$106+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Mar 9 — Mar 161
1 adult, Economy
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Find cheap flights from Billings to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 February 7, 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 February 7, 2026.
This Delta deal was found by Cheapflights users on 2/5. 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 3/246:25 am
BIL
- MDW
1 stop6h 00m
Delta
Tue 3/312:05 pm
MDW
- BIL
1 stop7h 14m
Delta
Deal found 2/5![Delta logo]()
$211
This Delta deal was found by Cheapflights users on 2/5. 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 3/246:25 am
BIL
- ORD
1 stop4h 10m
Delta
Wed 4/83:59 pm
ORD
- BIL
1 stop5h 20m
Delta
Deal found 2/5![Delta logo]()
$211
This Delta deal was found by Cheapflights users on 2/5. 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.
Sat 5/95:35 am
BIL
- ORD
1 stop5h 17m
Delta
Wed 5/135:43 pm
ORD
- BIL
1 stop6h 20m
Delta
Deal found 2/5![Delta logo]()
$249
This American Airlines deal was found by Cheapflights users on 2/6. 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.
Thu 8/276:00 am
BIL
- ORD
Nonstop2h 51m
American Airlines
Mon 8/318:46 pm
ORD
- BIL
Nonstop3h 13m
American Airlines
Deal found 2/6![American Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 2/6. 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.
Fri 2/276:20 am
BIL
- ORD
1 stop4h 25m
Delta
Mon 3/210:35 am
ORD
- BIL
2 stops10h 04m
Delta
Deal found 2/6![Delta logo]()
$254
This Delta deal was found by Cheapflights users on 2/5. 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 3/245:15 am
BIL
- ORD
1 stop6h 03m
Delta
Tue 3/3111:10 am
ORD
- BIL
2 stops12h 19m
Delta
Deal found 2/5![Delta logo]()
$256
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Sat 3/72:35 pm
BIL
- ORD
1 stop7h 20m
United Airlines
Sat 3/147:00 am
ORD
- BIL
1 stop7h 23m
United Airlines
Deal found 2/6![United Airlines logo]()
$268
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 7/26:15 am
BIL
- MDW
1 stop5h 52m
Delta
Sat 7/116:45 pm
MDW
- BIL
1 stop4h 52m
Delta
Deal found 2/4![Delta logo]()
$270
This Delta deal was found by Cheapflights users on 2/5. 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.
Sat 5/96:25 am
BIL
- MDW
1 stop5h 54m
Delta
Wed 5/137:00 pm
MDW
- BIL
1 stop5h 03m
Delta
Deal found 2/5![Delta logo]()
$274
This Delta deal was found by Cheapflights users on 2/4. 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.
Sat 3/216:25 am
BIL
- ORD
1 stop4h 05m
Delta
Sat 3/285:00 pm
ORD
- BIL
1 stop6h 29m
Delta
Deal found 2/4![Delta logo]()
$274
This Delta deal was found by Cheapflights users on 2/4. 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 4/126:21 pm
BIL
- STL
1 stop5h 00m
Delta
Wed 4/223:25 pm
STL
- BIL
1 stop5h 41m
Delta
Deal found 2/4![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 2/4. 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.
Wed 4/15:15 am
BIL
- STL
2 stops8h 09m
Delta
Sat 4/183:25 pm
STL
- BIL
2 stops7h 59m
Delta
Deal found 2/4![Delta logo]()
$289
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 February 7, 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 February 7, 2026.
This Delta deal was found by Cheapflights users on 2/5. 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 3/246:25 am
BIL
- ORD
1 stop4h 10m
Delta
Wed 4/83:59 pm
ORD
- BIL
1 stop5h 20m
Delta
Deal found 2/5![Delta logo]()
$211
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Fri 2/275:53 pm
BIL
- ORD
1 stop5h 06m
United Airlines
Mon 3/22:40 pm
ORD
- BIL
1 stop7h 41m
United Airlines
Deal found 2/6![United Airlines logo]()
$249
This Alaska Airlines deal was found by Cheapflights users on 2/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:32 pm
BIL
- ORD
1 stop20h 39m
Alaska Airlines
Wed 3/113:54 pm
ORD
- BIL
1 stop8h 44m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 2/5. 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 3/246:25 am
BIL
- MDW
1 stop6h 00m
Delta
Tue 3/3110:45 am
MDW
- BIL
2 stops12h 44m
Delta
Deal found 2/5![Delta logo]()
$216
This American Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/191:48 pm
BIL
- EVV
1 stop7h 58m
American Airlines
Mon 2/233:50 pm
EVV
- BIL
1 stop7h 22m
American Airlines
Deal found 2/3![American Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Thu 4/92:35 pm
BIL
- STL
1 stop5h 19m
United Airlines
Sat 4/182:40 pm
STL
- BIL
1 stop7h 17m
United Airlines
Deal found 2/4![United Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 2/6. 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.
