Cheap flights from Illinois to Denver
Travel > North America > United States > Illinois to Denver flights
Denver began as a series of Old West mining towns during the Pikes Peak Gold Rush in what was then the western part of the Kansas Territory. The first settlement on the site of modern-day Denver was founded on the banks of the South Platte River in the summer of 1858 by gold prospectors and was called Montana City. This settlement dwindled after only a year since the miners preferred some of the existing towns in the area - especially Auraria (which is still a Denver suburb today) and St.... (read more in our Denver History)
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Check our newest flight offers to Denver:
- $78
Frontier Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (MDW) Denver, CO (DEN) 01/12/2025 07:15 am Denver, CO (DEN) Chicago, IL (MDW) 01/21/2025 08:55 pm - $78 Frontier Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (ORD) Denver, CO (DEN) 01/12/2025 07:25 am Denver, CO (DEN) Chicago, IL (ORD) 01/21/2025 08:55 pm - $193
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (ORD) Denver, CO (DEN) 01/12/2025 01:40 pm Denver, CO (DEN) Chicago, IL (ORD) 01/21/2025 08:55 pm - $209 Multiple Airlines
cheapoair.com check priceFrom To Departure Time Chicago, IL (MDW) Denver, CO (DEN) 01/12/2025 07:15 am Denver, CO (DEN) Chicago, IL (MDW) 01/21/2025 04:55 pm
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