$54+ Cheap flights from Baltimore (BWI) to Illinois
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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Mar 15 — Mar 221
1 adult, Economy
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Find cheap flights from Baltimore to Illinois with Cheapflights
1. Tell us where you want to go
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 Baltimore to IllinoisExplore the most affordable flight options available from Baltimore to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
Explore the most affordable flight options available from Baltimore to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
This Frontier deal was found by Cheapflights users on 2/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/164:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Sun 4/1912:25 pm
ORD
- BWI
Nonstop2h 05m
Frontier
Deal found 2/10![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 2/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Mon 5/412:25 pm
ORD
- BWI
Nonstop2h 05m
Frontier
Deal found 2/10![Frontier logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/74:25 pm
BWI
- ORD
Nonstop2h 26m
Multiple Airlines
Tue 5/121:27 pm
ORD
- BWI
1 stop9h 32m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/99:07 am
BWI
- ORD
1 stop6h 08m
Multiple Airlines
Mon 5/1112:25 pm
ORD
- BWI
Nonstop2h 05m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Tue 4/147:40 pm
BWI
- ORD
1 stop20h 37m
Multiple Airlines
Thu 4/1612:25 pm
ORD
- BWI
Nonstop2h 05m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$111
This Expedia deal was found by Cheapflights users on 2/10. 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.
Fri 4/103:42 pm
BWI
- ORD
Nonstop2h 23m
Frontier
Sun 5/1012:25 pm
ORD
- BWI
Nonstop2h 05m
Frontier
Deal found 2/10![Frontier logo]()
$112
This Frontier deal was found by Cheapflights users on 2/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Fri 5/84:28 pm
ORD
- BWI
1 stop7h 21m
Frontier
Deal found 2/10![Frontier logo]()
$113
This Expedia deal was found by Cheapflights users on 2/10. 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 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Multiple Airlines
Mon 3/28:16 pm
ORD
- BWI
1 stop11h 50m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/84:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Sun 5/1012:25 pm
ORD
- BWI
Nonstop2h 05m
Frontier
Deal found 2/10![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 2/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Mon 5/1112:25 pm
ORD
- BWI
Nonstop2h 05m
Frontier
Deal found 2/10![Frontier logo]()
$116
This Frontier deal was found by Cheapflights users on 2/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/103:42 pm
BWI
- ORD
Nonstop2h 23m
Frontier
Mon 4/136:15 am
ORD
- BWI
Nonstop2h 06m
Frontier
Deal found 2/11![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Frontier
Mon 3/24:42 pm
ORD
- BWI
1 stop6h 49m
Frontier
Deal found 2/10![Frontier logo]()
$119
Best flights from Baltimore to IllinoisDiscover carefully curated flight deals from Baltimore to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from Baltimore to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This Frontier deal was found by Cheapflights users on 2/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Sun 5/104:28 pm
ORD
- BWI
1 stop7h 21m
Frontier
Deal found 2/12![Frontier logo]()
$113
This Spirit deal was found by Cheapflights users on 2/9. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2612:30 pm
BWI
- ORD
1 stop7h 41m
Spirit Airlines
Thu 2/268:16 pm
ORD
- BWI
1 stop11h 50m
Spirit Airlines
Deal found 2/9![Spirit Airlines logo]()
$169
This Southwest deal was found by Cheapflights users on 2/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:05 am
BWI
- MDW
Nonstop2h 05m
Southwest
Sun 5/108:55 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 2/12![Southwest logo]()
$177
This United Airlines deal was found by Cheapflights users on 2/10. 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 5/86:15 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Fri 5/82:25 pm
ORD
- BWI
Nonstop2h 03m
United Airlines
Deal found 2/10![United Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 2/2512:30 pm
BWI
- RFD
1 stop22h 17m
Multiple Airlines
Sun 3/110:37 am
RFD
- BWI
1 stop21h 04m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$203
This Delta deal was found by Cheapflights users on 2/10. 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.
Sat 5/95:34 am
BWI
- MDW
1 stop5h 17m
Delta
Sat 5/96:36 pm
MDW
- BWI
1 stop3h 41m
Delta
Deal found 2/10![Delta logo]()
$207
This American Airlines deal was found by Cheapflights users on 2/11. 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 2/265:00 am
BWI
- BMI
1 stop7h 01m
American Airlines
Mon 3/22:56 pm
BMI
- BWI
1 stop5h 57m
American Airlines
Deal found 2/11![American Airlines logo]()
$279
This United Airlines deal was found by Cheapflights users on 2/12. 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 5/56:15 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Thu 5/711:10 am
ORD
- BWI
Nonstop2h 03m
United Airlines
Deal found 2/12![United Airlines logo]()
$177
This CheapOair deal was found by Cheapflights users on 2/11. 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.
