$63+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
May 3 — May 101
Round-trip
1 adult, Economy
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Find cheap flights from Baltimore to Illinois with Cheapflights
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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 April 3, 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 April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/128:52 am
BWI
- STL
1 stop9h 41m
Frontier
Tue 5/196:33 pm
STL
- BWI
1 stop20h 49m
Frontier
Deal found 3/31![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$135
This Expedia deal was found by Cheapflights users on 4/2. 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.
Sat 4/255:45 pm
BWI
- STL
1 stop6h 34m
Frontier
Wed 4/298:23 pm
STL
- BWI
1 stop10h 39m
Frontier
Deal found 4/2![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/139:25 pm
BWI
- STL
1 stop20h 29m
Frontier
Tue 5/196:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 3/31![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/295:49 pm
BWI
- STL
1 stop17h 37m
Frontier
Mon 5/48:23 pm
STL
- BWI
1 stop10h 20m
Frontier
Deal found 3/31![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Wed 5/135:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:23 pm
BWI
- STL
1 stop12h 32m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/2812:17 pm
BWI
- STL
1 stop19h 33m
Frontier
Tue 5/56:41 pm
STL
- BWI
1 stop12h 02m
Frontier
Deal found 3/31![Frontier logo]()
$159
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/272:23 pm
BWI
- STL
1 stop9h 56m
Frontier
Wed 4/298:23 pm
STL
- BWI
1 stop10h 39m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:45 am
BWI
- STL
1 stop11h 48m
Frontier
Thu 5/146:55 pm
STL
- BWI
1 stop11h 48m
Frontier
Deal found 4/1![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:23 pm
BWI
- STL
1 stop12h 32m
Frontier
Wed 5/135:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/84:05 pm
BWI
- ORD
1 stop8h 12m
Multiple Airlines
Tue 4/146:08 pm
ORD
- BWI
1 stop5h 36m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$173
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 April 3, 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 April 3, 2026.
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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
Mon 5/46:00 pm
ORD
- BWI
Nonstop2h 02m
United Airlines
Deal found 3/31![United Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 6/34:33 pm
BWI
- RFD
1 stop19h 04m
Multiple Airlines
Sun 6/711:27 am
RFD
- BWI
1 stop23h 48m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 4/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/912:10 pm
BWI
- MDW
Nonstop2h 00m
Southwest
Sat 5/92:15 pm
MDW
- BWI
1 stop4h 00m
Southwest
Deal found 4/1![Southwest logo]()
$245
This Delta deal was found by Cheapflights users on 4/1. 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 8/277:40 pm
BWI
- STL
1 stop4h 57m
Delta
Sun 8/306:00 am
STL
- BWI
1 stop6h 06m
Delta
Deal found 4/1![Delta logo]()
$275
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:31 pm
BWI
- PIA
1 stop6h 02m
American Airlines
Wed 4/296:23 pm
PIA
- BWI
1 stop4h 33m
American Airlines
Deal found 4/1![American Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:20 pm
BWI
- ORD
Nonstop2h 24m
United Airlines
Tue 6/29:25 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 4/2![United Airlines logo]()
$208
This Southwest deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 5/126:30 am
BWI
- MDW
Nonstop2h 05m
Southwest
Wed 5/207:45 am
MDW
- BWI
1 stop3h 05m
Southwest
Deal found 3/29![Southwest logo]()
$245
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:30 pm
BWI
- ORD
Nonstop2h 29m
United Airlines
Sat 5/166:00 pm
ORD
- BWI
Nonstop2h 02m
United Airlines
Deal found 4/2![United Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/284:35 pm
BWI
- ORD
1 stop6h 20m
Southwest
Tue 5/55:55 am
ORD
- BWI
2 stops7h 45m
Southwest
Deal found 3/31![Southwest logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:32 am
BWI
- EVV
1 stop9h 34m
Multiple Airlines
Mon 4/277:46 pm
EVV
- BWI
2 stops20h 08m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 5/234:51 pm
BWI
- ORD
1 stop5h 55m
Delta
Mon 5/255:41 pm
ORD
- BWI
1 stop5h 05m
Delta
Deal found 3/29![Delta logo]()
$284
This Southwest deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 5/79:15 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Sat 5/93:45 pm
MDW
- BWI
1 stop3h 50m
Southwest
Deal found 3/29![Southwest logo]()
$249
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:15 am
BWI
- ORD
Nonstop2h 14m
United Airlines
Mon 6/82:25 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 4/2![United Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/99:59 pm
BWI
- RFD
1 stop22h 01m
Multiple Airlines
Mon 7/137:50 pm
RFD
- BWI
1 stop12h 16m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$296
This American Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 4/156:31 pm
BWI
- MLI
1 stop6h 23m
American Airlines
Mon 4/206:41 pm
MLI
- BWI
