Cheap flights from Chicago O'Hare Intl Airport to Denver from $89

The cheapest month to fly to Denver from Chicago O'Hare Intl Airport is in September. 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 September, then you should wait until October to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $201.

The cheapest day to depart on your flight to Denver is on a Saturday when prices can be found for as low as $240. 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 $293.

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $241. Flights at noon are often more expensive with an average ticket price of $275.

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

You are more likely to see cheaper flights to Denver from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $230 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Chicago O'Hare Intl Airport for as low as $192 on momondo.

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

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

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Denver from Chicago O'Hare Intl Airport according to our data. United Airlines is the first choice among our users, with 35% 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 152 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, United Airlines have had the least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

The number of flights available between Chicago O'Hare Intl Airport and Denver is 47 per day as of April 2026. The most frequent departure time is 8:00PM, with 39% of daily flights leaving in the evening.

As of April 2026, 330 flights take off from Chicago O'Hare Intl Airport and land in Denver each week. The most common flight departure day for this route is Thu, with 19% of weekly flights taking off on this day.