$392+ Cheap flights from Illinois to Seoul (SEL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEL
Jul 6 — Jul 131
Round-trip
1 adult, Economy
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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 June 6, 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 June 6, 2026.
This KAYAK deal was found by Cheapflights users on 6/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:00 am
MLI
- ICN
2 stops42h 05m
Cathay Pacific
Tue 10/68:00 am
ICN
- MLI
2 stops23h 42m
Cathay Pacific
Deal found 6/4![Cathay Pacific logo]()
$1,112
This KAYAK deal was found by Cheapflights users on 6/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:00 am
MLI
- ICN
2 stops42h 05m
Cathay Pacific
Wed 10/78:00 am
ICN
- MLI
2 stops23h 42m
Cathay Pacific
Deal found 6/2![Cathay Pacific logo]()
$1,113
This KAYAK deal was found by Cheapflights users on 6/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/274:57 pm
MLI
- ICN
2 stops60h 08m
Cathay Pacific
Tue 10/68:00 am
ICN
- MLI
2 stops23h 42m
Cathay Pacific
Deal found 6/4![Cathay Pacific logo]()
$1,118
This Cathay Pacific deal was found by Cheapflights users on 6/5. 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.
Mon 9/286:00 am
MLI
- ICN
2 stops40h 40m
Multiple Airlines
Wed 10/78:00 am
ICN
- MLI
2 stops29h 25m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,143
This Ovago deal was found by Cheapflights users on 6/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:55 pm
STL
- ICN
2 stops38h 50m
WestJet
Fri 9/258:45 pm
ICN
- STL
2 stops26h 49m
WestJet
Deal found 6/3![WestJet logo]()
$1,151
This KAYAK deal was found by Cheapflights users on 6/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:43 am
MLI
- ICN
2 stops46h 42m
Cathay Pacific
Sat 9/58:00 am
ICN
- MLI
2 stops24h 11m
Cathay Pacific
Deal found 6/5![Cathay Pacific logo]()
$1,162
This oojo deal was found by Cheapflights users on 6/5. 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.
Sun 10/184:15 pm
ORD
- ICN
1 stop23h 15m
Cathay Pacific
Wed 10/281:45 pm
ICN
- ORD
1 stop38h 10m
Cathay Pacific
Deal found 6/5![Cathay Pacific logo]()
$1,175
This KAYAK deal was found by Cheapflights users on 6/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:15 pm
ORD
- ICN
1 stop36h 50m
Cathay Pacific
Thu 10/81:40 pm
ICN
- ORD
1 stop38h 15m
Cathay Pacific
Deal found 6/6![Cathay Pacific logo]()
$1,176
This Trip.com deal was found by Cheapflights users on 6/4. 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.
Mon 8/310:16 am
ORD
- ICN
2 stops28h 14m
Multiple Airlines
Fri 8/710:05 pm
ICN
- ORD
1 stop22h 12m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$1,177
This KAYAK deal was found by Cheapflights users on 6/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 am
MLI
- ICN
2 stops40h 40m
Cathay Pacific
Wed 10/78:00 am
ICN
- MLI
2 stops23h 42m
Cathay Pacific
Deal found 6/5![Cathay Pacific logo]()
$1,177
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 8/274:00 pm
ORD
- ICN
1 stop23h 30m
Cathay Pacific
Sat 9/128:00 am
ICN
- ORD
1 stop20h 20m
Cathay Pacific
Deal found 6/5![Cathay Pacific logo]()
$1,178
This KAYAK deal was found by Cheapflights users on 6/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:15 pm
ORD
- ICN
1 stop31h 50m
Cathay Pacific
Tue 10/208:00 am
ICN
- ORD
1 stop19h 55m
Cathay Pacific
Deal found 6/6![Cathay Pacific logo]()
$1,179
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 June 6, 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 June 6, 2026.
This Cathay Pacific deal was found by Cheapflights users on 6/2. 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.
Tue 9/2910:14 am
STL
- ICN
2 stops36h 26m
Multiple Airlines
Wed 10/78:00 am
ICN
- STL
2 stops29h 59m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,183
This EVA Air deal was found by Cheapflights users on 6/5. 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.
