Cheap flights from Chicago to Denver from $85

The cheapest month to fly to Denver from Chicago is in October. Flight prices, which tend to average around $183, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in October, then you should wait until September to fly from Chicago, when ticket prices are also cheap, with an average price of $185.

The cheapest day to depart on your flight to Denver is on a Saturday when prices can be found for as low as $234. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $281.

The cheapest time of day to fly to Denver is in the morning when flights can be purchased for as low as $244. Flights at noon are often more expensive with an average ticket price of $270.

Fly from Chicago O'Hare Intl to Denver Intl for the best Chicago - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $225 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Chicago for as low as $187 on momondo.

There are 4 cabin classes available to choose from on Chicago to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Chicago to Denver.

As of March 2026, prices for Chicago to Denver flights are approximately 18% more expensive when compared to flights at the same time last year.

United Airlines and Southwest are the most popular carriers operating from Chicago to Denver Intl

United Airlines, Frontier and American Airlines are the top three most popular airlines that fly to Denver from Chicago according to our data. United Airlines is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 5 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between Chicago and Denver have experienced a delay on any given week. The average delay length over the past 12 months has been 143 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Frontier have had the least number of delays on this route over the last 12 months; with about 16% of their flights experiencing any sort of delay.

As of March 2026, 44 flights take off from Chicago and land in Denver each day. The most common flight departure time for this route is 2:00PM, with 37% of daily flights taking off in the afternoon.

As of March 2026, there are 309 flights per week flying from Chicago to Denver. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.