$81+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Jul 9 — Jul 161
Round-trip
1 adult, Economy
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Cheapest flights from Baltimore to IllinoisExplore the most affordable flight options available from Baltimore to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.
Explore the most affordable flight options available from Baltimore to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/306:28 am
BWI
- STL
1 stop12h 02m
Frontier
Tue 7/76:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/6![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/39:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Tue 7/76:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/6![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/39:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Mon 7/64:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/6![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/6![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 8/189:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Fri 8/215:33 pm
STL
- BWI
1 stop13h 12m
Frontier
Deal found 6/6![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/4![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Sun 8/166:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/6![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 10/217:29 pm
BWI
- STL
1 stop15h 11m
Frontier
Wed 10/2810:35 am
STL
- BWI
1 stop7h 01m
Frontier
Deal found 6/4![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Fri 8/215:33 pm
STL
- BWI
1 stop13h 12m
Frontier
Deal found 6/6![Frontier logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 8/189:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Sat 8/225:33 pm
STL
- BWI
1 stop13h 12m
Frontier
Deal found 6/6![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 10/1411:09 am
BWI
- ORD
Nonstop2h 23m
Frontier
Sun 10/189:33 pm
ORD
- BWI
1 stop10h 24m
Frontier
Deal found 6/7![Frontier logo]()
$223
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/291:55 pm
BWI
- MDW
1 stop4h 20m
Southwest
Mon 8/317:55 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 6/8![Southwest logo]()
$224
Best flights from Baltimore to IllinoisDiscover carefully curated flight deals from Baltimore to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 9, 2026.
Discover carefully curated flight deals from Baltimore to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 9, 2026.
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:00 pm
BWI
- MDW
1 stop6h 15m
Delta
Tue 7/285:10 pm
MDW
- BWI
1 stop6h 29m
Delta
Deal found 6/5![Delta logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/291:05 pm
BWI
- RFD
1 stop22h 32m
Multiple Airlines
Mon 8/37:50 pm
RFD
- BWI
1 stop12h 04m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$240
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 9/78:10 am
BWI
- ORD
Nonstop2h 21m
United Airlines
Thu 9/1710:49 am
ORD
- BWI
Nonstop2h 09m
United Airlines
Deal found 6/8![United Airlines logo]()
$244
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/278:00 pm
BWI
- MDW
Nonstop2h 00m
Southwest
Mon 8/317:55 pm
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 6/4![Southwest logo]()
$245
This American Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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.
Mon 7/68:13 pm
BWI
- PIA
1 stop5h 09m
American Airlines
Tue 7/146:58 pm
PIA
- BWI
1 stop4h 35m
American Airlines
Deal found 6/4![American Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:55 am
BWI
- MDW
2 stops6h 10m
Southwest
Mon 8/318:10 am
MDW
- BWI
1 stop3h 35m
Southwest
Deal found 6/8![Southwest logo]()
$250
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 6/307:38 pm
BWI
- ORD
1 stop5h 21m
Delta
Fri 7/37:01 am
ORD
- BWI
1 stop3h 46m
Delta
Deal found 6/5![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 6/306:15 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Sat 7/42:30 pm
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 6/8![United Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/131:10 pm
BWI
- RFD
1 stop22h 27m
Multiple Airlines
Mon 6/157:53 pm
RFD
- BWI
1 stop12h 08m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$282
This Southwest deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/215:20 pm
BWI
- MDW
1 stop3h 50m
Southwest
Thu 7/2311:55 am
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 6/5![Southwest logo]()
$259
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/156:15 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Tue 7/216:20 pm
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 6/6![United Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:08 am
BWI
- ORD
1 stop5h 29m
Delta
Wed 7/155:30 am
ORD
- BWI
1 stop6h 31m
Delta
Deal found 6/4![Delta logo]()
$293
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/78:00 pm
BWI
- MDW
Nonstop2h 00m
Southwest
Mon 8/109:20 am
MDW
- BWI
1 stop4h 20m
Southwest
Deal found 6/8![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 6/298:16 am
BWI
- ORD
Nonstop2h 14m
United Airlines
Wed 7/110:51 am
ORD
- BWI
Nonstop2h 06m
United Airlines
Deal found 6/5![United Airlines logo]()
$283
This American Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/38:13 pm
BWI
- PIA
1 stop5h 09m
American Airlines
Sat 7/114:43 pm
PIA
- BWI
1 stop6h 16m
American Airlines
Deal found 6/6![American Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/316:25 am
BWI
- RFD
1 stop13h 35m
Multiple Airlines