Thu 8/2712:30 am
ORD
- GMP
1 stop22h 20m
EVA Air
Wed 9/98:20 pm
GMP
- ORD
1 stop38h 25m
EVA Air
Deal found 6/5![EVA Air logo]()
$1,331
This Delta deal was found by Cheapflights users on 6/1. 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 7/306:00 am
STL
- ICN
1 stop18h 10m
Delta
Thu 8/206:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 6/1![Delta logo]()
$1,420
This Alaska Airlines deal was found by Cheapflights users on 6/4. 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 9/106:00 am
STL
- ICN
1 stop21h 30m
Alaska Airlines
Mon 9/147:35 pm
ICN
- STL
1 stop18h 24m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$1,420
This United Airlines deal was found by Cheapflights users on 6/5. 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 11/15:42 pm
MLI
- ICN
2 stops31h 33m
United Airlines
Fri 11/1312:45 pm
ICN
- MLI
2 stops20h 06m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,510
This oojo deal was found by Cheapflights users on 6/1. 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 8/52:47 pm
CMI
- ICN
2 stops31h 53m
Cathay Pacific
Sat 8/151:40 pm
ICN
- CMI
2 stops46h 20m
Cathay Pacific
Deal found 6/1![Cathay Pacific logo]()
$1,540
This Japan Airlines deal was found by Cheapflights users on 6/5. 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.
Wed 8/199:32 am
STL
- GMP
2 stops21h 43m
Japan Airlines
Sun 8/237:15 pm
GMP
- STL
2 stops41h 44m
Japan Airlines
Deal found 6/5![Japan Airlines logo]()
$1,556
This Finnair deal was found by Cheapflights users on 6/4. 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.
Tue 8/254:30 pm
ORD
- ICN
2 stops28h 50m
Finnair
Tue 11/1711:00 pm
ICN
- ORD
2 stops35h 42m
Finnair
Deal found 6/4![Finnair logo]()
$1,777
This American Airlines deal was found by Cheapflights users on 6/4. 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.
Wed 8/57:00 am
CMI
- ICN
1 stop18h 45m
American Airlines
Sat 8/155:50 pm
ICN
- CMI
2 stops31h 21m
American Airlines
Deal found 6/4![American Airlines logo]()
$1,787
This Qatar Airways deal was found by Cheapflights users on 6/4. 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 9/92:41 pm
CMI
- ICN
2 stops29h 49m
Qatar Airways
Sat 9/121:20 am
ICN
- CMI
2 stops34h 45m
Qatar Airways
Deal found 6/4![Qatar Airways logo]()
$1,918
This Cathay Pacific deal was found by Cheapflights users on 6/5. 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.
Tue 11/246:13 pm
STL
- ICN
2 stops28h 42m
Multiple Airlines
Fri 12/43:00 pm
ICN
- STL
2 stops23h 57m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,318
This Delta deal was found by Cheapflights users on 6/2. 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 8/26:58 pm
STL
- ICN
1 stop29h 12m
Delta
Tue 8/187:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/2![Delta logo]()
$1,420
This FlightHub deal was found by Cheapflights users on 6/6. 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 11/13:11 pm
STL
- GMP
2 stops35h 49m
Multiple Airlines
Sat 11/141:50 pm
GMP
- STL
2 stops49h 06m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$1,346
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Sat 10/315:42 pm
MLI
- ICN
2 stops20h 58m
United Airlines
Fri 11/1312:45 pm
ICN
- MLI
2 stops20h 06m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,560
This Delta deal was found by Cheapflights users on 6/5. 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 7/286:00 am
STL
- ICN
2 stops20h 25m
Delta
Thu 8/206:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 6/5![Delta logo]()
$1,424
This Japan Airlines deal was found by Cheapflights users on 6/3. 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.