Sat 2/2810:06 am
BWI
- ORD
1 stop10h 05m
Spirit Airlines
Sun 3/18:16 pm
ORD
- BWI
1 stop11h 50m
Spirit Airlines
Deal found 2/11![Spirit Airlines logo]()
$191
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Wed 4/296:00 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Fri 5/17:01 am
ORD
- BWI
Nonstop2h 03m
United Airlines
Deal found 2/12![United Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 2/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/178:35 am
BWI
- MDW
Nonstop2h 15m
Southwest
Tue 3/175:40 pm
MDW
- BWI
Nonstop1h 45m
Southwest
Deal found 2/11![Southwest logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 4/236:05 am
BWI
- STL
2 stops14h 07m
Frontier
Sat 4/258:13 pm
STL
- BWI
1 stop10h 59m
Frontier
Deal found 2/10![Frontier logo]()
$202
This Delta deal was found by Cheapflights users on 2/12. 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 3/312:38 pm
BWI
- ORD
1 stop5h 15m
Delta
Tue 4/75:40 pm
ORD
- BWI
1 stop4h 21m
Delta
Deal found 2/12![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 2/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/157:35 am
BWI
- MDW
Nonstop2h 10m
Southwest
Tue 3/175:40 pm
MDW
- BWI
Nonstop1h 45m
Southwest
Deal found 2/11![Southwest logo]()
$207
This CheapOair deal was found by Cheapflights users on 2/12. 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.
Fri 4/175:35 pm
BWI
- STL
1 stop6h 44m
Frontier
Sun 4/194:55 pm
STL
- BWI
1 stop26h 53m
Frontier
Deal found 2/12![Frontier logo]()
$213
This United Airlines deal was found by Cheapflights users on 2/11. 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 3/178:09 am
BWI
- ORD
Nonstop2h 23m
United Airlines
Tue 3/176:40 pm
ORD
- BWI
Nonstop2h 02m
United Airlines
Deal found 2/11![United Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 2/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:05 am
BWI
- MDW
Nonstop2h 05m
Southwest
Sat 4/189:05 am
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 2/10![Southwest logo]()
$211
This Delta deal was found by Cheapflights users on 2/12. 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 3/247:14 pm
BWI
- STL
1 stop5h 44m
Delta
Tue 4/1411:43 am
STL
- BWI
1 stop5h 31m
Delta
Deal found 2/12![Delta logo]()
$245
This United Airlines deal was found by Cheapflights users on 2/11. 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 3/146:05 am
BWI
- ORD
Nonstop2h 23m
United Airlines
Tue 3/176:40 pm
ORD
- BWI
Nonstop2h 02m
United Airlines
Deal found 2/11![United Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 2/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/57:35 am
BWI
- MDW
Nonstop2h 10m
Southwest
Fri 4/107:10 am
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 2/12![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Tue 2/247:54 pm
BWI
- SPI
1 stop14h 32m
Multiple Airlines
Sat 2/2810:06 am
SPI
- BWI
2 stops13h 30m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$294
This Delta deal was found by Cheapflights users on 2/11. 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.
Sat 3/215:40 am
BWI
- STL
1 stop5h 06m
Delta
Sat 3/285:00 pm
STL
- BWI
1 stop6h 53m
Delta
Deal found 2/11![Delta logo]()
$245
This American Airlines deal was found by Cheapflights users on 2/12. 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.
Fri 3/137:54 pm
BWI
- PIA
1 stop5h 02m
American Airlines
Mon 3/166:50 pm
PIA
- BWI
1 stop4h 00m
American Airlines
Deal found 2/12![American Airlines logo]()
$304
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Thu 4/236:00 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Sat 4/2511:30 am
ORD
- BWI
Nonstop2h 02m
United Airlines
Deal found 2/10![United Airlines logo]()
$211
This Southwest deal was found by Cheapflights users on 2/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:05 am
BWI
- MDW
Nonstop2h 05m
Southwest
Sun 4/268:55 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 2/12![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 2/12. 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 4/95:40 am
BWI
- STL
1 stop5h 06m
Delta
Mon 4/135:59 pm
STL
- BWI
1 stop3h 58m
Delta
Deal found 2/12![Delta logo]()
$245
This American Airlines deal was found by Cheapflights users on 2/9. 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.