1 stop4h 15m
American Airlines
Deal found 3/29![American Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/236:00 am
BWI
- MLI
1 stop5h 20m
Delta
Tue 5/265:17 pm
MLI
- BWI
1 stop6h 30m
Delta
Deal found 3/30![Delta logo]()
$312
This United Airlines deal was found by Cheapflights users on 4/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:15 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Tue 5/196:59 am
ORD
- BWI
Nonstop2h 03m
United Airlines
Deal found 4/1![United Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 4/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1710:35 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Tue 5/197:50 am
MDW
- BWI
1 stop3h 10m
Southwest
Deal found 4/1![Southwest logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 7/19:25 am
BWI
- RFD
1 stop26h 12m
Multiple Airlines
Sun 7/511:27 am
RFD
- BWI
1 stop9h 48m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$302
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:39 am
BWI
- MLI
1 stop7h 42m
American Airlines
Mon 4/2012:51 pm
MLI
- BWI
1 stop5h 48m
American Airlines
Deal found 4/1![American Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/142:35 pm
BWI
- ORD
1 stop8h 20m
Southwest
Mon 5/187:35 pm
ORD
- BWI
2 stops14h 20m
Southwest
Deal found 3/31![Southwest logo]()
$270
This Delta deal was found by Cheapflights users on 4/1. 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.
Sat 5/166:00 am
BWI
- BMI
1 stop6h 23m
Delta
Sat 5/2312:05 pm
BMI
- BWI
1 stop4h 19m
Delta
Deal found 4/1![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 5/298:15 am
BWI
- ORD
Nonstop2h 14m
United Airlines
Mon 6/19:25 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 3/29![United Airlines logo]()
$274
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:52 pm
BWI
- BMI
1 stop5h 00m
American Airlines
Tue 4/2111:16 am
BMI
- BWI
1 stop5h 44m
American Airlines
Deal found 4/2![American Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:25 am
BWI
- RFD
1 stop26h 12m
Multiple Airlines
Mon 8/37:50 pm
RFD
- BWI
2 stops18h 43m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 4/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:50 am
BWI
- MDW
Nonstop2h 05m
Southwest
Tue 6/29:10 am
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 4/2![Southwest logo]()
$271
This Delta deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/187:00 am
BWI
- BMI
1 stop5h 19m
Delta
Tue 4/216:00 am
BMI
- BWI
1 stop6h 13m
Delta
Deal found 3/30![Delta logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 4/1710:32 am
BWI
- EVV
1 stop9h 34m
Multiple Airlines
Mon 4/207:46 pm
EVV
- BWI
2 stops27h 58m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:39 am
BWI
- BMI
1 stop6h 07m
American Airlines
Mon 5/42:46 pm
BMI
- BWI
1 stop3h 53m
American Airlines
Deal found 4/2![American Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 4/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:05 am
BWI
- MDW
Nonstop2h 05m
Southwest
Fri 6/51:00 pm
MDW
- BWI
1 stop3h 15m
Southwest
Deal found 4/1![Southwest logo]()
$280
Last-minute flights from Baltimore to IllinoisDiscover last-minute flight deals from Baltimore to Illinois. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Illinois. Data last updated April 3, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/84:05 pm
BWI
- ORD
1 stop8h 12m
Multiple Airlines
Tue 4/146:08 pm
ORD
- BWI
1 stop5h 36m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$173
This Expedia deal was found by Cheapflights users on 4/2. 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.
Sat 4/255:45 pm
BWI
- STL
1 stop6h 34m
Frontier
Wed 4/298:23 pm
STL
- BWI
1 stop10h 39m
Frontier
Deal found 4/2![Frontier logo]()
$140
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/272:23 pm
BWI
- STL
1 stop9h 56m
Frontier
Wed 4/298:23 pm
STL
- BWI
1 stop10h 39m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/2812:17 pm
BWI
- STL
1 stop19h 33m
Frontier
Tue 5/56:41 pm
STL
- BWI
1 stop12h 02m
Frontier
Deal found 3/31![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/295:49 pm
BWI
- STL
1 stop17h 37m
Frontier
Mon 5/48:23 pm
STL
- BWI
1 stop10h 20m
Frontier
Deal found 3/31![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Wed 5/135:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:23 pm
BWI
- STL
1 stop12h 32m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:23 pm
BWI
- STL
1 stop12h 32m
Frontier
Wed 5/135:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/2![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/128:52 am
BWI
- STL
1 stop9h 41m
Frontier
Tue 5/196:33 pm
STL
- BWI
1 stop20h 49m
Frontier
Deal found 3/31![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:45 am
BWI
- STL
1 stop11h 48m
Frontier
Thu 5/146:55 pm
STL
- BWI
1 stop11h 48m
Frontier
Deal found 4/1![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/139:25 pm
BWI
- STL
1 stop20h 29m
Frontier
Tue 5/196:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 3/31![Frontier logo]()
$146
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 April 3, 2026.
