$130+ 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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Nov 25 — Dec 21
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 October 26, 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 October 26, 2026.
This American Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:34 pm -
Nonstop2h 55m
Thu 11/1211:00 am -
Nonstop3h 04m
Deal found 10/21![American Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 stop8h 14m
Wed 12/166:00 am -
1 stop7h 33m
Deal found 10/22![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 12/31:40 pm -
1 stop6h 13m
Wed 12/92:04 pm -
1 stop9h 20m
Deal found 10/21![Delta logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/611:34 am -
1 stop21h 58m
Wed 12/97:25 am -
2 stops28h 19m
Deal found 10/21![Multiple Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 12/71:40 pm -
1 stop8h 30m
Wed 12/95:05 pm -
1 stop5h 40m
Deal found 10/22![Southwest logo]()
$282
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/91:31 pm -
1 stop8h 23m
Thu 11/121:31 pm -
2 stops9h 51m
Deal found 10/21![Delta logo]()
$284
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/96:08 pm -
2 stops14h 14m
Thu 11/126:49 am -
1 stop6h 37m
Deal found 10/21![Delta logo]()
$284
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 12/184:35 pm -
1 stop6h 15m
Sun 12/205:20 am -
1 stop5h 45m
Deal found 10/22![Southwest logo]()
$285
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/1710:15 am -
2 stops10h 45m
Sun 11/225:55 am -
1 stop4h 30m
Deal found 10/22![Southwest logo]()
$287
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 12/64:40 pm -
2 stops7h 30m
Wed 12/91:20 pm -
2 stops9h 25m
Deal found 10/22![Southwest logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/611:34 am -
1 stop21h 58m
Thu 12/1010:37 pm -
2 stops19h 43m
Deal found 10/21![Multiple Airlines logo]()
$293
This American Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:34 pm -
Nonstop2h 55m
Mon 11/235:00 am -
1 stop8h 06m
Deal found 10/23![American Airlines logo]()
$294
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 October 26, 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 October 26, 2026.
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/91:31 pm -
1 stop8h 23m
Thu 11/126:00 am -
1 stop7h 26m
Deal found 10/21![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 12/115:45 am -
Nonstop2h 51m
Mon 12/1412:59 pm -
1 stop4h 25m
Deal found 10/24![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 11/217:05 pm -
1 stop4h 25m
Wed 11/256:30 pm -
1 stop4h 50m
Deal found 10/24![Southwest logo]()
$385
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 12/91:40 pm -
1 stop8h 14m
Sat 12/1212:39 pm -
2 stops10h 45m
Deal found 10/22![Delta logo]()
$284
This American Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 12/181:27 pm -
2 stops9h 48m
Sun 1/34:50 pm -
1 stop7h 50m
Deal found 10/24![American Airlines logo]()
$632
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 2/231:40 pm -
1 stop7h 40m
Sat 2/277:00 am -
2 stops11h 14m
Deal found 10/22![Delta logo]()
$314
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 12/1111:43 am -
Nonstop2h 46m
Sun 12/137:00 am -
1 stop6h 37m
Deal found 10/21![United Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” 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 11/166:08 pm -
2 stops14h 14m
Mon 11/232:44 pm -
2 stops8h 38m
Deal found 10/23![Delta logo]()
$314
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/186:31 pm -
1 stop4h 59m
Mon 12/217:50 pm -
Nonstop3h 09m
Deal found 10/25![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/91:31 pm -
1 stop8h 23m
Fri 11/131:05 pm -
1 stop8h 45m
Deal found 10/21![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 3/247:15 pm -
1 stop9h 25m
Sat 3/2710:05 am -
2 stops11h 00m
Deal found 10/25![Southwest logo]()
$436
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 2/211:26 am -
1 stop6h 24m
Wed 2/37:45 pm -
Nonstop3h 14m
Deal found 10/21![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/101:31 pm -
1 stop8h 23m
Fri 11/131:31 pm -
2 stops9h 51m
Deal found 10/21![Delta logo]()
$322
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/1810:40 am -
Nonstop2h 25m
Mon 12/2111:05 am -
Nonstop2h 30m
