$76+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
May 25 — Jun 11
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 April 25, 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 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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 5/297:23 pm
BWI
- STL
1 stop14h 32m
Frontier
Mon 6/15:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/24![Frontier logo]()
$155
This Expedia deal was found by Cheapflights users on 4/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/113:26 pm
BWI
- STL
1 stop9h 55m
Frontier
Sat 5/164:19 pm
STL
- BWI
1 stop15h 56m
Frontier
Deal found 4/20![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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 5/156:45 am
BWI
- STL
1 stop27h 10m
Frontier
Mon 5/185:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/24![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Tue 6/23:33 pm
STL
- BWI
1 stop24h 52m
Frontier
Deal found 4/23![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Wed 6/35:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/23![Frontier logo]()
$175
This Expedia deal was found by Cheapflights users on 4/23. 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 Expedia 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
Mon 6/84:19 pm
STL
- BWI
1 stop23h 19m
Frontier
Deal found 4/23![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:45 am
BWI
- STL
1 stop11h 48m
Frontier
Mon 6/111:24 am
STL
- BWI
1 stop20h 51m
Frontier
Deal found 4/23![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:45 am
BWI
- STL
1 stop11h 09m
Frontier
Thu 6/116:31 pm
STL
- BWI
1 stop12h 04m
Frontier
Deal found 4/23![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 6/26:45 am
BWI
- STL
1 stop11h 48m
Frontier
Thu 6/46:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/22![Frontier logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Sat 6/65:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/23![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Tue 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Fri 5/155:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/20![Frontier logo]()
$197
This Southwest deal was found by Cheapflights users on 4/19. 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 5/266:30 am
BWI
- MDW
Nonstop2h 05m
Southwest
Tue 5/264:40 pm
MDW
- BWI
1 stop4h 05m
Southwest
Deal found 4/19![Southwest logo]()
$202
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 25, 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 25, 2026.
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:00 am
BWI
- ORD
Nonstop2h 19m
United Airlines
Sun 5/2410:48 am
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 4/21![United Airlines logo]()
$231
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:00 pm
BWI
- STL
2 stops6h 10m
Southwest
Wed 6/103:15 pm
STL
- BWI
1 stop4h 15m
Southwest
Deal found 4/20![Southwest logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/29:46 pm
BWI
- RFD
1 stop13h 01m
Multiple Airlines
Mon 5/47:09 pm
RFD
- BWI
2 stops26h 48m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$271
This Delta deal was found by Cheapflights users on 4/21. 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 5/236:31 pm
BWI
- MLI
1 stop4h 50m
Delta
Tue 5/265:17 pm
MLI
- BWI
1 stop6h 30m
Delta
Deal found 4/21![Delta logo]()
$285
This KAYAK deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:10 pm
BWI
- ORD
1 stop4h 49m
American Airlines
Fri 5/296:47 pm
ORD
- BWI
1 stop4h 20m
American Airlines
Deal found 4/24![American Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:05 pm
BWI
- ORD
Nonstop2h 22m
United Airlines
Wed 5/207:00 am
ORD
- BWI
Nonstop2h 03m
United Airlines
Deal found 4/21![United Airlines logo]()
$236
This Southwest deal was found by Cheapflights users on 4/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:10 pm
BWI
- MDW
2 stops6h 25m
Southwest
Tue 5/1912:50 pm
MDW
- BWI
1 stop3h 35m
Southwest
Deal found 4/22![Southwest logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Fri 7/109:59 pm
BWI
- RFD
1 stop12h 16m
Multiple Airlines
Sun 7/1211:27 am
RFD
- BWI
1 stop10h 56m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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 6/108:05 pm
BWI
- ORD
Nonstop2h 24m
United Airlines
Sat 6/136:20 pm
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 4/24![United Airlines logo]()
$278
This Southwest deal was found by Cheapflights users on 4/19. 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 6/244:50 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Tue 6/3010:10 am
MDW
- BWI
1 stop3h 10m
Southwest
Deal found 4/19![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 4/22. 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 7/95:32 am
BWI
- MLI
1 stop5h 50m
Delta
Fri 7/175:07 pm
MLI
- BWI
1 stop6h 49m
Delta
Deal found 4/22![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 7/218:17 pm
BWI
- RFD
1 stop13h 56m
Multiple Airlines
Sun 7/2611:27 am
RFD
- BWI
2 stops19h 18m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$303
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Fri 5/87:52 pm
BWI
- MLI
1 stop5h 02m
American Airlines
Fri 5/156:40 pm
MLI
- BWI
1 stop4h 26m
American Airlines
Deal found 4/20![American Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:15 am
BWI
- MLI
1 stop4h 49m
United Airlines
Wed 7/291:15 pm
MLI
- BWI
1 stop7h 11m
United Airlines
Deal found 4/20![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 4/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/204:05 pm
BWI
- MDW
1 stop3h 55m
Southwest
Mon 5/257:55 am
MDW
- BWI
1 stop5h 05m
Southwest
Deal found 4/22![Southwest logo]()
$291
This Delta deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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
Sun 5/315:17 pm
MLI
- BWI
1 stop6h 40m
Delta
Deal found 4/24![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 6/247:27 pm
BWI
- RFD
2 stops16h 10m
Multiple Airlines
Mon 6/297:48 pm
RFD
- BWI
1 stop19h 50m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$307
This American Airlines deal was found by Cheapflights users on 4/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:11 pm
BWI
- MLI
1 stop8h 15m
American Airlines
Tue 5/1212:49 pm
MLI
- BWI
1 stop4h 11m
American Airlines
Deal found 4/23![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/22. 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 7/75:32 pm
BWI
- ORD
Nonstop2h 23m
United Airlines
Wed 7/86:20 am
ORD
- BWI
Nonstop1h 57m
United Airlines
Deal found 4/22![United Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 4/21. 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.