Thu 9/102:10 pm
ORD
- GMP
1 stop17h 05m
Japan Airlines
Mon 9/1412:05 pm
GMP
- ORD
1 stop36h 40m
Japan Airlines
Deal found 6/3![Japan Airlines logo]()
$1,630
This China Airlines deal was found by Cheapflights users on 6/2. 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 9/56:54 pm
ORD
- ICN
2 stops26h 36m
Multiple Airlines
Sun 9/138:05 pm
ICN
- ORD
2 stops24h 15m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,383
This Delta deal was found by Cheapflights users on 6/1. 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 7/296:21 am
STL
- ICN
2 stops20h 29m
Delta
Tue 8/187:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/1![Delta logo]()
$1,425
This Japan Airlines deal was found by Cheapflights users on 6/5. 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 8/302:30 pm
ORD
- GMP
1 stop16h 45m
Japan Airlines
Tue 9/88:00 am
GMP
- ORD
1 stop16h 45m
Japan Airlines
Deal found 6/5![Japan Airlines logo]()
$1,680
This China Airlines deal was found by Cheapflights users on 6/5. 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.
Mon 10/55:46 pm
ORD
- ICN
2 stops27h 29m
Multiple Airlines
Thu 11/58:15 pm
ICN
- ORD
2 stops24h 25m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,407
This EVA Air deal was found by Cheapflights users on 6/2. 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.
Thu 6/2512:30 am
ORD
- GMP
1 stop22h 20m
EVA Air
Sat 7/41:50 pm
GMP
- ORD
1 stop21h 20m
EVA Air
Deal found 6/2![EVA Air logo]()
$1,891
This Delta deal was found by Cheapflights users on 6/4. 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 7/265:36 pm
STL
- ICN
1 stop33h 44m
Delta
Wed 8/127:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/4![Delta logo]()
$1,425
This Japan Airlines deal was found by Cheapflights users on 6/5. 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 8/302:30 pm
ORD
- GMP
1 stop16h 45m
Japan Airlines
Mon 9/78:00 am
GMP
- ORD
1 stop16h 45m
Japan Airlines
Deal found 6/5![Japan Airlines logo]()
$1,680
This Delta deal was found by Cheapflights users on 6/5. 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 7/296:21 am
STL
- ICN
1 stop20h 59m
Delta
Tue 8/47:40 pm
ICN
- STL
1 stop28h 43m
Delta
Deal found 6/5![Delta logo]()
$1,425
This EVA Air deal was found by Cheapflights users on 6/3. 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.
Mon 9/288:45 pm
MDW
- ICN
2 stops24h 15m
Multiple Airlines
Thu 10/87:45 pm
ICN
- MDW
2 stops24h 20m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,456
This EVA Air deal was found by Cheapflights users on 6/2. 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.
Thu 6/2512:30 am
ORD
- GMP
1 stop22h 20m
EVA Air
Fri 7/101:50 pm
GMP
- ORD
1 stop21h 20m
EVA Air
Deal found 6/2![EVA Air logo]()
$1,976
This Delta deal was found by Cheapflights users on 6/3. 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 7/286:21 am
STL
- ICN
2 stops20h 29m
Delta
Sun 8/167:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/3![Delta logo]()
$1,425
This EVA Air deal was found by Cheapflights users on 6/6. 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 8/308:45 pm
MDW
- ICN
2 stops24h 15m
Multiple Airlines
Thu 9/107:45 pm
ICN
- MDW
2 stops24h 10m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$1,456
This Expedia deal was found by Cheapflights users on 6/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:30 am
STL
- GMP
2 stops24h 45m
Japan Airlines
Mon 10/268:00 am
GMP
- STL
2 stops29h 05m
Japan Airlines
Deal found 6/2![Japan Airlines logo]()
$1,763
This Delta deal was found by Cheapflights users on 6/2. 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 9/285:10 pm
MLI
- ICN
1 stop20h 50m
Delta
Thu 10/87:00 pm
ICN
- MLI
2 stops29h 26m
Delta
Deal found 6/2![Delta logo]()
$1,461
Last-minute flights from Illinois to SeoulDiscover last-minute flight deals from Illinois to Seoul. Data last updated June 6, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Seoul. Data last updated June 6, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 6/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/119:30 pm
ORD
- ICN
1 stop23h 50m
Finnair
Tue 6/239:50 pm
ICN
- ORD
1 stop34h 00m
Finnair
Deal found 6/5![Finnair logo]()
$1,213
This oojo deal was found by Cheapflights users on 6/6. 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.