Deal found 10/25![Southwest logo]()
$443
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/225:25 am -
2 stops8h 05m
Wed 12/305:00 pm -
2 stops6h 20m
Deal found 10/25![Southwest logo]()
$447
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/1012:02 pm -
Nonstop2h 51m
Wed 11/115:48 pm -
1 stop7h 11m
Deal found 10/22![United Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/191:31 pm -
1 stop8h 37m
Thu 11/266:00 am -
2 stops12h 28m
Deal found 10/25![Delta logo]()
$344
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 3/2412:16 pm -
Nonstop2h 42m
Sat 3/277:15 am -
1 stop4h 26m
Deal found 10/25![United Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 12/118:02 am -
2 stops11h 13m
Sun 12/132:04 pm -
1 stop9h 20m
Deal found 10/21![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 1/91:30 pm -
1 stop6h 40m
Tue 1/128:40 am -
1 stop6h 55m
Deal found 10/25![United Airlines logo]()
$439
This deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/73:10 pm -
1 stop5h 00m
Sat 1/95:41 pm -
1 stop5h 18m
Deal found 10/21![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 stops11h 13m
Tue 11/101:30 pm -
1 stop8h 20m
Deal found 10/21![Delta logo]()
$406
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 1/91:30 pm -
1 stop6h 29m
Tue 1/123:46 pm -
1 stop7h 13m
Deal found 10/21![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” 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 11/176:08 pm -
2 stops15h 11m
Sun 11/226:00 am -
1 stop7h 26m
Deal found 10/23![Delta logo]()
$409
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 -
2 stops9h 47m
Tue 11/101:31 pm -
2 stops8h 19m
Deal found 10/22![Delta logo]()
$422
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 12/131:40 pm -
1 stop8h 14m
Mon 12/146:00 am -
1 stop7h 33m
Deal found 10/22![Delta logo]()
$427
This Delta deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/221:31 pm -
1 stop8h 37m
Wed 12/26:10 am -
1 stop7h 23m
Deal found 10/25![Delta logo]()
$432
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 3/1812:16 pm -
1 stop18h 59m
Sun 3/216:55 pm -
1 stop28h 03m
Deal found 10/24![United Airlines logo]()
$668
Last-minute flights from Colorado Springs to IllinoisDiscover last-minute flight deals from Colorado Springs to Illinois. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado Springs to Illinois. Data last updated October 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:34 pm -
Nonstop2h 55m
Thu 11/1211:00 am -
Nonstop3h 04m
Deal found 10/21![American Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/91:31 pm -
1 stop8h 23m
Thu 11/126:00 am -
1 stop7h 26m
Deal found 10/21![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/97:45 pm -
1 stop9h 00m
Fri 11/135:20 am -
1 stop6h 05m
Deal found 10/22![Southwest logo]()
$282
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/96:08 pm -
2 stops14h 14m
Thu 11/126:49 am -
1 stop6h 37m
Deal found 10/21![Delta logo]()
$284
This American Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:34 pm -
Nonstop2h 55m
Fri 11/1311:00 am -
Nonstop3h 04m
Deal found 10/21![American Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 11/91:31 pm -
1 stop8h 23m
Fri 11/131:05 pm -
1 stop8h 45m
Deal found 10/21![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/91:31 pm -
1 stop6h 18m
Fri 11/132:03 pm -
1 stop9h 19m
Deal found 10/22![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/125:05 pm -
1 stop4h 41m
Thu 11/2610:55 am -
1 stop4h 25m
Deal found 10/22![United Airlines logo]()
$279
This American Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:34 pm -
Nonstop2h 55m
Mon 11/235:00 am -
1 stop8h 06m
Deal found 10/23![American Airlines logo]()
$294
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” 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 11/166:08 pm -
2 stops14h 14m
Mon 11/232:44 pm -
2 stops8h 38m
Deal found 10/23![Delta logo]()
$314
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/1710:15 am -
2 stops10h 45m
Sun 11/225:55 am -
1 stop4h 30m
Deal found 10/22![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/178:09 am -
Nonstop2h 47m
Sun 11/227:50 pm -
Nonstop3h 07m
Deal found 10/22![United Airlines logo]()
$316
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 October 26, 2026.
