$421+ Cheap flights from Illinois to Seoul (SEL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEL
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Seoul with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Illinois to SeoulExplore the most affordable flight options available from Illinois to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
Explore the most affordable flight options available from Illinois to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
This FlightHub deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:15 am -
1 stop39h 45m
Sat 10/2412:20 am -
2 stops46h 20m
Deal found 9/20![Ethiopian Air logo]()
$857
This Justfly.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:15 am -
1 stop39h 45m
Thu 10/2912:05 am -
2 stops46h 35m
Deal found 9/18![Ethiopian Air logo]()
$858
This Ethiopian Air deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ethiopian Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:15 am -
1 stop39h 30m
Sat 11/712:05 am -
2 stops46h 35m
Deal found 9/18![Ethiopian Air logo]()
$886
This Justfly.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:15 am -
1 stop39h 30m
Mon 11/2312:05 am -
2 stops46h 35m
Deal found 9/19![Ethiopian Air logo]()
$905
This Mytrip deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:30 am -
2 stops23h 50m
Wed 11/117:45 pm -
2 stops28h 11m
Deal found 9/20![Multiple Airlines logo]()
$957
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:30 am -
2 stops31h 40m
Mon 11/237:30 am -
1 stop24h 25m
Deal found 9/18![Multiple Airlines logo]()
$979
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:30 am -
2 stops23h 50m
Tue 11/108:30 pm -
1 stop35h 25m
Deal found 9/18![Multiple Airlines logo]()
$982
This FlightHub deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3011:45 am -
1 stop39h 35m
Wed 12/912:05 am -
1 stop33h 15m
Deal found 9/18![Turkish Airlines logo]()
$986
This Cathay Pacific deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:33 am -
2 stops46h 07m
Wed 11/111:55 am -
2 stops37h 12m
Deal found 9/21![Multiple Airlines logo]()
$1,051
This Gurufare deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:02 am -
2 stops39h 43m
Sun 11/81:55 am -
2 stops37h 08m
Deal found 9/18![Cathay Pacific logo]()
$1,057
This BusinessClass deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:00 am -
2 stops40h 45m
Tue 11/107:35 pm -
2 stops43h 24m
Deal found 9/18![Cathay Pacific logo]()
$1,058
This BusinessClass deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am -
2 stops42h 05m
Sat 10/178:05 pm -
2 stops41h 18m
Deal found 9/19![Cathay Pacific logo]()
$1,136
Best flights from Illinois to SeoulDiscover carefully curated flight deals from Illinois to Seoul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from Illinois to Seoul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This Cathay Pacific deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:33 am -
2 stops46h 07m
Wed 11/111:55 am -
2 stops37h 12m
Deal found 9/21![Multiple Airlines logo]()
$1,051
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:30 pm -
1 stop25h 15m
Tue 11/107:25 pm -
1 stop18h 06m
Deal found 9/18![Delta logo]()
$1,248
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/77:00 pm -
2 stops30h 25m
Tue 2/1612:45 pm -
2 stops19h 56m
Deal found 9/18![United Airlines logo]()
$1,252
This Cheapflightsfares deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:30 pm -
1 stop17h 35m
Wed 11/188:15 am -
1 stop16h 45m
Deal found 9/18![Japan Airlines logo]()
$1,405
This Qatar Airways deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/312:24 pm -
2 stops31h 06m
Tue 2/163:00 pm -
3 stops47h 16m
Deal found 9/18![Qatar Airways logo]()
$1,569
This Alaska Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:20 am -
2 stops43h 15m
Tue 11/108:00 am -
3 stops48h 37m
Deal found 9/18![Alaska Airlines logo]()
$1,584
This Finnair deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:17 pm -
2 stops29h 08m
Sat 12/1211:00 pm -
2 stops38h 30m
Deal found 9/21![Finnair logo]()
$1,595
This EVA Air deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/412:30 am -
1 stop27h 40m
Fri 1/81:50 pm -
1 stop20h 45m