Sat 7/44:25 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Sat 7/114:50 pm
MDW
- BWI
Nonstop1h 55m
Southwest
Deal found 4/21![Southwest logo]()
$293
This Delta deal was found by Cheapflights users on 4/20. 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.
Sat 5/306:31 pm
BWI
- BMI
1 stop4h 59m
Delta
Mon 6/14:14 pm
BMI
- BWI
1 stop5h 35m
Delta
Deal found 4/20![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 6/177:27 pm
BWI
- RFD
2 stops16h 10m
Multiple Airlines
Fri 6/197:53 pm
RFD
- BWI
1 stop12h 08m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Sat 5/166:15 am
BWI
- PIA
1 stop4h 49m
United Airlines
Sat 5/162:50 pm
PIA
- BWI
1 stop5h 12m
United Airlines
Deal found 4/22![United Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 4/19. 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.
Fri 5/227:10 pm
BWI
- MDW
Nonstop2h 10m
Southwest
Fri 5/299:25 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 4/19![Southwest logo]()
$293
This Delta deal was found by Cheapflights users on 4/20. 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.
Thu 6/1110:33 am
BWI
- MLI
1 stop7h 04m
Delta
Sun 6/145:17 pm
MLI
- BWI
1 stop6h 41m
Delta
Deal found 4/20![Delta logo]()
$334
This American Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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 5/87:52 pm
BWI
- BMI
1 stop5h 00m
American Airlines
Sun 5/105:00 am
BMI
- BWI
1 stop5h 16m
American Airlines
Deal found 4/24![American Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:45 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Sat 7/119:40 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 4/21![United Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 4/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:05 pm
BWI
- MDW
1 stop3h 45m
Southwest
Wed 7/87:35 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 4/22![Southwest logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Fri 5/297:10 am
BWI
- RFD
1 stop13h 03m
Multiple Airlines
Mon 6/18:03 pm
RFD
- BWI
1 stop12h 12m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/20. 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 5/57:00 am
BWI
- BMI
1 stop5h 19m
Delta
Sat 5/96:00 am
BMI
- BWI
1 stop5h 53m
Delta
Deal found 4/20![Delta logo]()
$339
Last-minute flights from Baltimore to IllinoisDiscover last-minute flight deals from Baltimore to Illinois. Data last updated April 25, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Illinois. Data last updated April 25, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:45 am
BWI
- STL
1 stop11h 09m
Frontier
Tue 6/96:31 pm
STL
- BWI
1 stop12h 04m
Frontier
Deal found 4/23![Frontier logo]()
$180
This Expedia deal was found by Cheapflights users on 4/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/113:26 pm
BWI
- STL
1 stop9h 55m
Frontier
Sat 5/164:19 pm
STL
- BWI
1 stop15h 56m
Frontier
Deal found 4/20![Frontier logo]()
$160
This Expedia deal was found by Cheapflights users on 4/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/113:26 pm
BWI
- STL
1 stop9h 55m
Frontier
Mon 6/111:24 am
STL
- BWI
1 stop20h 51m
Frontier
Deal found 4/23![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Tue 6/23:33 pm
STL
- BWI
1 stop24h 52m
Frontier
Deal found 4/23![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Wed 6/35:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/23![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Sat 6/65:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/23![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Tue 5/129:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Fri 5/155:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/20![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/139:13 pm
BWI
- STL
2 stops28h 08m
Frontier
Wed 6/35:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/23![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:45 am
BWI
- STL
1 stop11h 09m
Frontier
Thu 6/116:31 pm
STL
- BWI
1 stop12h 04m
Frontier
Deal found 4/23![Frontier logo]()
$185
This Southwest deal was found by Cheapflights users on 4/19. 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 5/266:30 am
BWI
- MDW
Nonstop2h 05m
Southwest
Tue 5/264:40 pm
MDW
- BWI
1 stop4h 05m
Southwest
Deal found 4/19![Southwest logo]()
$202
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:45 am
BWI
- STL
1 stop11h 48m
Frontier
Mon 6/111:24 am
STL
- BWI
1 stop20h 51m
Frontier
Deal found 4/23![Frontier logo]()
$181
This Booking.com deal was found by Cheapflights users on 4/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:26 pm
BWI
- STL
1 stop9h 31m
Frontier
Mon 6/14:19 pm
STL
- BWI
1 stop15h 56m
Frontier
Deal found 4/23![Frontier logo]()
$193
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 25, 2026.