Search for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Tue 6/28:52 am
BWI
- STL
1 stop9h 41m
Frontier
Deal found 4/3![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Tue 5/59:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Deal found 4/3![Frontier logo]()
$65
This Super.com deal was found by Cheapflights users on 4/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/266:05 am
BWI
- STL
1 stop5h 44m
Frontier
Deal found 4/1![Frontier logo]()
$69
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/25:45 pm
BWI
- STL
1 stop6h 34m
Frontier
Deal found 3/31![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 4/2912:17 pm
BWI
- STL
1 stop23h 09m
Frontier
Deal found 4/3![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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.
Tue 5/198:52 am
BWI
- STL
1 stop9h 41m
Frontier
Deal found 3/30![Frontier logo]()
$75
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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.
Tue 5/266:45 am
BWI
- STL
1 stop11h 48m
Frontier
Deal found 3/30![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Mon 6/19:23 pm
BWI
- STL
1 stop21h 10m
Frontier
Deal found 4/3![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 4/285:49 pm
BWI
- STL
1 stop14h 01m
Frontier
Deal found 3/29![Frontier logo]()
$88
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/136:20 pm
BWI
- MDW
Nonstop2h 10m
Southwest
Deal found 3/31![Southwest logo]()
$89
This United Airlines deal was found by Cheapflights users on 4/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:10 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Deal found 4/2![United Airlines logo]()
$89
This Flightnetwork deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:58 pm
BWI
- MDW
1 stop5h 21m
Frontier
Deal found 3/31![Frontier logo]()
$90
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 April 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $134 (Kiwi.com) |
One-way from | $63 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $295 |
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 April 3, 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
Wed 4/29
6:00 am-7:21 am
Nonstop2h 21m
Chicago O'Hare Intl
Mon 5/4
6:00 pm-9:02 pm
Nonstop2h 02m
$208
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Sat 5/23
6:20 pm-7:44 pm
Nonstop2h 24m
Chicago O'Hare Intl
Tue 6/2
9:25 pm-12:33 am
Nonstop2h 08m
$208
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Wed 6/3
4:33 pm-10:37 am
1 stop19h 04m
Chicago Greater Rockford
Sun 6/7
11:27 am-12:15 pm
1 stop23h 48m
$239
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Thu 5/14
8:30 pm-9:59 pm
Nonstop2h 29m
Chicago O'Hare Intl
Sat 5/16
6:00 pm-9:02 pm
Nonstop2h 02m
$239
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Sat 5/9
12:10 pm-1:10 pm
Nonstop2h 00m
Chicago Midway
Sat 5/9
2:15 pm-7:15 pm
1 stop4h 00m
$245
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Tue 5/12
6:30 am-7:35 am
Nonstop2h 05m
Chicago Midway
Wed 5/20
7:45 am-11:50 am
1 stop3h 05m
$245
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 4/28
4:35 pm-9:55 pm
1 stop6h 20m
Chicago O'Hare Intl
Tue 5/5
5:55 am-2:40 pm
2 stops7h 45m
$248
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Thu 5/7
9:15 pm-10:20 pm
Nonstop2h 05m
Chicago Midway
Sat 5/9
3:45 pm-8:35 pm
1 stop3h 50m
$249
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Thu 6/4
8:15 am-9:29 am
Nonstop2h 14m
Chicago O'Hare Intl
Mon 6/8
2:25 pm-5:33 pm
Nonstop2h 08m
$263
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Sun 5/17
6:15 am-7:36 am
Nonstop2h 21m
Chicago O'Hare Intl
Tue 5/19
6:59 am-10:02 am
Nonstop2h 03m
$263
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-RFD
BWI-MDW
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-RFD
BWI-MDW
What is the cheapest month to book a flight from Baltimore to Illinois?
Currently, January is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $57). Flying from Baltimore to Illinois in June is currently the most expensive (average of $135). 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 April 3, 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 35% 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 March 28, 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.
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 April 3, 2026.
The most flights from BWI to USIL are scheduled on a Thursday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Baltimore to Illinois?
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 April 3, 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
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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
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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 April 3, 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 April 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$41 | Average$108 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$57 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$131 | Average$319 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$134 | Average$285 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$394 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$239 | Average$486 | FlexibilityNo cancel fee | On-timeN/A |