Tue 2/246:55 am
BWI
- MLI
2 stops9h 08m
American Airlines
Sat 2/282:02 pm
MLI
- BWI
1 stop6h 59m
American Airlines
Deal found 2/9![American Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 2/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:30 am
BWI
- MDW
Nonstop2h 05m
Southwest
Thu 4/3010:25 am
MDW
- BWI
1 stop4h 35m
Southwest
Deal found 2/12![Southwest logo]()
$221
This Delta deal was found by Cheapflights users on 2/12. 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 4/15:40 am
BWI
- STL
1 stop5h 06m
Delta
Tue 4/146:48 am
STL
- BWI
1 stop3h 53m
Delta
Deal found 2/12![Delta logo]()
$245
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 2/236:30 am
BWI
- ORD
Nonstop2h 23m
United Airlines
Tue 2/246:15 pm
ORD
- BWI
Nonstop2h 02m
United Airlines
Deal found 2/9![United Airlines logo]()
$229
Last-minute flights from Baltimore to IllinoisDiscover last-minute flight deals from Baltimore to Illinois. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Illinois. Data last updated February 13, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 2/10. 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 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Multiple Airlines
Mon 3/28:16 pm
ORD
- BWI
1 stop11h 50m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Frontier
Mon 3/24:42 pm
ORD
- BWI
1 stop6h 49m
Frontier
Deal found 2/10![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 2/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Frontier
Fri 2/272:13 pm
ORD
- BWI
1 stop8h 23m
Frontier
Deal found 2/12![Frontier logo]()
$120
This Booking.com deal was found by Cheapflights users on 2/10. 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.
Thu 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Frontier
Sun 3/16:05 pm
ORD
- BWI
Nonstop2h 09m
Frontier
Deal found 2/10![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 2/269:19 am
BWI
- ORD
Nonstop2h 27m
Multiple Airlines
Sun 3/18:16 pm
ORD
- BWI
1 stop11h 50m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 2/2812:30 pm
BWI
- ORD
1 stop7h 41m
Multiple Airlines
Thu 3/55:15 am
ORD
- BWI
Nonstop2h 09m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$122
This Frontier deal was found by Cheapflights users on 2/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/22:58 pm
BWI
- ORD
1 stop9h 17m
Frontier
Thu 3/55:15 am
ORD
- BWI
Nonstop2h 09m
Frontier
Deal found 2/12![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 3/46:00 am
BWI
- MDW
1 stop14h 07m
Frontier
Wed 3/116:05 am
MDW
- BWI
1 stop7h 19m
Frontier
Deal found 2/9![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 2/12. 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.
Thu 3/59:19 am
BWI
- ORD
Nonstop2h 27m
Frontier
Fri 3/612:34 pm
ORD
- BWI
Nonstop2h 09m
Frontier
Deal found 2/12![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 3/74:53 pm
BWI
- MDW
1 stop6h 31m
Frontier
Tue 3/106:00 am
MDW
- BWI
1 stop7h 24m
Frontier
Deal found 2/9![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/103:19 pm
BWI
- MDW
1 stop6h 35m
Frontier
Thu 3/126:05 am
MDW
- BWI
1 stop7h 19m
Frontier
Deal found 2/10![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 2/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/234:32 pm
BWI
- ORD
Nonstop2h 27m
Frontier
Thu 4/21:19 pm
ORD
- BWI
Nonstop2h 05m
Frontier
Deal found 2/10![Frontier logo]()
$108
One-way flights from Baltimore to IllinoisSearch for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This Frontier deal was found by Cheapflights users on 2/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/234:32 pm
BWI
- ORD
Nonstop2h 27m
Frontier
Deal found 2/10![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/103:19 pm
BWI
- ORD
1 stop18h 04m
Frontier
Deal found 2/10![Frontier logo]()
$55
This Trip.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/106:05 am
BWI
- MDW
1 stop15h 49m
Frontier
Deal found 2/10![Frontier logo]()
$56
This Southwest deal was found by Cheapflights users on 2/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:10 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Deal found 2/9![Southwest logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Sun 5/34:25 pm
BWI
- ORD
Nonstop2h 26m
Frontier
Deal found 2/11![Frontier logo]()
$57
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/412:30 pm
BWI
- ORD
1 stop7h 41m
Spirit Airlines
Deal found 2/10![Spirit Airlines logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/99:38 am
BWI
- MDW
1 stop7h 35m
Frontier
Deal found 2/10![Frontier logo]()
$59
This Trip.com deal was found by Cheapflights users on 2/12. 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 3/165:31 am
BWI
- STL
1 stop9h 03m
Frontier
Deal found 2/12![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 5/85:35 pm
BWI
- MDW
1 stop23h 38m
Frontier
Deal found 2/12![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/15:35 pm
BWI
- ORD
1 stop22h 50m
Frontier
Deal found 2/10![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 3/116:05 am
BWI
- STL
1 stop5h 32m
Frontier
Deal found 2/9![Frontier logo]()
$61
This Trip.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/173:19 pm
BWI
- MDW
1 stop6h 35m
Frontier
Deal found 2/10![Frontier logo]()
$61
Find flight deals from Baltimore to Illinois
Keep the following information in mind while searching for Baltimore to Illinois flight deals. Data was last updated February 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $107 (Frontier) |
One-way from | $54 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $237 |
Cheapflights Fare Finder
Customize your flight search to find flights from Baltimore to Illinois 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 February 13, 2026.
