$60+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
May 17 — May 241
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 17, 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 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/198:52 am
BWI
- STL
1 stop9h 41m
Frontier
Wed 5/275:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/14![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/199:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Tue 5/266:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/13![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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
Tue 5/196:33 pm
STL
- BWI
1 stop20h 49m
Frontier
Deal found 4/14![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:52 am
BWI
- STL
1 stop9h 41m
Frontier
Sat 5/305:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/12![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:52 am
BWI
- STL
1 stop9h 02m
Frontier
Wed 5/205:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/13![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:45 am
BWI
- STL
1 stop11h 09m
Frontier
Sat 5/95:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/14![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/86:45 am
BWI
- STL
1 stop27h 10m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/14![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/36:28 pm
BWI
- STL
1 stop21h 03m
Frontier
Sat 6/65:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/16![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:39 pm
BWI
- STL
1 stop6h 42m
Frontier
Tue 5/126:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/12![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/119:23 pm
BWI
- STL
1 stop21h 10m
Frontier
Tue 5/196:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/13![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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
Tue 6/26:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/16![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:18 pm
BWI
- MDW
1 stop7h 19m
Frontier
Tue 4/282:15 pm
MDW
- BWI
1 stop9h 29m
Frontier
Deal found 4/12![Frontier logo]()
$199
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 17, 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 17, 2026.
This United Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:15 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Tue 5/511:10 am
ORD
- BWI
Nonstop2h 03m
United Airlines
Deal found 4/12![United Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/96:02 pm
BWI
- RFD
1 stop16h 45m
Multiple Airlines
Sun 5/1710:37 am
RFD
- BWI
2 stops19h 59m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$211
This Southwest deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/235:10 pm
BWI
- MDW
2 stops6h 25m
Southwest
Wed 5/277:50 am
MDW
- BWI
1 stop3h 20m
Southwest
Deal found 4/14![Southwest logo]()
$229
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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.
Fri 6/265:32 am
BWI
- MDW
1 stop5h 35m
Delta
Tue 6/309:17 am
MDW
- BWI
1 stop6h 28m
Delta
Deal found 4/14![Delta logo]()
$248
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:24 pm
BWI
- PIA
1 stop4h 35m
American Airlines
Wed 8/264:24 pm
PIA
- BWI
1 stop4h 34m
American Airlines
Deal found 4/15![American Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/1610:35 am
BWI
- ORD
2 stops5h 55m
Southwest
Tue 5/1911:55 am
ORD
- BWI
1 stop7h 05m
Southwest
Deal found 4/14![Southwest logo]()
$233
This United Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/193:27 pm
BWI
- ORD
Nonstop2h 19m
United Airlines
Fri 5/222:25 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 4/14![United Airlines logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 4/16![Multiple Airlines logo]()
$249
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/216:10 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Tue 5/269:25 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 4/16![United Airlines logo]()
$243
This Southwest deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/286:05 am
BWI
- MDW
Nonstop2h 05m
Southwest
Mon 6/17:55 am
MDW
- BWI
1 stop5h 05m
Southwest
Deal found 4/16![Southwest logo]()
$249
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 am
BWI
- MLI
1 stop5h 20m
Delta
Tue 5/265:17 pm
MLI
- BWI
1 stop6h 30m
Delta
Deal found 4/12![Delta logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/279:38 am
BWI
- EVV
1 stop10h 28m
Multiple Airlines
Fri 5/17:46 pm
EVV
- BWI
1 stop24h 05m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/216:05 am
BWI
- MDW
Nonstop2h 05m
Southwest
Sun 5/246:40 am
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 4/16![Southwest logo]()
$258
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:32 am
BWI
- MLI
1 stop5h 52m
Delta
Tue 6/305:17 pm
MLI
- BWI
1 stop6h 23m
Delta
Deal found 4/12![Delta logo]()
$285
This United Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:20 pm
BWI
- ORD
Nonstop2h 24m
United Airlines
Mon 5/259:25 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 4/12![United Airlines logo]()