Fri 2/276:20 am
BIL
- ORD
1 stop4h 25m
Delta
Mon 3/210:35 am
ORD
- BIL
2 stops10h 04m
Delta
Deal found 2/6![Delta logo]()
$254
This Delta deal was found by Cheapflights users on 2/5. 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 3/245:15 am
BIL
- ORD
1 stop6h 03m
Delta
Tue 3/3111:10 am
ORD
- BIL
2 stops12h 19m
Delta
Deal found 2/5![Delta logo]()
$256
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Sat 2/215:53 pm
BIL
- ORD
1 stop5h 06m
United Airlines
Wed 2/258:40 am
ORD
- BIL
1 stop5h 43m
United Airlines
Deal found 2/6![United Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 7/26:15 am
BIL
- MDW
1 stop5h 52m
Delta
Sat 7/116:45 pm
MDW
- BIL
1 stop4h 52m
Delta
Deal found 2/4![Delta logo]()
$270
This Alaska Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:21 pm
BIL
- STL
1 stop19h 29m
Alaska Airlines
Thu 5/287:56 pm
STL
- BIL
1 stop18h 20m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$380
This Delta deal was found by Cheapflights users on 2/4. 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.
Sat 5/96:25 am
BIL
- MDW
1 stop5h 54m
Delta
Wed 5/137:00 pm
MDW
- BIL
1 stop5h 03m
Delta
Deal found 2/4![Delta logo]()
$274
This Delta deal was found by Cheapflights users on 2/4. 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.
Sat 3/216:25 am
BIL
- ORD
1 stop4h 05m
Delta
Sat 3/285:00 pm
ORD
- BIL
1 stop6h 29m
Delta
Deal found 2/4![Delta logo]()
$274
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Thu 2/197:00 am
BIL
- STL
1 stop5h 14m
United Airlines
Mon 2/239:55 am
STL
- BIL
2 stops12h 26m
United Airlines
Deal found 2/4![United Airlines logo]()
$376
This Delta deal was found by Cheapflights users on 2/4. 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 4/126:21 pm
BIL
- STL
1 stop5h 00m
Delta
Sat 4/183:25 pm
STL
- BIL
1 stop5h 41m
Delta
Deal found 2/4![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/185:51 pm
BIL
- STL
2 stops26h 17m
United Airlines
Thu 5/285:15 am
STL
- BIL
1 stop5h 24m
United Airlines
Deal found 2/3![United Airlines logo]()
$392
This Delta deal was found by Cheapflights users on 2/4. 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 4/126:21 pm
BIL
- STL
1 stop5h 00m
Delta
Wed 4/223:25 pm
STL
- BIL
1 stop5h 41m
Delta
Deal found 2/4![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 2/6. 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.
Sat 2/211:48 pm
BIL
- MLI
1 stop8h 40m
American Airlines
Wed 2/253:33 pm
MLI
- BIL
1 stop7h 39m
American Airlines
Deal found 2/6![American Airlines logo]()
$575
This Delta deal was found by Cheapflights users on 2/4. 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.
Wed 4/15:15 am
BIL
- STL
2 stops8h 09m
Delta
Sat 4/183:25 pm
STL
- BIL
2 stops7h 59m
Delta
Deal found 2/4![Delta logo]()
$289
This American Airlines deal was found by Cheapflights users on 2/4. 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.
Thu 7/212:36 pm
BIL
- EVV
1 stop10h 20m
American Airlines
Tue 7/75:30 pm
EVV
- BIL
1 stop6h 15m
American Airlines
Deal found 2/4![American Airlines logo]()
$611
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Sat 2/217:00 am
BIL
- MLI
2 stops11h 02m
United Airlines
Wed 2/258:49 am
MLI
- BIL
1 stop5h 34m
United Airlines
Deal found 2/6![United Airlines logo]()
$473
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 2/195:10 am
BIL
- ORD
1 stop6h 09m
Delta
Mon 2/233:59 pm
ORD
- BIL
1 stop4h 40m
Delta
Deal found 2/4![Delta logo]()
$299
This Delta deal was found by Cheapflights users on 2/6. 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.
