$74+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Jul 24 — Jul 311
Round-trip
1 adult, Economy
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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 June 24, 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 June 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Sat 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/23![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Sat 8/14:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/23![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Tue 7/289:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Fri 7/314:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/22![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/159:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Mon 8/174:57 pm
STL
- BWI
1 stop18h 27m
Frontier
Deal found 6/23![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Wed 7/229:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Tue 8/46:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/20![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 7/159:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/19![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Thu 10/89:29 pm
BWI
- STL
1 stop13h 11m
Frontier
Mon 10/1210:35 am
STL
- BWI
1 stop21h 22m
Frontier
Deal found 6/22![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Sat 7/117:21 pm
BWI
- STL
1 stop23h 16m
Frontier
Mon 7/134:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/19![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 8/66:35 am
BWI
- STL
1 stop12h 02m
Frontier
Mon 8/104:57 pm
STL
- BWI
1 stop21h 37m
Frontier
Deal found 6/20![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Sat 7/187:21 pm
BWI
- STL
1 stop23h 16m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/20![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/88:25 am
BWI
- ORD
1 stop12h 28m
Frontier
Mon 8/101:50 pm
ORD
- BWI
1 stop16h 36m
Frontier
Deal found 6/23![Frontier logo]()
$232
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:10 pm
BWI
- MDW
1 stop5h 00m
Delta
Tue 11/105:25 pm
MDW
- BWI
1 stop6h 01m
Delta
Deal found 6/22![Delta logo]()
$234
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 June 24, 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 June 24, 2026.
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:39 pm
BWI
- ORD
1 stop5h 31m
Delta
Tue 11/109:30 am
ORD
- BWI
1 stop6h 33m
Delta
Deal found 6/22![Delta logo]()
$234
This Southwest deal was found by Cheapflights users on 6/23. 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 8/1510:50 am
BWI
- MDW
1 stop3h 15m
Southwest
Sat 8/2211:45 am
MDW
- BWI
1 stop3h 15m
Southwest
Deal found 6/23![Southwest logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/81:05 pm
BWI
- RFD
1 stop22h 32m
Multiple Airlines
Sun 7/1211:27 am
RFD
- BWI
1 stop23h 43m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$253
This Frontier deal was found by Cheapflights users on 6/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/189:37 pm
BWI
- ORD
1 stop11h 16m
Frontier
Sat 7/257:05 am
ORD
- BWI
1 stop10h 28m
Frontier
Deal found 6/18![Frontier logo]()
$258
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:32 pm
BWI
- ORD
Nonstop2h 23m
United Airlines
Sat 7/186:26 pm
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 6/19![United Airlines logo]()
$273
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Wed 7/228:13 pm
BWI
- MLI
1 stop5h 28m
American Airlines
Sat 7/256:50 pm
MLI
- BWI
1 stop4h 26m
American Airlines
Deal found 6/18![American Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 6/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/275:05 pm
BWI
- MDW
1 stop4h 15m
Southwest
Wed 7/298:10 am
MDW
- BWI
Nonstop2h 00m
Southwest
Deal found 6/21![Southwest logo]()
$249
This Delta deal was found by Cheapflights users on 6/21. 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.
Sat 7/186:50 pm
BWI
- ORD
1 stop6h 03m
Delta
Thu 7/238:52 am
ORD
- BWI
1 stop6h 49m
Delta
Deal found 6/21![Delta logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Sat 8/11:05 pm
BWI
- RFD
1 stop22h 32m
Multiple Airlines
Mon 8/37:50 pm
RFD
- BWI
2 stops18h 44m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 6/23. 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.
Mon 8/1012:10 pm
BWI
- MDW
1 stop4h 20m
Southwest
Tue 8/1112:45 pm
MDW
- BWI
1 stop3h 15m
Southwest
Deal found 6/23![Southwest logo]()
$253
This United Airlines deal was found by Cheapflights users on 6/23. 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 8/76:15 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Mon 8/106:30 am
ORD
- BWI
Nonstop1h 57m
United Airlines
Deal found 6/23![United Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:33 pm
BWI
- ORD
1 stop6h 56m
Delta
Thu 7/309:45 am
ORD
- BWI
1 stop5h 08m
Delta
Deal found 6/22![Delta logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/81:05 pm
BWI
- RFD
1 stop22h 32m
Multiple Airlines
Mon 7/137:50 pm
RFD
- BWI
1 stop12h 04m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$277
This American Airlines deal was found by Cheapflights users on 6/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:44 am
BWI
- CMI
1 stop6h 23m
American Airlines
Sat 8/16:34 pm
CMI
- BWI
1 stop4h 42m
American Airlines
Deal found 6/20![American Airlines logo]()
$306
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:32 am
BWI
- PIA
1 stop4h 25m
United Airlines
Sat 7/255:43 pm
PIA
- BWI
1 stop5h 45m
United Airlines
Deal found 6/22![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 6/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:35 am
BWI
- MDW
Nonstop2h 00m
Southwest
Mon 9/77:30 am
MDW
- BWI
Nonstop1h 45m
Southwest
Deal found 6/19![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:30 pm
BWI
- ORD
1 stop6h 59m
Delta
Mon 8/245:20 pm
ORD
- BWI
1 stop4h 53m
Delta
Deal found 6/22![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:25 am
BWI
- PIA
1 stop7h 33m
United Airlines
Tue 9/156:05 am
PIA
- BWI
1 stop6h 53m
United Airlines
Deal found 6/22![United Airlines logo]()
$292
This American Airlines deal was found by Cheapflights users on 6/22. 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.
