Calgary to Denver flight time

It takes about 2 hours 33 minutes to fly from Calgary to Denver.

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Calgary to Denver is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

The cheapest months to fly from Calgary to Denver is September, when demand for travel is lower.

After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Calgary to Denver on December 19, 2025 with United Airlines, with prices starting at PKR 51,977.

The time difference between Denver and Calgary is 0h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.