Deal found 9/21![EVA Air logo]()
$1,683
This American Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:59 pm -
2 stops35h 46m
Thu 12/316:50 pm -
2 stops34h 38m
Deal found 9/18![American Airlines logo]()
$1,977
This Philippine Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:53 pm -
2 stops28h 07m
Sun 11/88:30 pm -
1 stop35h 25m
Deal found 9/19![Multiple Airlines logo]()
$1,105
This Philippine Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:55 pm -
2 stops34h 20m
Wed 10/217:20 am -
2 stops35h 40m
Deal found 9/19![Multiple Airlines logo]()
$1,112
This Delta deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:08 am -
1 stop27h 37m
Thu 11/125:40 pm -
1 stop20h 28m
Deal found 9/21![Delta logo]()
$1,248
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/77:00 pm -
2 stops30h 25m
Mon 2/156:00 pm -
2 stops20h 14m
Deal found 9/18![United Airlines logo]()
$1,252
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/35:00 pm -
1 stop21h 45m
Tue 2/165:40 pm -
1 stop19h 50m
Deal found 9/18![Delta logo]()
$1,248
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/92:35 pm -
2 stops24h 05m
Sat 2/2012:45 pm -
2 stops18h 46m
Deal found 9/18![United Airlines logo]()
$1,302
This FlightHub deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:10 pm -
1 stop30h 30m
Mon 10/2612:05 pm -
1 stop36h 55m
Deal found 9/22![Japan Airlines logo]()
$1,440
This Philippine Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:45 am -
2 stops33h 15m
Sat 10/247:20 am -
2 stops36h 20m
Deal found 9/22![Multiple Airlines logo]()
$1,222
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/95:00 pm -
1 stop21h 45m
Thu 2/185:40 pm -
1 stop19h 50m
Deal found 9/18![Delta logo]()
$1,248
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/75:41 pm -
2 stops31h 34m
Sat 2/2012:45 pm -
2 stops18h 46m
Deal found 9/18![United Airlines logo]()
$1,302
This Booking.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:10 pm -
1 stop30h 30m
Sun 10/257:40 pm -
1 stop29h 20m
Deal found 9/20![Japan Airlines logo]()
$1,441
This Alaska Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:20 am -
2 stops44h 10m
Wed 11/48:00 am -
3 stops54h 59m
Deal found 9/22![Alaska Airlines logo]()
$1,669
This China Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:05 pm -
2 stops26h 15m
Sat 11/712:30 pm -
2 stops32h 25m
Deal found 9/18![Multiple Airlines logo]()
$1,283
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/85:00 pm -
1 stop21h 45m
Fri 2/197:25 pm -
1 stop18h 05m
Deal found 9/18![Delta logo]()
$1,298
This Japan Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:30 pm -
1 stop37h 50m
Sat 11/2112:05 pm -
1 stop36h 55m
Deal found 9/21![Japan Airlines logo]()
$1,460
This Finnair deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/94:31 pm -
2 stops28h 54m
Tue 12/2211:00 pm -
2 stops35h 58m
Deal found 9/22![Finnair logo]()
$1,850
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/75:00 pm -
1 stop31h 30m
Fri 2/197:25 pm -
1 stop18h 05m
Deal found 9/18![Delta logo]()
$1,304
This China Airlines deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:45 pm -
2 stops25h 45m
Sat 10/2412:45 pm -
2 stops30h 55m
Deal found 9/19![Multiple Airlines logo]()
$1,330
This Japan Airlines deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:30 pm -
1 stop37h 50m
Thu 11/1212:05 pm -
2 stops23h 15m
Deal found 9/20![Japan Airlines logo]()
$1,470
This Qatar Airways deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:43 pm -
2 stops57h 32m
Mon 11/910:00 am -
3 stops44h 48m
Deal found 9/18![Qatar Airways logo]()
$1,976
This United Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/125:35 pm -
2 stops31h 40m
Tue 2/1612:45 pm -
2 stops18h 46m
Deal found 9/18![United Airlines logo]()
$1,512
Last-minute flights from Illinois to SeoulDiscover last-minute flight deals from Illinois to Seoul. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Seoul. Data last updated September 23, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:00 am -
1 stop18h 45m
Mon 9/285:50 pm -
1 stop32h 11m
Deal found 9/22![American Airlines logo]()
$1,140
This FlightHub deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:30 am -
1 stop22h 20m