Fri 7/105:36 am
BWI
- PIA
1 stop4h 41m
American Airlines
Wed 7/156:58 pm
PIA
- BWI
1 stop4h 35m
American Airlines
Deal found 6/22![American Airlines logo]()
$324
This Southwest deal was found by Cheapflights users on 6/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/810:00 am
BWI
- MDW
Nonstop2h 00m
Southwest
Wed 7/158:10 am
MDW
- BWI
Nonstop2h 00m
Southwest
Deal found 6/21![Southwest logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/159:37 pm
BWI
- BMI
2 stops36h 34m
Multiple Airlines
Sun 9/134:24 pm
BMI
- BWI
1 stop16h 04m
Multiple Airlines
Deal found 6/23![Multiple Airlines logo]()
$311
This Delta deal was found by Cheapflights users on 6/23. 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 10/186:00 am
BWI
- ORD
1 stop5h 07m
Delta
Wed 10/211:15 pm
ORD
- BWI
1 stop4h 31m
Delta
Deal found 6/23![Delta logo]()
$283
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:25 am
BWI
- ORD
Nonstop2h 20m
United Airlines
Thu 9/1710:49 am
ORD
- BWI
Nonstop2h 09m
United Airlines
Deal found 6/22![United Airlines logo]()
$294
This American Airlines deal was found by Cheapflights users on 6/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/117:59 pm
BWI
- BMI
1 stop5h 36m
American Airlines
Sat 7/186:00 pm
BMI
- BWI
1 stop5h 16m
American Airlines
Deal found 6/21![American Airlines logo]()
$324
This Southwest deal was found by Cheapflights users on 6/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/308:30 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Fri 7/37:00 am
MDW
- BWI
Nonstop1h 45m
Southwest
Deal found 6/19![Southwest logo]()
$281
This Delta deal was found by Cheapflights users on 6/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:00 pm
BWI
- MLI
1 stop6h 31m
Delta
Tue 7/285:05 pm
MLI
- BWI
1 stop6h 34m
Delta
Deal found 6/20![Delta logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 7/246:25 am
BWI
- RFD
1 stop13h 35m
Multiple Airlines
Mon 7/277:50 pm
RFD
- BWI
1 stop12h 04m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$322
This United Airlines deal was found by Cheapflights users on 6/23. 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 7/306:15 am
BWI
- PIA
1 stop4h 54m
United Airlines
Sun 8/26:11 pm
PIA
- BWI
1 stop5h 17m
United Airlines
Deal found 6/23![United Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:00 am
BWI
- MLI
1 stop5h 25m
Delta
Wed 8/126:00 am
MLI
- BWI
1 stop6h 05m
Delta
Deal found 6/22![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 6/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:40 am
BWI
- MDW
Nonstop2h 00m
Southwest
Sat 7/47:35 am
MDW
- BWI
1 stop3h 25m
Southwest
Deal found 6/19![Southwest logo]()
$287
Last-minute flights from Baltimore to IllinoisDiscover last-minute flight deals from Baltimore to Illinois. Data last updated June 24, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Illinois. Data last updated June 24, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Sat 7/117:21 pm
BWI
- STL
1 stop23h 16m
Frontier
Mon 7/134:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/19![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/148:36 am
BWI
- STL
1 stop10h 01m
Frontier
Thu 7/166:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/23![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 7/159:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/19![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/168:36 am
BWI
- STL
1 stop10h 01m
Frontier
Tue 7/216:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/23![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/169:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/23![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Sat 7/187:21 pm
BWI
- STL
1 stop23h 16m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/20![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/209:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/23![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Sat 7/254:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/23![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Wed 7/229:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Tue 8/46:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/20![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/288:36 am
BWI
- STL
1 stop10h 01m
Frontier
Sat 8/14:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/23![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Tue 7/289:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Fri 7/314:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/22![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Thu 7/308:36 am
BWI
- STL
1 stop10h 01m
Frontier
Tue 8/116:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/21![Frontier logo]()
$176
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 June 24, 2026.