Tue 6/169:30 pm
ORD
- ICN
1 stop23h 50m
Finnair
Tue 6/239:50 pm
ICN
- ORD
1 stop34h 00m
Finnair
Deal found 6/6![Finnair logo]()
$1,260
This Gotogate deal was found by Cheapflights users on 6/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/64:00 pm
ORD
- ICN
1 stop32h 05m
Cathay Pacific
Tue 9/13:10 pm
ICN
- ORD
1 stop37h 10m
Cathay Pacific
Deal found 6/2![Cathay Pacific logo]()
$1,285
This Travelocity deal was found by Cheapflights users on 6/6. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/119:30 pm
ORD
- ICN
1 stop23h 50m
Finnair
Wed 7/229:50 pm
ICN
- ORD
1 stop34h 00m
Finnair
Deal found 6/6![Finnair logo]()
$1,282
This Finnair deal was found by Cheapflights users on 6/4. 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 7/159:30 pm
ORD
- ICN
1 stop23h 50m
Finnair
Wed 7/229:50 pm
ICN
- ORD
1 stop34h 00m
Finnair
Deal found 6/4![Finnair logo]()
$1,222
This Trip.com deal was found by Cheapflights users on 6/2. 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.
Mon 7/2010:16 am
ORD
- ICN
2 stops28h 14m
Multiple Airlines
Mon 8/310:05 pm
ICN
- ORD
1 stop22h 12m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,186
This Trip.com deal was found by Cheapflights users on 6/2. 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.
Mon 7/206:05 am
MDW
- ICN
2 stops32h 25m
Multiple Airlines
Mon 8/310:05 pm
ICN
- MDW
2 stops27h 02m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,309
This Trip.com deal was found by Cheapflights users on 6/3. 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.
Mon 7/279:28 am
ORD
- ICN
2 stops29h 02m
Multiple Airlines
Thu 8/201:00 pm
ICN
- ORD
1 stop31h 19m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,201
This Trip.com deal was found by Cheapflights users on 6/3. 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.
Mon 7/276:05 am
MDW
- ICN
2 stops32h 25m
Multiple Airlines
Thu 8/201:00 pm
ICN
- MDW
2 stops36h 09m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,276
This Cathay Pacific deal was found by Cheapflights users on 6/1. 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.
Tue 7/286:37 am
STL
- ICN
2 stops27h 48m
Multiple Airlines
Tue 8/188:00 am
ICN
- STL
2 stops29h 42m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$1,418
This Trip.com deal was found by Cheapflights users on 6/5. 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.
Thu 7/308:08 pm
STL
- ICN
2 stops29h 42m
Multiple Airlines
Mon 8/310:05 pm
ICN
- STL
2 stops34h 00m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,197
This Delta deal was found by Cheapflights users on 6/1. 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 7/301:22 pm
STL
- ICN
1 stop24h 38m
Delta
Fri 8/217:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/1![Delta logo]()
$1,420
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 June 6, 2026.
Search for one-way flight options from Illinois to Seoul. Find affordable one-way fares based on user searches. Data last updated June 6, 2026.
This CheapOair deal was found by Cheapflights users on 6/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/5![WestJet logo]()
$392
This Booking.com deal was found by Cheapflights users on 6/5. 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.
Sat 8/225:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/5![WestJet logo]()
$395
This Super.com deal was found by Cheapflights users on 6/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/195:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/3![WestJet logo]()
$396
This Mytrip deal was found by Cheapflights users on 6/6. 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.
Thu 8/275:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/6![WestJet logo]()
$398
This Mytrip deal was found by Cheapflights users on 6/5. 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.
Tue 8/185:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/5![WestJet logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 8/125:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/6![WestJet logo]()
$403
This Justfly.com deal was found by Cheapflights users on 6/6. 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.
