How to find the cheapest flight from
Colorado Springs (COS) to Illinois
How far in advance should I book a flight from Colorado Springs to Illinois?
To save on the cost of your flight from Colorado Springs to Illinois, book at least 37 days before your planned departure. Booking around this time can save you about 10% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $177 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $177.
One-way flights to Illinois from Colorado Springs
The cheapest one-way flights from Colorado Springs to Illinois
8:00 am - 7:26 pm
12:05 pm - 6:30 am
2:51 pm - 4:49 am
Related info for your journey
Useful info, stats and facts about Colorado Springs to Illinois flights.
Arrival points for flights from Colorado Springs to Illinois
Destination information for Illinois
Things to know before you go. Useful info for your trip from Colorado Springs to Illinois