Search for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 6/23![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Tue 7/149:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 6/19![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/199:32 pm
BWI
- STL
1 stop20h 50m
Frontier
Deal found 6/23![Frontier logo]()
$77
This Trip.com deal was found by Cheapflights users on 6/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:45 am
BWI
- STL
1 stop11h 37m
Frontier
Deal found 6/22![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/259:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Deal found 6/23![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Thu 8/138:25 am
BWI
- STL
1 stop10h 12m
Frontier
Deal found 6/22![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Thu 9/178:00 am
BWI
- STL
1 stop26h 40m
Frontier
Deal found 6/21![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Mon 9/219:20 pm
BWI
- STL
1 stop13h 20m
Frontier
Deal found 6/21![Frontier logo]()
$97
This Trip.com deal was found by Cheapflights users on 6/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/199:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 6/22![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Sat 7/189:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Deal found 6/21![Frontier logo]()
$99
This Delta deal was found by Cheapflights users on 6/23. 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 8/14:54 pm
BWI
- MDW
1 stop6h 21m
Delta
Deal found 6/23![Delta logo]()
$99
This Delta deal was found by Cheapflights users on 6/23. 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 8/1512:17 pm
BWI
- ORD
1 stop5h 00m
Delta
Deal found 6/23![Delta logo]()
$99
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 June 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $143 (Kiwi.com) |
One-way from | $74 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $354 |
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 June 24, 2026.
Use the filters below to find and compare flights from Baltimore to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Mon 11/9
4:39 pm-9:10 pm
1 stop5h 31m
Chicago O'Hare Intl
Tue 11/10
9:30 am-5:03 pm
1 stop6h 33m
$234
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Sat 8/15
10:50 am-1:05 pm
1 stop3h 15m
Chicago Midway
Sat 8/22
11:45 am-4:00 pm
1 stop3h 15m
$236
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Mon 7/27
5:05 pm-8:20 pm
1 stop4h 15m
Chicago Midway
Wed 7/29
8:10 am-11:10 am
Nonstop2h 00m
$249
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Wed 7/8
1:05 pm-10:37 am
1 stop22h 32m
Chicago Greater Rockford
Sun 7/12
11:27 am-12:10 pm
1 stop23h 43m
$253
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Mon 8/10
12:10 pm-3:30 pm
1 stop4h 20m
Chicago Midway
Tue 8/11
12:45 pm-5:00 pm
1 stop3h 15m
$253
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Sat 7/18
9:37 pm-7:53 am
1 stop11h 16m
Chicago O'Hare Intl
Sat 7/25
7:05 am-6:33 pm
1 stop10h 28m
$258
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Sat 7/18
6:50 pm-11:53 pm
1 stop6h 03m
Chicago O'Hare Intl
Thu 7/23
8:52 am-4:41 pm
1 stop6h 49m
$263
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 7/28
12:33 pm-6:29 pm
1 stop6h 56m
Chicago O'Hare Intl
Thu 7/30
9:45 am-3:53 pm
1 stop5h 08m
$263
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Sat 8/1
1:05 pm-10:37 am
1 stop22h 32m
Chicago Greater Rockford
Mon 8/3
7:50 pm-3:34 pm
2 stops18h 44m
$267
Quickest round-trip
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Sat 9/5
6:35 am-7:35 am
Nonstop2h 00m
Chicago Midway
Mon 9/7
7:30 am-10:15 am
Nonstop1h 45m
$267
Showing 1-10 of 60 resultsSorted by cheapest first
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-STL
BWI-ORD
BWI-MDW
BWI-RFD
BWI-PIA
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-STL
BWI-ORD
BWI-MDW
BWI-RFD
What is the cheapest month to book a flight from Baltimore to Illinois?
Currently, February is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $43). Flying from Baltimore to Illinois in August is currently the most expensive (average of $674). 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 June 24, 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 afternoon, which can drop the price by up to 33% versus a flight in the morning.
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 June 24, 2026.
The most flights from BWI to USIL are scheduled on a Tuesday (22 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (10 on average).
How much does it cost to fly round-trip from Baltimore to Illinois?
How far ahead should I book a flight from Baltimore to Illinois?
To ensure you get the cheapest price possible for a flight from Baltimore to Illinois, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 June 20, 2026.
Travelers seeking maximum savings on their Baltimore to Illinois flight should consider departing on Friday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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 June 24, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican 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
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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 June 24, 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 4 airlines flying from Baltimore to Illinois
Discover the top 4 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 June 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$170 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$117 | Average$279 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$131 | Average$414 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$326 | FlexibilityNo cancel fee | On-time71% |