$124+ Cheap flights from Colorado Springs (COS) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Oct 14 — Oct 211
Round-trip
1 adult, Economy
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Find cheap flights from Colorado Springs 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 Colorado Springs to IllinoisExplore the most affordable flight options available from Colorado Springs to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
Explore the most affordable flight options available from Colorado Springs to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:05 pm -
Nonstop2h 20m
Tue 10/273:35 pm -
Nonstop2h 35m
Deal found 9/11![Southwest logo]()
$293
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/71:34 pm -
Nonstop2h 55m
Tue 11/1011:00 am -
Nonstop3h 04m
Deal found 9/10![American Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:05 pm -
Nonstop2h 20m
Wed 11/45:00 pm -
1 stop6h 00m
Deal found 9/14![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:05 pm -
Nonstop2h 20m
Mon 10/55:15 am -
1 stop6h 00m
Deal found 9/9![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/16:03 pm -
1 stop4h 56m
Mon 10/59:03 am -
Nonstop2h 52m
Deal found 9/10![United Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 9/10. 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.
Tue 10/271:31 pm -
1 stop8h 02m
Sat 10/316:04 am -
1 stop7h 17m
Deal found 9/10![Delta logo]()
$313
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 10/261:31 pm -
1 stop6h 07m
Tue 11/32:03 pm -
1 stop9h 19m
Deal found 9/10![Delta logo]()
$313
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/71:26 pm -
1 stop8h 07m
Tue 11/101:31 pm -
2 stops9h 51m
Deal found 9/10![Delta logo]()
$318
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/76:00 am -
1 stop7h 28m
Tue 11/1011:19 am -
2 stops10h 31m
Deal found 9/10![Delta logo]()
$318
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/78:00 am -
1 stop6h 48m
Wed 11/114:43 pm -
1 stop7h 18m
Deal found 9/10![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 9/9. 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 11/131:31 pm -
1 stop8h 37m
Mon 11/166:00 am -
1 stop7h 26m
Deal found 9/9![Delta logo]()
$319
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/78:00 am -
1 stop6h 28m
Wed 11/113:58 pm -
1 stop8h 03m
Deal found 9/10![American Airlines logo]()
$319
Best flights from Colorado Springs to IllinoisDiscover carefully curated flight deals from Colorado Springs to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
Discover carefully curated flight deals from Colorado Springs to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/76:00 am -
1 stop8h 17m
Tue 11/101:05 pm -
1 stop8h 45m
Deal found 9/10![Delta logo]()
$313
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/15:08 pm -
1 stop4h 38m
Tue 10/65:00 am -
1 stop4h 40m
Deal found 9/9![United Airlines logo]()
$313
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:05 pm -
Nonstop2h 20m
Sat 10/35:10 am -
1 stop7h 20m
Deal found 9/10![Southwest logo]()
$319
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 11/148:00 am -
1 stop7h 43m
Sat 11/215:13 pm -
1 stop7h 43m
Deal found 9/11![American Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 9/9. 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 11/131:31 pm -
1 stop8h 37m
Mon 11/166:00 am -
1 stop7h 26m
Deal found 9/9![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:00 pm -
1 stop6h 20m
Tue 10/2011:30 am -
2 stops9h 25m
Deal found 9/10![Southwest logo]()
$334
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/3012:01 pm -
Nonstop2h 45m
Fri 10/97:47 pm -
Nonstop3h 06m
Deal found 9/9![United Airlines logo]()
$361
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:08 pm -
1 stop6h 10m
Sat 10/312:08 pm -
1 stop5h 21m
Deal found 9/14![American Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 9/10. 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.