Use the filters below to find and compare flights from Baltimore to Illinois that are best for you.
Fly from
Baltimore
Fly to
Illinois
Route
Depart
Return
Price
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Thu 5/7
4:25 pm-5:51 pm
Nonstop2h 26m
Chicago O'Hare Intl
Sun 5/10
4:28 pm-12:49 am
1 stop7h 21m
$113
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Thu 2/26
12:30 pm-7:11 pm
1 stop7h 41m
Chicago O'Hare Intl
Thu 2/26
8:16 pm-9:06 am
1 stop11h 50m
$169
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Fri 5/8
6:05 am-7:10 am
Nonstop2h 05m
Chicago Midway
Sun 5/10
8:55 pm-11:45 pm
Nonstop1h 50m
$177
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Fri 5/8
6:15 am-7:36 am
Nonstop2h 21m
Chicago O'Hare Intl
Fri 5/8
2:25 pm-5:28 pm
Nonstop2h 03m
$177
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 5/5
6:15 am-7:36 am
Nonstop2h 21m
Chicago O'Hare Intl
Thu 5/7
11:10 am-2:13 pm
Nonstop2h 03m
$177
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Wed 4/29
6:00 am-7:21 am
Nonstop2h 21m
Chicago O'Hare Intl
Fri 5/1
7:01 am-10:04 am
Nonstop2h 03m
$177
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Sat 2/28
10:06 am-7:11 pm
1 stop10h 05m
Chicago O'Hare Intl
Sun 3/1
8:16 pm-9:06 am
1 stop11h 50m
$191
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Tue 3/17
8:35 am-9:50 am
Nonstop2h 15m
Chicago Midway
Tue 3/17
5:40 pm-8:25 pm
Nonstop1h 45m
$197
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 3/17
8:09 am-9:32 am
Nonstop2h 23m
Chicago O'Hare Intl
Tue 3/17
6:40 pm-9:42 pm
Nonstop2h 02m
$197
BaltimoreSt. Louis
BWI - STL
BWISTL
Baltimore/Washington
Thu 4/23
6:05 am-7:12 pm
2 stops14h 07m
Lambert-St Louis
Sat 4/25
8:13 pm-8:12 am
1 stop10h 59m
$202
Showing 1-10 of 60 results
Best time to book a flight from Baltimore to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Baltimore with our price prediction graph.
BWI-MDW
BWI-ORD
BWI-STL
BWI-RFD
BWI-BMI
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 Baltimore to Illinois
BWI-USIL
BWI-MDW
BWI-ORD
BWI-STL
BWI-RFD
What is the cheapest month to book a flight from Baltimore to Illinois?
Currently, March is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $49). Flying from Baltimore to Illinois in June is currently the most expensive (average of $133). 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 BWI to IL?
Find hourly flight availability from Baltimore to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 13, 2026.
When flying from Baltimore to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 42% versus a flight in the morning.
What is the cheapest day to fly from Baltimore to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Baltimore to Illinois. Price data was last updated on February 7, 2026.
Travelers seeking maximum savings on their Baltimore to Illinois flight should consider departing on Monday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Baltimore to Illinois
Explore weekly flight availability from Baltimore to Illinois. 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 February 13, 2026.
The most flights from BWI to USIL are scheduled on a Thursday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated February 13, 2026.
Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Baltimore to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Baltimore to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Baltimore to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Baltimore to Illinois by cabin class
Find flights from Baltimore to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Baltimore and Illinois flights
Browse other Baltimore and Illinois flight options. Last updated on February 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Baltimore to Illinois flights
Consider these flights traveling from Baltimore to Illinois.
Top 6 airlines flying from Baltimore to Illinois
Discover the top 6 airlines that operate flights from Baltimore to Illinois. 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 February 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$41 | Average$114 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$57 | Average$161 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$131 | Average$320 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$148 | Average$290 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$395 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$239 | Average$442 | FlexibilityNo cancel fee | On-timeN/A |