Tue 8/115:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/6![WestJet logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/135:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/3![WestJet logo]()
$411
This Mytrip deal was found by Cheapflights users on 6/3. 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.
Sat 8/85:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/3![WestJet logo]()
$416
This Mytrip deal was found by Cheapflights users on 6/2. 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 8/265:30 pm
ORD
- ICN
1 stop35h 15m
WestJet
Deal found 6/2![WestJet logo]()
$417
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/228:08 pm
STL
- ICN
2 stops32h 37m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$449
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/196:00 am
MDW
- ICN
2 stops46h 45m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$459
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 June 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,112 (KAYAK) |
One-way from | $392 (CheapOair) |
Popular in | December |
Cheapest in | January |
Average price | $1,529 |
Good round-trip deal | $953 or less |
Good one-way deal | $630 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 2,558,603 searches. Data last updated June 6, 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
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 9/29
10:14 am-12:40 pm
2 stops36h 26m
Incheon Intl
Wed 10/7
8:00 am-11:59 pm
2 stops29h 59m
$1,183
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 11/24
6:13 pm-1:55 pm
2 stops28h 42m
Incheon Intl
Fri 12/4
3:00 pm-11:57 pm
2 stops23h 57m
$1,318
ChicagoSeoul
ORD - GMP
ORDGMP
Chicago O'Hare Intl
Thu 8/27
12:30 am-12:50 pm
1 stop22h 20m
Seoul Gimpo Intl
Wed 9/9
8:20 pm-8:45 pm
1 stop38h 25m
$1,331
St. LouisSeoul
STL - GMP
STLGMP
Lambert-St Louis
Sun 11/1
3:11 pm-6:00 pm
2 stops35h 49m
Seoul Gimpo Intl
Sat 11/14
1:50 pm-11:56 pm
2 stops49h 06m
$1,346
ChicagoIncheon
ORD - ICN
ORDICN
Chicago O'Hare Intl
Sat 9/5
6:54 pm-11:30 am
2 stops26h 36m
Incheon Intl
Sun 9/13
8:05 pm-6:20 am
2 stops24h 15m
$1,383
ChicagoIncheon
ORD - ICN
ORDICN
Chicago O'Hare Intl
Mon 10/5
5:46 pm-11:15 am
2 stops27h 29m
Incheon Intl
Thu 11/5
8:15 pm-5:40 am
2 stops24h 25m
$1,407
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 7/30
6:00 am-2:10 pm
1 stop18h 10m
Incheon Intl
Thu 8/20
6:50 pm-8:08 am
1 stop27h 18m
$1,420
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 9/10
6:00 am-5:30 pm
1 stop21h 30m
Incheon Intl
Mon 9/14
7:35 pm-11:59 pm
1 stop18h 24m
$1,420
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 8/2
6:58 pm-2:10 pm
1 stop29h 12m
Incheon Intl
Tue 8/18
7:20 pm-12:41 am
1 stop19h 21m
$1,420
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 7/28
6:00 am-4:25 pm
2 stops20h 25m
Incheon Intl
Thu 8/20
6:50 pm-8:08 am
1 stop27h 18m
$1,424
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
STL-ICN
MDW-ICN
ORD-GMP
MLI-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
STL-ICN
MDW-ICN
ORD-GMP
What is the cheapest month to book a flight from Illinois to Seoul?
Currently, March is the cheapest month in which you can book a flight from Illinois to Seoul (average of $130). Flying from Illinois to Seoul in November is currently the most expensive (average of $639). 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 June 6, 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 June 6, 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?
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.
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Complete your trip
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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 June 6, 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 June 6, 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 2,558,603 searches. Data last updated June 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$194 | Average$1,832 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$639 | Average$893 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$845 | Average$1,097 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$916 | Average$1,297 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$931 | Average$1,443 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$948 | Average$1,237 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,088 | Average$1,412 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,148 | Average$1,618 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$1,174 | Average$1,356 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$1,191 | Average$1,542 | FlexibilityNo cancel fee | On-time69% |