$264
This American Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:15 pm
BWI
- PIA
1 stop7h 58m
American Airlines
Sun 5/36:23 pm
PIA
- BWI
1 stop4h 33m
American Airlines
Deal found 4/12![American Airlines logo]()
$334
This Southwest deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 7/18:30 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Sat 7/49:00 am
MDW
- BWI
2 stops5h 40m
Southwest
Deal found 4/14![Southwest logo]()
$258
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/94:51 pm
BWI
- MLI
1 stop6h 30m
Delta
Wed 5/135:17 pm
MLI
- BWI
1 stop6h 30m
Delta
Deal found 4/13![Delta logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 6/241:10 pm
BWI
- RFD
1 stop22h 27m
Multiple Airlines
Mon 6/297:48 pm
RFD
- BWI
1 stop12h 13m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$298
This American Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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 5/16:31 pm
BWI
- BMI
1 stop6h 21m
American Airlines
Mon 5/42:46 pm
BMI
- BWI
1 stop3h 53m
American Airlines
Deal found 4/17![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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
- MLI
1 stop4h 49m
United Airlines
Sat 5/235:39 pm
MLI
- BWI
1 stop5h 54m
United Airlines
Deal found 4/16![United Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/96:10 am
BWI
- MDW
1 stop3h 33m
Delta
Mon 5/115:10 pm
MDW
- BWI
1 stop6h 47m
Delta
Deal found 4/14![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/117:10 pm
BWI
- MDW
Nonstop2h 10m
Southwest
Fri 5/155:50 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 4/14![Southwest logo]()
$274
This United Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:25 am
BWI
- ORD
Nonstop2h 14m
United Airlines
Sun 7/56:20 am
ORD
- BWI
Nonstop1h 57m
United Airlines
Deal found 4/12![United Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 6/66:15 am
BWI
- MDW
Nonstop2h 00m
Southwest
Fri 6/127:00 pm
MDW
- BWI
Nonstop1h 55m
Southwest
Deal found 4/15![Southwest logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/79:59 pm
BWI
- RFD
1 stop13h 00m
Multiple Airlines
Sun 5/1010:37 am
RFD
- BWI
1 stop11h 52m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 4/256:03 am
BWI
- ORD
1 stop5h 16m
Delta
Mon 4/275:04 pm
ORD
- BWI
1 stop4h 55m
Delta
Deal found 4/16![Delta logo]()
$305
This United Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/268:15 am
BWI
- ORD
Nonstop2h 14m
United Airlines
Thu 5/286:20 pm
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 4/13![United Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:10 pm
BWI
- RFD
1 stop13h 44m
Multiple Airlines
Thu 5/710:37 am
RFD
- BWI
2 stops20h 06m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 6/115:32 am
BWI
- MLI
1 stop5h 52m
Delta
Tue 6/165:17 pm
MLI
- BWI
1 stop6h 23m
Delta
Deal found 4/14![Delta logo]()
$307
Last-minute flights from Baltimore to IllinoisDiscover last-minute flight deals from Baltimore to Illinois. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Illinois. Data last updated April 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:45 am
BWI
- STL
1 stop11h 09m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/14![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:45 am
BWI
- STL
1 stop11h 09m
Frontier
Sat 5/95:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/12![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/86:45 am
BWI
- STL
1 stop27h 10m
Frontier
Mon 5/115:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/14![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:39 pm
BWI
- STL
1 stop6h 42m
Frontier
Tue 5/126:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/12![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/119:23 pm
BWI
- STL
1 stop21h 10m
Frontier
Tue 5/196:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/13![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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
Tue 5/196:33 pm
STL
- BWI
1 stop20h 49m
Frontier
Deal found 4/14![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:52 am
BWI
- STL
1 stop9h 41m
Frontier
Sat 5/305:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/12![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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
1 stop20h 41m
Frontier
Wed 5/205:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/15![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:52 am
BWI
- STL
1 stop9h 02m
Frontier
Wed 5/205:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/13![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/198:52 am
BWI
- STL
1 stop9h 41m
Frontier
Wed 5/275:27 pm
STL
- BWI
1 stop13h 16m
Frontier
Deal found 4/14![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/199:13 pm
BWI
- STL
1 stop12h 42m
Frontier
Tue 5/266:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/13![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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
Tue 6/26:33 pm
STL
- BWI
1 stop12h 10m
Frontier
Deal found 4/16![Frontier logo]()
$147
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 17, 2026.