Fri 10/28:15 am -
2 stops12h 18m
Sat 10/38:55 am -
2 stops9h 36m
Deal found 9/10![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2212:40 pm -
1 stop11h 15m
Thu 11/261:10 pm -
1 stop4h 10m
Deal found 9/13![Southwest logo]()
$368
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/141:20 pm -
2 stops7h 02m
Sat 11/213:39 pm -
2 stops6h 43m
Deal found 9/11![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:31 pm -
1 stop8h 05m
Sat 11/76:06 am -
2 stops12h 21m
Deal found 9/12![Delta logo]()
$344
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/253:54 pm -
1 stop6h 21m
Tue 9/2912:31 pm -
1 stop4h 58m
Deal found 9/10![American Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/54:40 pm -
2 stops7h 30m
Sun 11/85:15 am -
1 stop7h 20m
Deal found 9/13![Southwest logo]()
$371
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 10/28:00 am -
Nonstop2h 59m
Sat 10/39:03 am -
Nonstop2h 52m
Deal found 9/10![United Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 1/115:55 pm -
2 stops13h 57m
Mon 1/1812:30 pm -
2 stops11h 00m
Deal found 9/10![Delta logo]()
$375
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:29 pm -
2 stops8h 09m
Sat 10/310:49 am -
2 stops7h 17m
Deal found 9/14![United Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
2 stops8h 45m
Sun 11/16:10 am -
1 stop4h 15m
Deal found 9/11![Southwest logo]()
$380
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/303:58 pm -
1 stop5h 05m
Sun 11/17:11 am -
1 stop5h 53m
Deal found 9/13![American Airlines logo]()
$450
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:50 pm -
1 stop8h 25m
Sat 10/1711:15 am -
Nonstop2h 35m
Deal found 9/9![Southwest logo]()
$391
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/35:07 pm -
1 stop5h 52m
Sat 10/107:00 am -
1 stop4h 44m
Deal found 9/10![United Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 10/36:00 am -
1 stop5h 32m
Sun 10/46:00 am -
1 stop7h 14m
Deal found 9/10![Delta logo]()
$395
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:00 am -
Nonstop2h 59m
Mon 10/267:50 pm -
Nonstop3h 07m
Deal found 9/13![United Airlines logo]()
$396
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 10/56:11 pm -
1 stop5h 33m
Wed 10/710:14 am -
2 stops13h 08m
Deal found 9/10![Delta logo]()
$400
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:58 pm -
1 stop6h 25m
Mon 10/194:42 pm -
1 stop7h 49m
Deal found 9/13![American Airlines logo]()
$485
This Southwest deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:00 pm -
2 stops7h 20m
Tue 10/136:30 am -
1 stop4h 15m
Deal found 9/12![Southwest logo]()
$407
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/312:55 pm -
1 stop5h 11m
Tue 11/38:41 am -
1 stop4h 40m
Deal found 9/9![United Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 10/103:58 pm -
2 stops7h 11m
Sat 10/176:00 am -
2 stops10h 00m
Deal found 9/11![American Airlines logo]()
$487
This Delta deal was found by Cheapflights users on 9/11. 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.
Tue 10/206:07 pm -
2 stops14h 02m
Sat 10/243:35 pm -
2 stops7h 47m
Deal found 9/11![Delta logo]()
$412
This United Airlines deal was found by Cheapflights users on 9/10. 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 1/271:50 pm -
1 stop6h 13m
Sat 1/302:31 pm -
1 stop8h 24m
Deal found 9/10![United Airlines logo]()
$399
Last-minute flights from Colorado Springs to IllinoisDiscover last-minute flight deals from Colorado Springs to Illinois. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado Springs to Illinois. Data last updated September 14, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:05 pm -
Nonstop2h 20m
Mon 10/55:15 am -
1 stop6h 00m
Deal found 9/9![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/16:03 pm -
1 stop4h 56m
Mon 10/59:03 am -
Nonstop2h 52m
Deal found 9/10![United Airlines logo]()
$303
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:05 pm -
Nonstop2h 20m
Sat 10/35:10 am -
1 stop7h 20m
Deal found 9/10![Southwest logo]()
$319
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 10/211:57 am -
Nonstop2h 45m
Sat 10/33:50 pm -
1 stop5h 19m
Deal found 9/10![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:10 pm -
1 stop8h 30m
Tue 10/611:30 am -
2 stops9h 25m
Deal found 9/9![Southwest logo]()
$318
This Delta deal was found by Cheapflights users on 9/9. 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 10/56:11 pm -
2 stops12h 30m
Tue 10/61:23 pm -
1 stop7h 53m
Deal found 9/9![Delta logo]()
$318
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/1412:01 pm -
Nonstop2h 45m
Sat 10/317:50 pm -
Nonstop3h 07m
Deal found 9/9![United Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:05 pm -
Nonstop2h 20m
Tue 10/273:35 pm -
Nonstop2h 35m
Deal found 9/11![Southwest logo]()
$293
This Delta deal was found by Cheapflights users on 9/10. 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.
Fri 10/231:31 pm -
1 stop8h 02m
Thu 10/296:04 am -
1 stop7h 26m
Deal found 9/10![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 10/261:31 pm -
1 stop6h 07m
Thu 10/295:27 am -
1 stop8h 03m
Deal found 9/10![Delta logo]()
$313
This Delta deal was found by Cheapflights users on 9/10. 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.
Tue 10/271:31 pm -
1 stop8h 02m
Thu 10/2912:49 pm -
1 stop8h 27m
Deal found 9/10![Delta logo]()
$313
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:05 pm -
Nonstop2h 20m
Wed 11/45:00 pm -
1 stop6h 00m
Deal found 9/14![Southwest logo]()
$297
One-way flights from Colorado Springs to IllinoisSearch for one-way flight options from Colorado Springs to Illinois. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
Search for one-way flight options from Colorado Springs to Illinois. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:40 pm -
Nonstop2h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Southwest logo]()
$124
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:10 pm -
1 stop6h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Southwest logo]()
$134
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 12/81:34 pm -
Nonstop2h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![American Airlines logo]()
$147
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/101:40 pm -
1 stop8h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Southwest logo]()
$157
This Delta deal was found by Cheapflights users on 9/10. 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.
