Skyscanner

Flights from Denver to Illinois

Flight deals from Denver to Illinois

Looking for cheap tickets from Denver to Illinois, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.
Chicago.SAR 291 per passenger.Departing Fri, 5 Sep, returning Mon, 8 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Fri, 5 Sep, arriving in Chicago Midway.Inbound direct flight with Frontier Airlines departs from Chicago Midway on Mon, 8 Sep, arriving in Denver International.Price includes taxes and charges.From SAR 291, select.
Peoria.SAR 433 per passenger.Departing Fri, 5 Sep, returning Mon, 8 Sep.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Fri, 5 Sep, arriving in Greater Peoria.Inbound direct flight with Allegiant Air departs from Greater Peoria on Mon, 8 Sep, arriving in Denver International.Price includes taxes and charges.From SAR 433, select.
Moline.SAR 812 per passenger.Departing Thu, 2 Oct, returning Mon, 6 Oct.Return flight with United.Outbound indirect flight with United, departs from Denver International on Thu, 2 Oct, arriving in Moline.Inbound indirect flight with United, departs from Moline on Mon, 6 Oct, arriving in Denver International.Price includes taxes and charges.From SAR 812, select.
Marion.SAR 964 per passenger.Departing Thu, 11 Sep, returning Mon, 15 Sep.Return flight with Frontier Airlines and Contour Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 11 Sep, arriving in Marion.Inbound indirect flight with Contour Airlines, departs from Marion on Mon, 15 Sep, arriving in Denver International.Price includes taxes and charges.From SAR 964, select.
Bloomington.SAR 1,268 per passenger.Departing Thu, 2 Oct, returning Mon, 6 Oct.Return flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 2 Oct, arriving in Central Illinois Regional.Inbound indirect flight with Allegiant Air, departs from Central Illinois Regional on Mon, 6 Oct, arriving in Denver International.Price includes taxes and charges.From SAR 1,268, select.

Flying from Denver to Illinois

Arm yourself with these facts on the fly.
Cheapest flight foundSAR 291, Chicago
Cheapest month to flySeptember
Average flight time2 hrs, 19 mins
Cheapest airport to fly fromDenver International
Most popular airlineSouthwest Airlines

Frequently asked questions

We looked at all of the upcoming return flights from Denver to Illinois we could find over the next 12 months. It looks like SAR 291 is the best price. This is good, compared to the average Illinois ticket price of SAR 758.
The cheapest month to fly from Denver to Moline Airport is usually October. The cheapest month to fly from Denver to Chicago Midway Airport is usually September. The cheapest month to fly from Denver to Central Illinois Regional Airport is usually October. And the cheapest month to fly from Denver to Marion Airport is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Illinois on Friday, 5 September 2025.
Denver International Airport offers direct flights to Illinois.
If you're flying from Denver, the cheapest city in Illinois to fly into is Chicago. The cheapest airport serving Chicago at the moment is Chicago Midway.
The average flight time between Denver and Illinois is 2 hours and 19 minutes.