$148+ Cheap flights from Billings (BIL) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/29. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Jun 10 — Jun 171
Round-trip
1 adult, Economy
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Cheapest flights from Billings to IllinoisExplore the most affordable flight options available from Billings to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 11, 2026.
Explore the most affordable flight options available from Billings to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 11, 2026.
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Wed 10/212:02 pm
BIL
- ORD
Nonstop2h 58m
American Airlines
Sat 10/249:40 am
ORD
- BIL
Nonstop3h 02m
American Airlines
Deal found 5/8![American Airlines logo]()
$251
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 10/212:29 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 10/243:55 pm
ORD
- BIL
1 stop6h 05m
United Airlines
Deal found 5/10![United Airlines logo]()
$271
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 10/215:45 am
BIL
- ORD
1 stop5h 40m
Delta
Sat 10/241:35 pm
ORD
- BIL
2 stops9h 57m
Delta
Deal found 5/10![Delta logo]()
$276
This Delta deal was found by Cheapflights users on 5/8. 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 9/96:15 am
BIL
- MDW
1 stop5h 56m
Delta
Sat 9/122:00 pm
MDW
- BIL
1 stop6h 37m
Delta
Deal found 5/8![Delta logo]()
$281
This Delta deal was found by Cheapflights users on 5/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:20 am
BIL
- ORD
1 stop5h 40m
Delta
Wed 7/85:54 pm
ORD
- BIL
1 stop6h 26m
Delta
Deal found 5/6![Delta logo]()
$281
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 8/65:10 am
BIL
- MDW
2 stops12h 23m
Delta
Wed 8/127:25 pm
MDW
- BIL
1 stop4h 48m
Delta
Deal found 5/5![Delta logo]()
$295
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 8/66:26 am
BIL
- MDW
2 stops11h 07m
Delta
Tue 8/119:59 am
MDW
- BIL
2 stops8h 54m
Delta
Deal found 5/5![Delta logo]()
$300
This Delta deal was found by Cheapflights users on 5/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3011:50 am
BIL
- ORD
1 stop6h 08m
Delta
Fri 7/35:57 pm
ORD
- BIL
1 stop6h 03m
Delta
Deal found 5/6![Delta logo]()
$300
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 7/25:20 am
BIL
- ORD
1 stop5h 40m
Delta
Tue 7/78:27 am
ORD
- BIL
2 stops10h 25m
Delta
Deal found 5/10![Delta logo]()
$303
This Delta deal was found by Cheapflights users on 5/8. 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 9/95:45 am
BIL
- ORD
2 stops8h 13m
Delta
Sat 9/128:15 am
ORD
- BIL
2 stops12h 22m
Delta
Deal found 5/8![Delta logo]()
$310
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 8/65:10 am
BIL
- MDW
2 stops12h 23m
Delta
Thu 8/137:25 pm
MDW
- BIL
1 stop4h 48m
Delta
Deal found 5/5![Delta logo]()
$314
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 8/65:10 am
BIL
- MDW
2 stops12h 23m
Delta
Mon 8/101:27 pm
MDW
- BIL
2 stops10h 08m
Delta
Deal found 5/5![Delta logo]()
$319
Best flights from Billings to IllinoisDiscover carefully curated flight deals from Billings to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 11, 2026.
Discover carefully curated flight deals from Billings to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 11, 2026.
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 10/212:29 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 10/243:55 pm
ORD
- BIL
1 stop6h 05m
United Airlines
Deal found 5/10![United Airlines logo]()
$271
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 10/215:45 am
BIL
- ORD
1 stop5h 40m
Delta
Sat 10/241:35 pm
ORD
- BIL
2 stops9h 57m
Delta
Deal found 5/10![Delta logo]()
$276
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 7/25:20 am
BIL
- ORD
1 stop5h 40m
Delta
Tue 7/78:27 am
ORD
- BIL
2 stops10h 25m
Delta
Deal found 5/10![Delta logo]()
$303
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sat 6/66:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 6/135:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/9![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 5/7. 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.