Tue 12/81:40 pm -
1 stop6h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/78:17 am -
2 stops13h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$162
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/76:07 pm -
2 stops13h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$162
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 11/231:28 pm -
1 stop6h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$167
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 12/71:40 pm -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 9/10. 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 12/98:00 am -
2 stops13h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$172
This Delta deal was found by Cheapflights users on 9/9. 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 12/111:40 pm -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Delta logo]()
$173
This Delta deal was found by Cheapflights users on 9/10. 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.
Fri 12/111:40 pm -
1 stop6h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$173
Find flight deals from Colorado Springs to Illinois
Keep the following information in mind while searching for Colorado Springs to Illinois flight deals. Data was last updated September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $272 (Southwest) |
One-way from | $124 (Southwest) |
Popular in | July |
Cheapest in | August |
Average price | $382 |
Good round-trip deal | $374 or less |
Good one-way deal | $178 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado Springs 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 7,457,451 searches. Data last updated September 14, 2026.
Use the filters below to find and compare flights from Colorado Springs to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Colorado SpringsChicago
COS Colorado Springs - MDW Chicago Midway
COSMDW
Colorado Springs
Wed 10/21
3:20 pm-10:20 pm
1 stop6h 00m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$134
Quickest round-trip
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Thu 10/22
11:57 am-3:42 pm
Nonstop2h 45m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$147
Colorado SpringsChicago
COS Colorado Springs - MDW Chicago Midway
COSMDW
Colorado Springs
Tue 11/10
1:31 pm-10:54 pm
1 stop8h 23m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$157
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Tue 12/8
1:40 pm-8:49 pm
1 stop6h 09m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$157
Colorado SpringsChicago
COS Colorado Springs - MDW Chicago Midway
COSMDW
Colorado Springs
Tue 1/5
6:55 am-4:15 pm
2 stops8h 20m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$162
Colorado SpringsSt. Louis
COS Colorado Springs - STL Lambert-St Louis
COSSTL
Colorado Springs
Mon 11/23
1:28 pm-8:59 pm
1 stop6h 31m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$167
Colorado SpringsSt. Louis
COS Colorado Springs - STL Lambert-St Louis
COSSTL
Colorado Springs
Mon 11/23
6:08 pm-12:40 am
1 stop5h 32m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$167
Colorado SpringsSt. Louis
COS Colorado Springs - STL Lambert-St Louis
COSSTL
Colorado Springs
Fri 10/2
4:20 pm-12:35 am
1 stop7h 15m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$178
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Sat 12/12
5:45 am-9:36 am
Nonstop2h 51m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$196
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Tue 11/24
8:14 am-6:05 pm
1 stop8h 51m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$196
Showing 1-10 of 58 resultsSorted by cheapest first
Best time to book a flight from Colorado Springs to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Colorado Springs with our price prediction graph.
COS-MDW
COS-ORD
COS-STL
COS-PIA
COS-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 Colorado Springs to Illinois
COS-USIL
COS-MDW
COS-ORD
COS-STL
COS-PIA
What is the cheapest month to book a flight from Colorado Springs to Illinois?
Currently, January is the cheapest month in which you can book a flight from Colorado Springs to Illinois (average of $286). Flying from Colorado Springs to Illinois in December is currently the most expensive (average of $457). 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 COS to IL?
Find hourly flight availability from Colorado Springs 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 September 14, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado Springs to Illinois as you normally would.
Weekly flight availability from Colorado Springs to Illinois
Explore weekly flight availability from Colorado Springs 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 September 14, 2026.
The most flights from COS to USIL are scheduled on a Saturday (7 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Colorado Springs to Illinois?
Airfare is below average for this route at the moment.
Colorado Springs to Illinois flights typically cost between $301 and $468 in November.The cheapest round-trip price found within the last 5 days was $293 on American Airlines (Nov 7-Nov 10).
How far ahead should I book a flight from Colorado Springs to Illinois?
The price you pay for your flight from Colorado Springs to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 September 14, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican Airlines from Colorado Springs to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Colorado Springs 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 Colorado Springs to Illinois
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Complete your trip
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Search flights from Colorado Springs to Illinois by cabin class
Find flights from Colorado Springs to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Colorado Springs and Illinois flights
Browse other Colorado Springs and Illinois flight options. Last updated on September 14, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Colorado Springs to Illinois flights
Consider these flights traveling from Colorado Springs to Illinois.
Top 3 airlines flying from Colorado Springs to Illinois
Discover the top 3 airlines that operate flights from Colorado Springs 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 7,457,451 searches. Data last updated September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$229 | Average$479 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$239 | Average$417 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$240 | Average$384 | FlexibilityNo cancel fee | On-time63% |