Search for one-way flight options from Colorado Springs to Illinois. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This American Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 12/81:39 pm -
Nonstop2h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![American Airlines logo]()
$130
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 stop8h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Delta logo]()
$140
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 12/15:35 pm -
1 stop11h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Southwest logo]()
$142
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/165:35 pm -
1 stop11h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Southwest logo]()
$145
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/106:08 pm -
2 stops14h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Delta logo]()
$145
This American Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:34 pm -
Nonstop2h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![American Airlines logo]()
$168
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 2/86:25 am -
2 stops7h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Southwest logo]()
$170
This American Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” 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 11/2412:56 pm -
1 stop8h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![American Airlines logo]()
$178
This Delta deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” 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 12/118:02 am -
2 stops11h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$183
This deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/1310:40 am -
1 stop5h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” 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 11/164:24 pm -
2 stops24h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$200
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” 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 11/246:00 am -
2 stops9h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Delta logo]()
$202
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 October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $259 (American Airlines) |
One-way from | $130 (American Airlines) |
Popular in | July |
Cheapest in | August |
Average price | $385 |
Good round-trip deal | $387 or less |
Good one-way deal | $249 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 October 26, 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
Quickest round-trip
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Wed 12/16
11:43 am-3:30 pm
Nonstop2h 47m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$130
Colorado SpringsChicago
COS Colorado Springs - MDW Chicago Midway
COSMDW
Colorado Springs
Sat 11/21
8:05 pm-5:45 am
1 stop8h 40m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
Colorado SpringsChicago
COS Colorado Springs - MDW Chicago Midway
COSMDW
Colorado Springs
Tue 12/8
1:40 pm-10:54 pm
1 stop8h 14m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Tue 12/8
12:59 pm-10:15 pm
1 stop8h 16m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Thu 11/19
1:31 pm-8:49 pm
1 stop6h 18m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Tue 12/1
6:20 pm-11:59 pm
1 stop4h 39m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Fri 12/11
5:45 am-9:36 am
Nonstop2h 51m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$168
Colorado SpringsChicago
COS Colorado Springs - MDW Chicago Midway
COSMDW
Colorado Springs
Mon 2/8
6:25 am-3:15 pm
2 stops7h 50m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$170
Colorado SpringsChicago
COS Colorado Springs - ORD Chicago O'Hare Intl
COSORD
Colorado Springs
Tue 11/24
12:56 pm-10:25 pm
1 stop8h 29m
Chicago O'Hare Intl
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
Fri 12/11
8:02 am-8:15 pm
2 stops11h 13m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$183
Showing 1-10 of 49 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-ORD
COS-MDW
COS-PIA
COS-MLI
COS-DEC
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-ORD
COS-MDW
COS-PIA
COS-MLI
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 June is currently the most expensive (average of $451). 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 October 26, 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 October 26, 2026.
The most flights from COS to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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 $334 and $504 in November.The cheapest round-trip price found within the last 5 days was $259 on American Airlines (Nov 9-Nov 12).
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 76 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 October 26, 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.
Food
7.0
Entertainment
7.4
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
7.9
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Entertainment
7.4
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
7.9
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Entertainment
7.4
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
7.9
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Food
7.0
Entertainment
7.4
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
7.9
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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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 October 26, 2026.
Popular flight searches
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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 October 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$229 | Average$355 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$243 | Average$424 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$243 | Average$424 | FlexibilityNo cancel fee | On-time63% |