Cheap flights from Calgary to Denver from C$ 178

In general, July is the cheapest month to fly from Calgary to Denver. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 245. If you aren’t able to travel during the month of July, then book flights to Denver from Calgary during August instead. Flights to Denver in August, while not as cheap as those in July, still average around C$ 259.

The cheapest day to depart from Calgary to Denver is on a Friday. Travellers who choose to depart for Denver on a Friday will often find tickets for as low as C$ 671. On the other hand, Monday is the most expensive day to depart from Calgary because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 770.

Our most recent data shows that the best time of day to fly to Denver is in the afternoon. Flights from Calgary to Denver during this time can be as low as C$ 512. Try not to purchase tickets at noon because they tend to be around C$ 726. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Calgary to Denver Intl for the best Calgary - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from Calgary when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around C$ 371 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Calgary for as low as C$ 209 on momondo.

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

You could potentially save up to 6% on your flight if you consider stops on a Calgary to Denver flight.

As of April 2026, prices for Calgary to Denver flights are approximately 4% cheaper when compared to flights at the same time last year.

United Airlines and Delta are the most popular carriers operating from Calgary to Denver Intl

WestJet, United Airlines and Air Canada are the top three most popular airlines that fly to Denver from Calgary according to our data. WestJet is the first choice among our users, with 41% of people opting to fly with this airline when travelling to Denver. Keep in mind that there are 4 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

As of April 2026, there are 3 flights per day flying from Calgary to Denver. The most common time of day flights depart is 2:00p.m., with 60% of flights taking off in the afternoon.

24 flights are operational weekly from Calgary to Denver as of April 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.