Mon 8/37:50 pm
RFD
- BWI
1 stop12h 04m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 11/212:10 pm
BWI
- ORD
1 stop5h 22m
Delta
Tue 12/111:10 am
ORD
- BWI
1 stop4h 53m
Delta
Deal found 6/7![Delta logo]()
$301
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/286:30 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Sun 8/27:10 am
MDW
- BWI
Nonstop1h 50m
Southwest
Deal found 6/8![Southwest logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/111:05 pm
BWI
- RFD
1 stop22h 32m
Multiple Airlines
Mon 7/207:50 pm
RFD
- BWI
1 stop12h 04m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:00 am
BWI
- MLI
1 stop5h 25m
Delta
Wed 8/126:00 am
MLI
- BWI
1 stop6h 05m
Delta
Deal found 6/8![Delta logo]()
$312
This American Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 10/136:24 pm
BWI
- CMI
1 stop4h 09m
American Airlines
Sat 10/1711:34 am
CMI
- BWI
1 stop3h 42m
American Airlines
Deal found 6/7![American Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/48:16 am
BWI
- ORD
Nonstop2h 14m
United Airlines
Tue 7/79:20 pm
ORD
- BWI
Nonstop2h 08m
United Airlines
Deal found 6/4![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:30 am
BWI
- MDW
2 stops6h 40m
Southwest
Wed 8/1212:35 pm
MDW
- BWI
1 stop3h 05m
Southwest
Deal found 6/7![Southwest logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/131:10 pm
BWI
- RFD
1 stop22h 27m
Multiple Airlines
Wed 6/1710:07 am
RFD
- BWI
1 stop21h 54m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:00 am
BWI
- BMI
1 stop5h 27m
Delta
Sat 8/1512:09 pm
BMI
- BWI
1 stop6h 41m
Delta
Deal found 6/8![Delta logo]()
$319
This American Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:59 pm
BWI
- PIA
1 stop5h 16m
American Airlines
Sun 7/194:22 pm
PIA
- BWI
1 stop6h 52m
American Airlines
Deal found 6/8![American Airlines logo]()
$392
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 9/246:30 am
BWI
- MDW
Nonstop2h 00m
Southwest
Sun 9/278:05 am
MDW
- BWI
1 stop4h 15m
Southwest
Deal found 6/4![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 6/305:32 pm
BWI
- PIA
1 stop6h 48m
United Airlines
Sat 7/410:44 am
PIA
- BWI
1 stop5h 52m
United Airlines
Deal found 6/8![United Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/39:30 pm
BWI
- RFD
1 stop12h 45m
Multiple Airlines
Mon 7/67:50 pm
RFD
- BWI
1 stop12h 04m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$343
This American Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/158:10 pm
BWI
- PIA
1 stop4h 49m
American Airlines
Mon 8/1712:20 pm
PIA
- BWI
2 stops9h 38m
American Airlines
Deal found 6/8![American Airlines logo]()
$397
Last-minute flights from Baltimore to IllinoisDiscover last-minute flight deals from Baltimore to Illinois. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from Baltimore to Illinois. Data last updated June 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/306:28 am
BWI
- STL
1 stop12h 02m
Frontier
Tue 7/76:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/6![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 6/308:31 am
BWI
- STL
1 stop9h 59m
Frontier
Thu 7/26:31 pm
STL
- BWI
1 stop12h 04m
Frontier
Deal found 6/7![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 6/308:31 am
BWI
- STL
1 stop9h 59m
Frontier
Fri 7/35:06 pm
STL
- BWI
1 stop22h 20m
Frontier
Deal found 6/5![Frontier logo]()
$188
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/3012:32 pm
BWI
- MDW
1 stop6h 59m
Delta
Wed 7/19:17 am
MDW
- BWI
1 stop6h 28m
Delta
Deal found 6/4![Delta logo]()
$227
This Southwest deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/11:00 pm
BWI
- MDW
1 stop4h 10m
Southwest
Wed 7/15:30 pm
MDW
- BWI
Nonstop1h 55m
Southwest
Deal found 6/5![Southwest logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/39:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Tue 7/76:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/6![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/39:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Mon 7/64:57 pm
STL
- BWI
1 stop13h 29m
Frontier
Deal found 6/6![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:37 pm
BWI
- STL
1 stop21h 00m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/6![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/156:05 am
BWI
- ORD
1 stop18h 05m
Frontier
Tue 7/215:13 pm
ORD
- BWI
1 stop14h 41m
Frontier
Deal found 6/4![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Wed 7/224:57 pm
STL
- BWI
1 stop5h 20m
Frontier
Deal found 6/4![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Tue 8/46:34 pm
STL
- BWI
1 stop11h 52m
Frontier
Deal found 6/9![Frontier logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/309:37 pm
BWI
- STL
1 stop12h 20m
Frontier
Mon 8/34:57 pm
STL
- BWI
1 stop21h 37m
Frontier
Deal found 6/4![Frontier logo]()
$194
One-way flights from Baltimore to IllinoisSearch for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
Search for one-way flight options from Baltimore to Illinois. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/316:57 pm
BWI
- STL
1 stop20h 51m
Frontier
Deal found 6/4![Frontier logo]()
$81
This WAYA deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:29 pm
BWI
- STL
1 stop5h 01m
Frontier
Deal found 6/7![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/39:32 pm
BWI
- STL
1 stop12h 20m
Frontier
Deal found 6/6![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 6/7![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/236:28 am
BWI
- STL
1 stop12h 02m
Frontier