Wed 5/276:30 am
BIL
- MDW
2 stops8h 42m
Delta
Sat 5/307:13 pm
MDW
- BIL
1 stop5h 01m
Delta
Deal found 5/7![Delta logo]()
$344
This American Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:00 am
BIL
- EVV
2 stops16h 59m
American Airlines
Tue 7/75:14 pm
EVV
- BIL
1 stop6h 59m
American Airlines
Deal found 5/10![American Airlines logo]()
$794
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Fri 6/125:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/7![United Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:20 am
BIL
- ORD
1 stop5h 39m
Delta
Mon 7/201:24 pm
ORD
- BIL
2 stops10h 26m
Delta
Deal found 5/9![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Tue 6/165:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/7![United Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 5/7. 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.
Thu 6/186:40 pm
BIL
- STL
1 stop5h 03m
Delta
Mon 6/295:36 pm
STL
- BIL
1 stop6h 24m
Delta
Deal found 5/7![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:30 am
BIL
- MDW
2 stops12h 03m
Delta
Sat 6/131:49 pm
MDW
- BIL
1 stop7h 13m
Delta
Deal found 5/9![Delta logo]()
$368
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Tue 8/252:25 pm
BIL
- STL
1 stop5h 14m
United Airlines
Sat 8/294:40 pm
STL
- BIL
1 stop5h 20m
United Airlines
Deal found 5/6![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 5/5. 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.
Mon 8/106:34 pm
BIL
- MDW
2 stops13h 06m
Delta
Sat 8/151:52 pm
MDW
- BIL
1 stop7h 20m
Delta
Deal found 5/5![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sat 6/62:25 pm
BIL
- STL
1 stop5h 32m
United Airlines
Fri 6/125:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 5/9![United Airlines logo]()
$446
This Delta deal was found by Cheapflights users on 5/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:24 am
BIL
- MDW
2 stops11h 01m
Delta
Sun 7/197:06 pm
MDW
- BIL
1 stop5h 14m
Delta
Deal found 5/6![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 5/8. 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.
Fri 5/2211:34 am
BIL
- ORD
1 stop6h 16m
Delta
Sun 5/245:00 pm
ORD
- BIL
1 stop6h 52m
Delta
Deal found 5/8![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/184:10 pm
BIL
- STL
1 stop6h 47m
United Airlines
Tue 6/235:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 5/7![United Airlines logo]()
$504
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Wed 10/142:02 pm
BIL
- MLI
1 stop8h 04m
American Airlines
Sun 10/186:22 am
MLI
- BIL
1 stop6h 20m
American Airlines
Deal found 5/8![American Airlines logo]()
$824
This Delta deal was found by Cheapflights users on 5/8. 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.
Sat 5/236:30 am
BIL
- MDW
1 stop5h 49m
Delta
Wed 5/271:59 pm
MDW
- BIL
2 stops9h 53m
Delta
Deal found 5/8![Delta logo]()
$394
This American Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 5/2612:42 pm
BIL
- EVV
1 stop10h 17m
American Airlines
Sat 5/305:30 pm
EVV
- BIL
1 stop6h 45m
American Airlines
Deal found 5/11![American Airlines logo]()
$868
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 10/216:15 am
BIL
- MDW
1 stop4h 36m
Delta
Sat 10/2410:35 am
MDW
- BIL
2 stops12h 57m
Delta
Deal found 5/10![Delta logo]()
$410
This United Airlines deal was found by Cheapflights users on 5/9. 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 5/272:25 pm
BIL
- MLI
1 stop5h 29m
United Airlines
Thu 5/288:58 am
MLI
- BIL
1 stop5h 24m
United Airlines
Deal found 5/9![United Airlines logo]()
$551
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:19 pm
BIL
- STL
2 stops14h 13m
Delta
Fri 6/125:36 pm
STL
- BIL
1 stop6h 56m
Delta
Deal found 5/9![Delta logo]()
$423
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Thu 5/282:25 pm
BIL
- MLI
1 stop5h 29m
United Airlines
Fri 5/293:47 pm
MLI
- BIL
2 stops18h 48m
United Airlines
Deal found 5/9![United Airlines logo]()
$634
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:30 am
BIL
- MDW
2 stops12h 03m
Delta
Mon 5/257:13 pm
MDW