Sat 10/171:50 pm -
1 stop20h 55m
Deal found 9/19![EVA Air logo]()
$1,162
This BusinessClass deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am -
2 stops42h 05m
Sat 10/178:05 pm -
2 stops41h 18m
Deal found 9/19![Cathay Pacific logo]()
$1,136
This FlightHub deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:10 pm -
1 stop22h 25m
Fri 10/1610:25 am -
1 stop37h 15m
Deal found 9/21![Turkish Airlines logo]()
$989
This oojo deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1411:25 am -
1 stop31h 10m
Wed 10/2110:15 am -
1 stop46h 00m
Deal found 9/21![Turkish Airlines logo]()
$1,010
This FlightHub deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:15 am -
1 stop39h 45m
Thu 10/2912:05 am -
2 stops46h 35m
Deal found 9/20![Ethiopian Air logo]()
$857
This Justfly.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:15 am -
1 stop39h 30m
Mon 11/2312:05 am -
2 stops46h 35m
Deal found 9/19![Ethiopian Air logo]()
$905
This Justfly.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:45 pm -
1 stop30h 10m
Mon 11/2312:05 am -
1 stop24h 55m
Deal found 9/22![Turkish Airlines logo]()
$986
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:30 am -
2 stops32h 40m
Tue 11/248:30 pm -
1 stop35h 25m
Deal found 9/18![Multiple Airlines logo]()
$1,005
This Ethiopian Air deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ethiopian Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:15 am -
1 stop39h 30m
Mon 11/912:05 am -
2 stops46h 35m
Deal found 9/18![Ethiopian Air logo]()
$886
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:30 am -
2 stops24h 50m
Mon 11/97:30 am -
1 stop24h 25m
Deal found 9/18![Multiple Airlines logo]()
$1,011
This Trip.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:30 am -
2 stops24h 50m
Sun 11/158:30 pm -
1 stop35h 25m
Deal found 9/19![Multiple Airlines logo]()
$1,012
One-way flights from Illinois to SeoulSearch for one-way flight options from Illinois to Seoul. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from Illinois to Seoul. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:30 am -
2 stops23h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$421
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:00 am -
2 stops47h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Multiple Airlines logo]()
$450
This Kiwi.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:21 am -
2 stops23h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$457
This Kiwi.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:16 am -
2 stops32h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$461
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:30 am -
2 stops24h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$461
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:50 pm -
3 stops58h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Multiple Airlines logo]()
$462
This Kiwi.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:30 pm -
2 stops46h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:40 am -
2 stops44h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$471
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:30 am -
2 stops25h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$488
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:42 pm -
3 stops59h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Multiple Airlines logo]()
$489
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:16 am -
2 stops33h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$511
This Kiwi.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:20 pm -
3 stops51h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Multiple Airlines logo]()
$528
Find flight deals from Illinois to Seoul
Keep the following information in mind while searching for Illinois to Seoul flight deals. Data was last updated September 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $857 (FlightHub) |
One-way from | $421 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $1,242 |
Good round-trip deal | $908 or less |
Good one-way deal | $476 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Seoul that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 23, 2026.