Search for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Trip.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:52 am
BWI
- STL
1 stop9h 41m
Frontier
Deal found 4/14![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 4/16![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/78:52 am
BWI
- STL
1 stop9h 02m
Frontier
Deal found 4/16![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:13 pm
BWI
- STL
1 stop20h 02m
Frontier
Deal found 4/12![Frontier logo]()
$67
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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
1 stop20h 41m
Frontier
Deal found 4/14![Frontier logo]()
$71
This Frontier deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 4/14![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/29:38 am
BWI
- STL
1 stop14h 41m
Frontier
Deal found 4/12![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 4/15![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:45 am
BWI
- STL
1 stop11h 09m
Frontier
Deal found 4/14![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:05 am
BWI
- STL
1 stop5h 21m
Frontier
Deal found 4/16![Frontier logo]()
$90
This Expedia deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 4/2712:27 pm
BWI
- MDW
1 stop8h 04m
Frontier
Deal found 4/13![Frontier logo]()
$90
This Priceline deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:05 am
BWI
- ORD
1 stop6h 27m
Frontier
Deal found 4/13![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 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $121 (Kiwi.com) |
One-way from | $60 (Trip.com) |
Popular in | March |
Cheapest in | September |
Average price | $317 |
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 17, 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 5/4
6:15 am-7:36 am
Nonstop2h 21m
Chicago O'Hare Intl
Tue 5/5
11:10 am-2:13 pm
Nonstop2h 03m
$208
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Sat 5/9
6:02 pm-9:47 am
1 stop16h 45m
Chicago Greater Rockford
Sun 5/17
10:37 am-7:36 am
2 stops19h 59m
$211
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Sat 5/23
5:10 pm-10:35 pm
2 stops6h 25m
Chicago Midway
Wed 5/27
7:50 am-12:10 pm
1 stop3h 20m
$229
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Sat 5/16
10:35 am-3:30 pm
2 stops5h 55m
Chicago O'Hare Intl
Tue 5/19
11:55 am-8:00 pm
1 stop7h 05m
$233
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 5/19
3:27 pm-4:46 pm
Nonstop2h 19m
Chicago O'Hare Intl
Fri 5/22
2:25 pm-5:33 pm
Nonstop2h 08m
$243
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Thu 5/21
6:10 am-7:25 am
Nonstop2h 15m
Chicago O'Hare Intl
Tue 5/26
9:25 pm-12:33 am
Nonstop2h 08m
$243
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Fri 6/26
5:32 am-10:07 am
1 stop5h 35m
Chicago Midway
Tue 6/30
9:17 am-4:45 pm
1 stop6h 28m
$248
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Fri 7/10
9:59 pm-9:15 am
1 stop12h 16m
Chicago Greater Rockford
Sun 7/12
11:27 am-11:23 pm
1 stop10h 56m
$249
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Thu 5/28
6:05 am-7:10 am
Nonstop2h 05m
Chicago Midway
Mon 6/1
7:55 am-2:00 pm
1 stop5h 05m
$249
Quickest round-trip
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Thu 5/21
6:05 am-7:10 am
Nonstop2h 05m
Chicago Midway
Sun 5/24
6:40 am-9:30 am
Nonstop1h 50m
$258
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-MDW
BWI-ORD
BWI-RFD
BWI-EVV
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-MDW
BWI-ORD
BWI-RFD
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 17, 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 33% 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 11, 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 17, 2026.
The most flights from BWI to USIL are scheduled on a Friday (25 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (14 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 17, 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.
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
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
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 April 17, 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$52 | Average$115 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$57 | Average$166 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$131 | Average$320 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$134 | Average$287 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$158 | Average$353 | FlexibilityNo cancel fee | On-time71% |