Deal found 6/4![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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
- STL
1 stop23h 03m
Frontier
Deal found 6/4![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 8/48:36 am
BWI
- STL
1 stop10h 01m
Frontier
Deal found 6/5![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 9/57:28 pm
BWI
- STL
1 stop23h 02m
Frontier
Deal found 6/8![Frontier logo]()
$95
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/74:50 pm
BWI
- MDW
Nonstop2h 05m
Southwest
Deal found 6/4![Southwest logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/221:05 pm
BWI
- RFD
1 stop22h 32m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$99
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:15 am
BWI
- ORD
Nonstop2h 15m
United Airlines
Deal found 6/9![United Airlines logo]()
$99
This American Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 6/306:03 am
BWI
- ORD
Nonstop2h 27m
American Airlines
Deal found 6/5![American Airlines logo]()
$100
Find flight deals from Baltimore to Illinois
Keep the following information in mind while searching for Baltimore to Illinois flight deals. Data was last updated June 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Kiwi.com) |
One-way from | $81 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $353 |
Cheapflights Fare Finder
Customize your flight search to find flights from Baltimore to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 9, 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 - MDW
BWIMDW
Baltimore/Washington
Tue 7/21
5:00 pm-10:15 pm
1 stop6h 15m
Chicago Midway
Tue 7/28
5:10 pm-12:39 am
1 stop6h 29m
$227
BaltimoreChicago
BWI - RFD
BWIRFD
Baltimore/Washington
Wed 7/29
1:05 pm-10:37 am
1 stop22h 32m
Chicago Greater Rockford
Mon 8/3
7:50 pm-8:54 am
1 stop12h 04m
$240
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Mon 9/7
8:10 am-9:31 am
Nonstop2h 21m
Chicago O'Hare Intl
Thu 9/17
10:49 am-1:58 pm
Nonstop2h 09m
$244
Quickest round-trip
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Thu 8/27
8:00 pm-9:00 pm
Nonstop2h 00m
Chicago Midway
Mon 8/31
7:55 pm-10:45 pm
Nonstop1h 50m
$245
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Sat 8/29
10:55 am-4:05 pm
2 stops6h 10m
Chicago Midway
Mon 8/31
8:10 am-12:45 pm
1 stop3h 35m
$250
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Tue 7/21
5:20 pm-8:10 pm
1 stop3h 50m
Chicago Midway
Thu 7/23
11:55 am-2:45 pm
Nonstop1h 50m
$259
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 6/30
7:38 pm-11:59 pm
1 stop5h 21m
Chicago O'Hare Intl
Fri 7/3
7:01 am-11:47 am
1 stop3h 46m
$269
BaltimoreChicago
BWI - MDW
BWIMDW
Baltimore/Washington
Fri 8/7
8:00 pm-9:00 pm
Nonstop2h 00m
Chicago Midway
Mon 8/10
9:20 am-2:40 pm
1 stop4h 20m
$270
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Tue 6/30
6:15 am-7:30 am
Nonstop2h 15m
Chicago O'Hare Intl
Sat 7/4
2:30 pm-5:36 pm
Nonstop2h 06m
$277
BaltimoreChicago
BWI - ORD
BWIORD
Baltimore/Washington
Wed 7/15
6:15 am-7:30 am
Nonstop2h 15m
Chicago O'Hare Intl
Tue 7/21
6:20 pm-9:26 pm
Nonstop2h 06m
$281
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-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-MDW
BWI-ORD
BWI-RFD
What is the cheapest month to book a flight from Baltimore to Illinois?
Currently, February is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $43). Flying from Baltimore to Illinois in August is currently the most expensive (average of $656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BWI to IL?
Find hourly flight availability from Baltimore to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 9, 2026.
When flying from Baltimore to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 33% versus a flight in the morning.
Weekly flight availability from Baltimore to Illinois
Explore weekly flight availability from Baltimore to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 9, 2026.
The most flights from BWI to USIL are scheduled on a Monday (22 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?
How far ahead should I book a flight from Baltimore to Illinois?
To ensure you get the cheapest price possible for a flight from Baltimore to Illinois, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest day to fly from Baltimore to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Baltimore to Illinois. Price data was last updated on June 8, 2026.
Travelers seeking maximum savings on their Baltimore to Illinois flight should consider departing on Friday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 9, 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
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Baltimore to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Baltimore to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Baltimore to Illinois by cabin class
Find flights from Baltimore to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Baltimore and Illinois flights
Browse other Baltimore and Illinois flight options. Last updated on June 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Baltimore to Illinois flights
Consider these flights traveling from Baltimore to Illinois.
Top 4 airlines flying from Baltimore to Illinois
Discover the top 4 airlines that operate flights from Baltimore to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$117 | Average$278 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$131 | Average$414 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$335 | FlexibilityNo cancel fee | On-time71% |