Search for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated April 25, 2026.
This Frontier deal was found by Cheapflights users on 4/21. 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 Frontier 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 4/21![Frontier logo]()
$76
This Gotogate deal was found by Cheapflights users on 4/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/149:59 pm
BWI
- STL
1 stop27h 22m
Frontier
Deal found 4/20![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Tue 6/28:52 am
BWI
- STL
1 stop9h 41m
Frontier
Deal found 4/21![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” 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 5/189:23 pm
BWI
- STL
1 stop21h 10m
Frontier
Deal found 4/24![Frontier logo]()
$93
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/203:10 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Deal found 4/20![Southwest logo]()
$93
This American Airlines deal was found by Cheapflights users on 4/20. 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 6/106:00 am
BWI
- ORD
Nonstop2h 27m
American Airlines
Deal found 4/20![American Airlines logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 7/218:17 pm
BWI
- RFD
1 stop13h 56m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$94
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:52 am
BWI
- ORD
1 stop11h 59m
Frontier
Deal found 4/20![Frontier logo]()
$94
This Expedia deal was found by Cheapflights users on 4/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:33 pm
BWI
- STL
1 stop7h 26m
Frontier
Deal found 4/21![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 4/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:45 am
BWI
- MDW
1 stop5h 27m
Frontier
Deal found 4/20![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:13 pm
BWI
- ORD
1 stop11h 42m
Frontier
Deal found 4/20![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 4/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:45 am
BWI
- STL
1 stop11h 09m
Frontier
Deal found 4/22![Frontier logo]()
$96
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 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Expedia) |
One-way from | $76 (Frontier) |
Popular in | April |
Cheapest in | September |
Average price | $329 |
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 25, 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
Tue 5/19
11:00 am-12:19 pm
Nonstop2h 19m
Chicago O'Hare Intl
Sun 5/24
10:48 am-1:54 pm
Nonstop2h 06m
$231
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Mon 5/18
7:05 pm-8:27 pm
Nonstop2h 22m
Chicago O'Hare Intl
Wed 5/20
7:00 am-10:03 am
Nonstop2h 03m
$236
BaltimoreSt. Louis
BWI - STL
BWISTL
Baltimore/Washington
Wed 6/3
5:00 pm-10:10 pm
2 stops6h 10m
Lambert-St Louis
Wed 6/10
3:15 pm-8:30 pm
1 stop4h 15m
$267
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Sat 5/2
9:46 pm-9:47 am
1 stop13h 01m
Chicago Greater Rockford
Mon 5/4
7:09 pm-10:57 pm
2 stops26h 48m
$271
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Wed 6/10
8:05 pm-9:29 pm
Nonstop2h 24m
Chicago O'Hare Intl
Sat 6/13
6:20 pm-9:26 pm
Nonstop2h 06m
$278
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Sat 5/16
5:10 pm-10:35 pm
2 stops6h 25m
Chicago Midway
Tue 5/19
12:50 pm-5:25 pm
1 stop3h 35m
$280
BaltimoreMoline
BWI - MLI
BWIMLI
Baltimore/Washington
Sat 5/23
6:31 pm-10:21 pm
1 stop4h 50m
Moline Quad-City
Tue 5/26
5:17 pm-12:47 am
1 stop6h 30m
$285
BaltimoreMoline
BWI - MLI
BWIMLI
Baltimore/Washington
Wed 7/22
6:15 am-10:04 am
1 stop4h 49m
Moline Quad-City
Wed 7/29
1:15 pm-9:26 pm
1 stop7h 11m
$285
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Wed 6/24
4:50 pm-5:55 pm
Nonstop2h 05m
Chicago Midway
Tue 6/30
10:10 am-2:20 pm
1 stop3h 10m
$289
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 7/7
5:32 pm-6:55 pm
Nonstop2h 23m
Chicago O'Hare Intl
Wed 7/8
6:20 am-9:17 am
Nonstop1h 57m
$289
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-MDW
BWI-RFD
BWI-ORD
BWI-STL
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-MDW
BWI-RFD
BWI-ORD
BWI-STL
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 68 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 month to book a flight from Baltimore to Illinois?
Currently, May is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $34). Flying from Baltimore to Illinois in August is currently the most expensive (average of $631). 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 25, 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 32% 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 April 18, 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. 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 25, 2026.
The most flights from BWI to USIL are scheduled on a Friday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 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 25, 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
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Boarding
8.1
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 25, 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 5 airlines flying from Baltimore to Illinois
Discover the top 5 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 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$52 | Average$148 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$57 | Average$164 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$131 | Average$321 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$134 | Average$288 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$353 | FlexibilityNo cancel fee | On-time71% |