Find United Airlines(UA) flights from Washington D.C. to Denver

At the moment, you can catch a nonstop flight from Washington D.C. to Denver with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes about 4 hours 25 minutes to fly from Washington D.C. 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 Washington D.C. 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.

Based on Trip.com data in the past 4 weeks, there is 93 flight per week flying from Washington D.C. to Denver. You can check the weekly schedule for popular airlines on this route below: Frontier Airlines: S/M/T/W/T/F/S -- F9685 (07:36)

The cheapest months to fly from Washington D.C. to Denver is November, when demand for travel is lower.

After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Washington D.C. to Denver on August 24, 2026 with Delta Air Lines, with prices starting at US$195.

You can land at any one of the following hubs in Denver, with Ronald Reagan Washington National Airport to Denver International Airport (DCA-DEN) is by far the most common option on this route: Rocky Mountain Metropolitan Airport (BJC) Denver International Airport (DEN).

The time difference between Denver and Washington D.C. is 2h.

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.