Use the filters below to find and compare flights from Illinois to Seoul that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoIncheon
MDW Chicago Midway - ICN Incheon Intl
MDWICN
Chicago Midway
Mon 11/2
6:42 pm-5:40 am
2 stops43h 58m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$553
ChicagoIncheon
MDW Chicago Midway - ICN Incheon Intl
MDWICN
Chicago Midway
Sat 10/17
3:20 pm-5:30 am
2 stops48h 10m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$560
ChicagoIncheon
ORD Chicago O'Hare Intl - ICN Incheon Intl
ORDICN
Chicago O'Hare Intl
Thu 10/15
7:00 am-6:00 am
2 stops33h 00m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$573
ChicagoIncheon
ORD Chicago O'Hare Intl - ICN Incheon Intl
ORDICN
Chicago O'Hare Intl
Thu 10/1
6:55 am-6:00 am
2 stops33h 05m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$583
ChicagoIncheon
ORD Chicago O'Hare Intl - ICN Incheon Intl
ORDICN
Chicago O'Hare Intl
Wed 10/14
6:55 pm-7:15 pm
2 stops34h 20m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$583
SpringfieldIncheon
SPI Springfield Capital - ICN Incheon Intl
SPIICN
Springfield Capital
Sat 10/31
6:00 am-12:40 am
2 stops52h 40m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$605
ChicagoIncheon
ORD Chicago O'Hare Intl - ICN Incheon Intl
ORDICN
Chicago O'Hare Intl
Sun 10/4
8:25 pm-7:50 am
3 stops45h 25m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$606
ChicagoIncheon
ORD Chicago O'Hare Intl - ICN Incheon Intl
ORDICN
Chicago O'Hare Intl
Fri 12/4
5:29 pm-5:30 am
3 stops45h 01m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$621
ChicagoIncheon
MDW Chicago Midway - ICN Incheon Intl
MDWICN
Chicago Midway
Sun 11/15
6:42 pm-10:30 pm
3 stops36h 48m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$622
ChicagoIncheon
ORD Chicago O'Hare Intl - ICN Incheon Intl
ORDICN
Chicago O'Hare Intl
Mon 11/2
2:10 pm-6:35 pm
1 stop37h 25m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$644
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Seoul
Have a flexible travel schedule? Discover the best time to fly to Seoul from Illinois with our price prediction graph.
ORD-ICN
PIA-ICN
ORD-GMP
MLI-ICN
BMI-ICN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Seoul
USIL-SEL
ORD-ICN
PIA-ICN
ORD-GMP
MLI-ICN
What is the cheapest month to book a flight from Illinois to Seoul?
Currently, January is the cheapest month in which you can book a flight from Illinois to Seoul (average of $1,218). Flying from Illinois to Seoul in December is currently the most expensive (average of $1,815). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IL to SEL?
Find hourly flight availability from Illinois to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 23, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Seoul as you normally would.
Weekly flight availability from Illinois to Seoul
Explore weekly flight availability from Illinois to Seoul. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 23, 2026.
The most flights from USIL to SEL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Illinois to Seoul?
Airfare is below average for this route at the moment.
Illinois to Seoul flights typically cost between $1,004 and $1,712 in October.The cheapest round-trip price found within the last 5 days was $857 on Ethiopian Air (Oct 17-Oct 24).
How far ahead should I book a flight from Illinois to Seoul?
The price you pay for your flight from Illinois to Seoul may vary depending on when you book. For the best chance of a lower fare, look to book 22 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
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Popular flights
Seoul flight routes
Top destinations
Alternative routes for Illinois to Seoul
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Seoul by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Seoul by cabin class
Find flights from Illinois to Seoul, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Seoul flights
Browse other Illinois and Seoul flight options. Last updated on September 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seoul
Explore flights to Seoul departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 23, 2026.
Illinois to Seoul flights
Consider these flights traveling from Illinois to Seoul.
Top 10 airlines flying from Illinois to Seoul
Discover the top 10 airlines that operate flights from Illinois to Seoul. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$287 | Average$1,817 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$802 | Average$1,121 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$845 | Average$1,044 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$916 | Average$1,294 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$942 | Average$1,443 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$948 | Average$1,183 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,148 | Average$1,726 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$1,174 | Average$1,356 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$1,191 | Average$1,458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,464 | Average$1,614 | FlexibilityNo cancel fee | On-time67% |