipei City Taiwan Taoyuan Intl

$1,086EVA Air

Fri, Apr 2 - Sun, Apr 18

5:43 am - 7:05 pmPIA Greater Peoria-ICN Incheon Intl

47h 22m2 stops Chicago O'Hare Intl Hong Kong Intl

1:40 pm - 6:24 pmICN Incheon Intl-PIA Greater Peoria

42h 44m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,117Cathay Pacific

Tue, Oct 20 - Tue, Nov 3

6:00 am - 5:20 pmMLI Moline Quad-City-ICN Incheon Intl

21h 20m2 stops Atlanta Hartsfield-Jackson Minneapolis St Paul

5:40 pm - 10:30 pmICN Incheon Intl-MLI Moline Quad-City

19h 50m1 stop Atlanta Hartsfield-Jackson

$1,168Delta

Tue, Oct 20 - Tue, Nov 3

11:08 am - 2:10 pmMLI Moline Quad-City-ICN Incheon Intl

37h 02m1 stop Atlanta Hartsfield-Jackson

5:40 pm - 10:30 pmICN Incheon Intl-MLI Moline Quad-City

19h 50m1 stop Atlanta Hartsfield-Jackson

$1,170Delta

Mon, Oct 26 - Sun, Nov 8

3:10 pm - 1:50 pmORD Chicago O'Hare Intl-ICN Incheon Intl

32h 40m1 stop Hong Kong Intl

1:55 am - 12:30 pmICN Incheon Intl-ORD Chicago O'Hare Intl

25h 35m1 stop Hong Kong Intl

$1,174Cathay Pacific

Tue, Oct 13 - Mon, Oct 19

12:30 am - 6:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

28h 15m1 stop Taipei City Taiwan Taoyuan Intl

12:00 pm - 8:45 pmICN Incheon Intl-ORD Chicago O'Hare Intl

22h 45m1 stop Taipei City Taiwan Taoyuan Intl

$1,086EVA Air

Tue, Oct 13 - Tue, Oct 20

12:30 am - 6:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

28h 15m1 stop Taipei City Taiwan Taoyuan Intl

7:45 pm - 8:45 pmICN Incheon Intl-ORD Chicago O'Hare Intl

39h 00m1 stop Taipei City Taiwan Taoyuan Intl

$1,086EVA Air

Tue, Oct 13 - Thu, Oct 22

12:30 am - 6:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

28h 15m1 stop Taipei City Taiwan Taoyuan Intl

12:00 pm - 8:45 pmICN Incheon Intl-ORD Chicago O'Hare Intl

22h 45m1 stop Taipei City Taiwan Taoyuan Intl

$1,121Multiple Airlines

Tue, Oct 13 - Wed, Oct 21

12:30 am - 6:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

28h 15m1 stop Taipei City Taiwan Taoyuan Intl

12:00 pm - 8:45 pmICN Incheon Intl-ORD Chicago O'Hare Intl

22h 45m1 stop Taipei City Taiwan Taoyuan Intl

$1,121Multiple Airlines

Sat, Oct 10 - Sun, Oct 25

4:15 pm - 10:25 pmORD Chicago O'Hare Intl-ICN Incheon Intl

40h 10m1 stop Hong Kong Intl

1:50 pm - 1:30 pmICN Incheon Intl-ORD Chicago O'Hare Intl

37h 40m1 stop Hong Kong Intl

$1,267Cathay Pacific

Wed, Oct 14 - Fri, Nov 13

6:00 am - 3:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

19h 45m1 stop Dallas/Fort Worth

6:50 pm - 12:01 amICN Incheon Intl-ORD Chicago O'Hare Intl

20h 11m2 stops Dallas/Fort Worth Charlotte Douglas

$1,379American Airlines

Wed, Oct 14 - Thu, Oct 22

11:00 pm - 3:45 pmORD Chicago O'Hare Intl-ICN Incheon Intl

26h 45m2 stops Lambert-St Louis Dallas/Fort Worth

5:50 pm - 7:35 amICN Incheon Intl-ORD Chicago O'Hare Intl

27h 45m1 stop Dallas/Fort Worth

$1,544American Airlines

Sat, Oct 10 - Fri, Oct 16

4:15 pm - 10:25 pmORD Chicago O'Hare Intl-ICN Incheon Intl

40h 10m1 stop Hong Kong Intl

3:10 pm - 1:55 pmICN Incheon Intl-ORD Chicago O'Hare Intl

36h 45m1 stop Hong Kong Intl

$1,567Cathay Pacific

Wed, Oct 14 - Wed, Oct 21

2:10 pm - 9:15 pmORD Chicago O'Hare Intl-GMP Seoul Gimpo Intl

17h 05m1 stop Tokyo Haneda

8:00 am - 10:45 amGMP Seoul Gimpo Intl-ORD Chicago O'Hare Intl

16h 45m1 stop Tokyo Haneda

$1,790Japan Airlines

Wed, Oct 14 - Fri, Nov 13

2:10 pm - 9:15 pmORD Chicago O'Hare Intl-GMP Seoul Gimpo Intl

17h 05m1 stop Tokyo Haneda

8:15 am - 10:00 amGMP Seoul Gimpo Intl-ORD Chicago O'Hare Intl

16h 45m1 stop Tokyo Haneda

$1,790Japan Airlines

Wed, Nov 4 - Sun, Feb 7

11:10 am - 5:15 pmORD Chicago O'Hare Intl-ICN Incheon Intl

15h 05mnonstop