Fri 2/276:20 am
BIL
- MDW
2 stops10h 17m
Delta
Mon 3/21:49 pm
MDW
- BIL
1 stop6h 50m
Delta
Deal found 2/6![Delta logo]()
$309
This Delta deal was found by Cheapflights users on 2/6. 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 3/75:10 am
BIL
- MDW
2 stops10h 04m
Delta
Sat 3/142:05 pm
MDW
- BIL
1 stop7h 14m
Delta
Deal found 2/6![Delta logo]()
$309
This Delta deal was found by Cheapflights users on 2/6. 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 2/215:10 am
BIL
- MDW
2 stops10h 04m
Delta
Wed 2/251:49 pm
MDW
- BIL
1 stop6h 50m
Delta
Deal found 2/6![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 3/266:25 am
BIL
- MDW
1 stop6h 00m
Delta
Mon 3/302:05 pm
MDW
- BIL
1 stop7h 14m
Delta
Deal found 2/4![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 2/6. 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.
Fri 3/276:25 am
BIL
- MDW
1 stop6h 00m
Delta
Mon 3/302:05 pm
MDW
- BIL
1 stop7h 14m
Delta
Deal found 2/6![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 2/6. 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.
Mon 5/186:20 pm
BIL
- STL
1 stop5h 10m
Delta
Thu 5/281:50 pm
STL
- BIL
2 stops10h 13m
Delta
Deal found 2/6![Delta logo]()
$394
This Delta deal was found by Cheapflights users on 2/5. 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 3/166:25 am
BIL
- STL
1 stop6h 59m
Delta
Fri 3/203:05 pm
STL
- BIL
1 stop6h 14m
Delta
Deal found 2/5![Delta logo]()
$439
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 7/26:25 pm
BIL
- EVV
2 stops14h 01m
Delta
Tue 7/710:05 am
EVV
- BIL
2 stops13h 22m
Delta
Deal found 2/4![Delta logo]()
$705
Last-minute flights from Billings to IllinoisDiscover last-minute flight deals from Billings to Illinois. Data last updated February 7, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Illinois. Data last updated February 7, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 2/6. 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.
Wed 2/186:20 am
BIL
- MDW
2 stops10h 17m
Delta
Mon 2/231:49 pm
MDW
- BIL
1 stop6h 50m
Delta
Deal found 2/6![Delta logo]()
$354
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 2/196:20 am
BIL
- MDW
1 stop5h 45m
Delta
Mon 2/231:49 pm
MDW
- BIL
1 stop6h 50m
Delta
Deal found 2/4![Delta logo]()
$299
This Delta deal was found by Cheapflights users on 2/4. 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.
Thu 2/195:10 am
BIL
- ORD
1 stop6h 09m
Delta
Mon 2/233:59 pm
ORD
- BIL
1 stop4h 40m
Delta
Deal found 2/4![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 2/6. 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.
Fri 2/275:53 pm
BIL
- ORD
1 stop5h 06m
United Airlines
Mon 3/22:40 pm
ORD
- BIL
1 stop7h 41m
United Airlines
Deal found 2/6![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 2/6. 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.
Fri 2/276:20 am
BIL
- ORD
1 stop4h 25m
Delta
Mon 3/210:35 am
ORD
- BIL
2 stops10h 04m
Delta
Deal found 2/6![Delta logo]()
$254
This Delta deal was found by Cheapflights users on 2/6. 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.
Fri 2/276:20 am
BIL
- MDW
2 stops10h 17m
Delta
Mon 3/21:49 pm
MDW
- BIL
1 stop6h 50m
Delta
Deal found 2/6![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 2/5. 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.
Sat 3/72:35 pm
BIL
- ORD
1 stop5h 54m
United Airlines
Sat 3/147:00 am
ORD
- BIL
1 stop7h 23m
United Airlines
Deal found 2/5![United Airlines logo]()
$268
This Alaska Airlines deal was found by Cheapflights users on 2/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:32 pm
BIL
- ORD
1 stop20h 39m
Alaska Airlines
Wed 3/113:54 pm
ORD
- BIL
1 stop8h 44m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 2/4. 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.
Sat 3/216:25 am
BIL
- ORD
1 stop4h 05m
Delta
Sat 3/285:00 pm
ORD
- BIL
1 stop6h 29m
Delta
Deal found 2/4![Delta logo]()
$274
This Delta deal was found by Cheapflights users on 2/5. 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 3/246:25 am
BIL
- MDW
1 stop6h 00m
Delta
Tue 3/312:05 pm
MDW
- BIL
1 stop7h 14m
Delta
Deal found 2/5![Delta logo]()
$211
This Delta deal was found by Cheapflights users on 2/5. 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 3/246:25 am
BIL
- ORD
1 stop4h 10m
Delta
Wed 4/83:59 pm
ORD
- BIL
1 stop5h 20m
Delta
Deal found 2/5![Delta logo]()
$211
This Delta deal was found by Cheapflights users on 2/5. 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 3/245:15 am
BIL
- ORD
1 stop6h 03m
Delta
Tue 3/3111:10 am
ORD
- BIL
2 stops12h 19m
Delta
Deal found 2/5![Delta logo]()
$256
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 February 7, 2026.