- BIL
1 stop5h 01m
Delta
Deal found 5/9![Delta logo]()
$460
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/62:25 pm
BIL
- MLI
1 stop5h 29m
United Airlines
Tue 6/92:31 pm
MLI
- BIL
2 stops20h 04m
United Airlines
Deal found 5/10![United Airlines logo]()
$696
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/186:40 pm
BIL
- STL
1 stop5h 03m
Delta
Tue 6/233:57 pm
STL
- BIL
2 stops7h 52m
Delta
Deal found 5/10![Delta logo]()
$489
This United Airlines deal was found by Cheapflights users on 5/9. 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 6/176:00 pm
BIL
- MLI
2 stops17h 36m
United Airlines
Fri 6/196:30 pm
MLI
- BIL
2 stops16h 05m
United Airlines
Deal found 5/9![United Airlines logo]()
$738
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:40 pm
BIL
- EVV
2 stops13h 48m
Delta
Tue 7/710:06 am
EVV
- BIL
2 stops8h 46m
Delta
Deal found 5/9![Delta logo]()
$521
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:30 am
BIL
- MLI
2 stops9h 07m
Delta
Fri 5/2911:00 am
MLI
- BIL
2 stops12h 52m
Delta
Deal found 5/9![Delta logo]()
$525
Last-minute flights from Billings to IllinoisDiscover last-minute flight deals from Billings to Illinois. Data last updated May 11, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Illinois. Data last updated May 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Thu 5/216:00 pm
BIL
- STL
1 stop4h 57m
United Airlines
Mon 5/255:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 5/6![United Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/226:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Mon 5/255:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/7![United Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 5/8. 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 5/2312:42 pm
BIL
- ORD
Nonstop3h 02m
American Airlines
Wed 5/279:45 am
ORD
- BIL
Nonstop3h 27m
American Airlines
Deal found 5/8![American Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 5/7. 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.
Wed 5/2712:42 pm
BIL
- ORD
Nonstop3h 02m
American Airlines
Sat 5/303:02 pm
ORD
- BIL
1 stop9h 13m
American Airlines
Deal found 5/7![American Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 5/7. 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.
Wed 5/276:30 am
BIL
- MDW
1 stop5h 49m
Delta
Sat 5/307:13 pm
MDW
- BIL
1 stop5h 01m
Delta
Deal found 5/7![Delta logo]()
$339
This Delta deal was found by Cheapflights users on 5/7. 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.
Wed 5/2711:34 am
BIL
- ORD
1 stop6h 16m
Delta
Sat 5/301:44 pm
ORD
- BIL
2 stops10h 30m
Delta
Deal found 5/7![Delta logo]()
$344
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:30 am
BIL
- MDW
2 stops12h 03m
Delta
Sat 6/131:49 pm
MDW
- BIL
1 stop7h 13m
Delta
Deal found 5/9![Delta logo]()
$368
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/176:24 am
BIL
- MDW
1 stop5h 45m
Delta
Fri 6/197:16 pm
MDW
- BIL
1 stop5h 16m
Delta
Deal found 5/10![Delta logo]()
$325
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/175:20 am
BIL
- ORD
1 stop5h 40m
Delta
Fri 6/195:57 pm
ORD
- BIL
1 stop6h 35m
Delta
Deal found 5/10![Delta logo]()
$352
This Delta deal was found by Cheapflights users on 5/7. 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.
Thu 6/186:40 pm
BIL
- STL
1 stop5h 03m
Delta
Mon 6/295:36 pm
STL
- BIL
1 stop6h 24m
Delta
Deal found 5/7![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 5/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:20 am
BIL
- ORD
1 stop5h 40m
Delta
Wed 7/85:54 pm
ORD
- BIL
1 stop6h 26m
Delta
Deal found 5/6![Delta logo]()
$281
This Delta deal was found by Cheapflights users on 5/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3011:50 am
BIL
- ORD
1 stop6h 08m
Delta
Fri 7/35:57 pm
ORD
- BIL
1 stop6h 03m
Delta
Deal found 5/6![Delta logo]()
$300
One-way flights from Billings to IllinoisSearch for one-way flight options from Billings to Illinois. Find affordable one-way fares based on user searches. Data last updated May 11, 2026.
