How to find the cheapest flight from
Illinois to Denver (DEN)
How far in advance should I book a flight from Illinois to Denver?
Travelers have found it’s best to book a flight 57 days in advance to save up to 12% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 57 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Illinois to Denver 1-2 weeks in advance for as low as $116, or $131 for flights within the next 24 hours.
One-way flights to Denver from Illinois
The cheapest one-way flights from Illinois to Denver
4:45 pm - 6:18 pm
3:19 am - 9:28 am
5:25 pm - 4:44 pm
Related info for your journey
Useful info, stats and facts about Illinois to Denver flights.
Arrival points for flights from Illinois to Denver
Destination information for Denver
Things to know before you go. Useful info for your trip from Illinois to Denver