Search for one-way flight options from Billings to Illinois. Find affordable one-way fares based on user searches. Data last updated February 7, 2026.
This Delta deal was found by Cheapflights users on 2/4. 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.
Wed 4/16:25 am
BIL
- ORD
1 stop4h 10m
Delta
Deal found 2/4![Delta logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Mon 3/99:59 am
BIL
- ORD
1 stop19h 09m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 2/5. 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.
Mon 5/410:34 am
BIL
- ORD
1 stop19h 13m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$123
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:06 pm
BIL
- ORD
1 stop8h 53m
Alaska Airlines
Deal found 2/4![Alaska Airlines logo]()
$139
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/22:04 pm
BIL
- ORD
1 stop8h 52m
Alaska Airlines
Deal found 2/4![Alaska Airlines logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 3/69:59 am
BIL
- ORD
1 stop19h 09m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$155
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:53 pm
BIL
- ORD
1 stop5h 06m
United Airlines
Deal found 2/3![United Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 2/6. 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 5/810:04 am
BIL
- ORD
1 stop19h 43m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$171
This Delta deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:20 am
BIL
- MDW
1 stop5h 45m
Delta
Deal found 2/3![Delta logo]()
$186
This American Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/31:48 pm
BIL
- MLI
1 stop8h 40m
American Airlines
Deal found 2/3![American Airlines logo]()
$191
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:00 am
BIL
- MLI
2 stops11h 02m
United Airlines
Deal found 2/3![United Airlines logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 5/1110:34 am
BIL
- STL
2 stops35h 45m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$198
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 February 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $211 (Delta) |
One-way from | $106 (Delta) |
Popular in | November |
Cheapest in | January |
Average price | $423 |
Good round-trip deal | $501 or less |
Good one-way deal | $238 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 February 7, 2026.
Use the filters below to find and compare flights from Billings to Illinois that are best for you.
Fly from
Billings
Fly to
Illinois
Route
Depart
Return
Price
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Tue 3/24
6:25 am-11:35 am
1 stop4h 10m
Chicago O'Hare Intl
Wed 4/8
3:59 pm-8:19 pm
1 stop5h 20m
$211
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Tue 3/24
6:25 am-1:25 pm
1 stop6h 00m
Chicago Midway
Tue 3/31
10:45 am-10:29 pm
2 stops12h 44m
$216
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Fri 2/27
5:53 pm-11:59 pm
1 stop5h 06m
Chicago O'Hare Intl
Mon 3/2
2:40 pm-9:21 pm
1 stop7h 41m
$249
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Fri 2/27
6:20 am-11:45 am
1 stop4h 25m
Chicago O'Hare Intl
Mon 3/2
10:35 am-7:39 pm
2 stops10h 04m
$254
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Tue 3/24
5:15 am-12:18 pm
1 stop6h 03m
Chicago O'Hare Intl
Tue 3/31
11:10 am-10:29 pm
2 stops12h 19m
$256
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Thu 7/2
6:15 am-1:07 pm
1 stop5h 52m
Chicago Midway
Sat 7/11
6:45 pm-10:37 pm
1 stop4h 52m
$270
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Sat 5/9
6:25 am-1:19 pm
1 stop5h 54m
Chicago Midway
Wed 5/13
7:00 pm-11:03 pm
1 stop5h 03m
$274
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Sat 3/21
6:25 am-11:30 am
1 stop4h 05m
Chicago O'Hare Intl
Sat 3/28
5:00 pm-10:29 pm
1 stop6h 29m
$274
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Thu 4/9
2:35 pm-8:54 pm
1 stop5h 19m
Lambert-St Louis
Sat 4/18
2:40 pm-8:57 pm
1 stop7h 17m
$279
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Sun 4/12
6:21 pm-12:21 am
1 stop5h 00m
Lambert-St Louis
Sat 4/18
3:25 pm-8:06 pm
1 stop5h 41m
$279
Showing 1-10 of 59 results
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-MLI
BIL-STL
BIL-MDW
BIL-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 Billings to Illinois
BIL-USIL
BIL-ORD
BIL-MLI
BIL-STL
BIL-MDW
What is the cheapest month to book a flight from Billings to Illinois?
Currently, September is the cheapest month in which you can book a flight from Billings to Illinois (average of $217). Flying from Billings to Illinois in December is currently the most expensive (average of $347). 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.
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 February 7, 2026.
See what other customers who have flown with Delta, United Airlines, and American 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.
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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
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Billings and Illinois flights
Browse other Billings and Illinois flight options. Last updated on February 7, 2026.
Popular flight searches
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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 February 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$225 | Average$371 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$239 | Average$406 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$248 | Average$433 | FlexibilityNo cancel fee | On-timeN/A |