Search for one-way flight options from Billings to Illinois. Find affordable one-way fares based on user searches. Data last updated May 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Mon 6/2910:00 am
BIL
- ORD
2 stops33h 43m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$148
This American Airlines deal was found by Cheapflights users on 5/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:17 pm
BIL
- ORD
Nonstop2h 53m
American Airlines
Deal found 5/9![American Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 7/39:59 am
BIL
- ORD
1 stop18h 08m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Mon 6/110:00 am
BIL
- STL
2 stops32h 23m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$159
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:15 am
BIL
- MDW
1 stop5h 56m
Delta
Deal found 5/9![Delta logo]()
$163
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/55:20 am
BIL
- ORD
1 stop5h 40m
Delta
Deal found 5/9![Delta logo]()
$163
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:26 am
BIL
- ORD
2 stops11h 02m
Delta
Deal found 5/9![Delta logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 8/39:59 am
BIL
- ORD
2 stops32h 54m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$183
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/106:24 am
BIL
- MDW
1 stop5h 45m
Delta
Deal found 5/10![Delta logo]()
$190
This Delta deal was found by Cheapflights users on 5/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:20 am
BIL
- ORD
1 stop5h 40m
Delta
Deal found 5/9![Delta logo]()
$190
This Delta deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:10 am
BIL
- ORD
2 stops10h 44m
Delta
Deal found 5/11![Delta logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 5/2910:00 am
BIL
- STL
2 stops21h 55m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$233
Find flight deals from Billings to Illinois
Keep the following information in mind while searching for Billings to Illinois flight deals. Data was last updated May 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (American Airlines) |
One-way from | $148 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $505 |
Good round-trip deal | $519 or less |
Good one-way deal | $251 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Billings 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 May 11, 2026.
Use the filters below to find and compare flights from Billings to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Wed 10/21
2:29 pm-9:13 pm
1 stop5h 44m
Chicago O'Hare Intl
Sat 10/24
3:55 pm-9:00 pm
1 stop6h 05m
$271
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Wed 10/21
5:45 am-12:25 pm
1 stop5h 40m
Chicago O'Hare Intl
Sat 10/24
1:35 pm-10:32 pm
2 stops9h 57m
$276
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Thu 7/2
5:20 am-12:00 pm
1 stop5h 40m
Chicago O'Hare Intl
Tue 7/7
8:27 am-5:52 pm
2 stops10h 25m
$303
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Sat 6/6
6:00 pm-12:44 am
1 stop5h 44m
Chicago O'Hare Intl
Sat 6/13
5:00 am-9:35 am
1 stop5h 35m
$334
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Wed 5/27
6:30 am-4:12 pm
2 stops8h 42m
Chicago Midway
Sat 5/30
7:13 pm-11:14 pm
1 stop5h 01m
$344
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Mon 7/13
5:20 am-11:59 am
1 stop5h 39m
Chicago O'Hare Intl
Mon 7/20
1:24 pm-10:50 pm
2 stops10h 26m
$357
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Thu 6/18
6:40 pm-12:43 am
1 stop5h 03m
Lambert-St Louis
Mon 6/29
5:36 pm-11:00 pm
1 stop6h 24m
$359
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Sat 6/6
5:30 am-6:33 pm
2 stops12h 03m
Chicago Midway
Sat 6/13
1:49 pm-8:02 pm
1 stop7h 13m
$368
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Mon 8/10
6:34 pm-8:40 am
2 stops13h 06m
Chicago Midway
Sat 8/15
1:52 pm-8:12 pm
1 stop7h 20m
$373
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Thu 7/9
6:24 am-6:25 pm
2 stops11h 01m
Chicago Midway
Sun 7/19
7:06 pm-11:20 pm
1 stop5h 14m
$379
Showing 1-10 of 52 resultsSorted by cheapest first
Best time to book a flight from Billings to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Billings with our price prediction graph.
BIL-ORD
BIL-MDW
BIL-STL
BIL-EVV
BIL-MLI
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 Billings to Illinois
BIL-USIL
BIL-ORD
BIL-MDW
BIL-STL
BIL-EVV
What is the cheapest month to book a flight from Billings to Illinois?
Currently, July is the cheapest month in which you can book a flight from Billings to Illinois (average of $191). Flying from Billings to Illinois in November is currently the most expensive (average of $299). 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.
How much does it cost to fly round-trip from Billings 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 May 11, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Billings to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Billings 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 Billings 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 Billings to Illinois by cabin class
Find flights from Billings to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Billings and Illinois flights
Browse other Billings and Illinois flight options. Last updated on May 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Billings to Illinois flights
Consider these flights traveling from Billings to Illinois.
Top 3 airlines flying from Billings to Illinois
Discover the top 3 airlines that operate flights from Billings 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 May 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$210 | Average$492 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$225 | Average$390 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$249 | Average$399 | FlexibilityNo cancel fee | On-time69% |