Cheap flights from Denver to Washington, D.C. from $45

The month of February is, on average, the cheapest month to fly to Washington, D.C. from Denver, with most prices found around $241. If you’re not able to fly to Washington, D.C. in February, then January is your next best option. Flight prices from Denver to Washington, D.C. during January average around $255.

On average, the least expensive day to fly to Washington, D.C. from Denver is on a Thursday. momondo users have found tickets for Thursday departures for as low as $392. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Denver to Washington, D.C. for around $609.

In the morning is the cheapest time of day to fly from Denver to Washington, D.C. when you can find flight prices for as low as $431. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $847. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Denver Intl to Washington, D.C. Reagan-National for the best Denver Intl - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $456 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Denver for as low as $357 on momondo.

There are 4 cabin classes available to choose from on Denver to Washington, D.C. 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 Denver to Washington, D.C..

As of October 2026, prices for Denver to Washington, D.C. flights are approximately 56% more expensive when compared to flights at the same time last year.

Frontier, Southwest, and United Airlines are the most popular carriers operating from Denver Intl to Washington, D.C.

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Washington, D.C. from Denver according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 6 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Atlanta (ATL) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

Flights via Atlanta (ATL) offer the lowest average round-trip price of $265.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 4h 59m.

Detroit (DTW) has the shortest average layover time for this route: 1h 28m.

As of October 2026, 30 flights take off from Denver and land in Washington, D.C. each day. The most common flight departure time for this route is 8:00AM, with 51% of daily flights taking off at noon.

215 flights are operational weekly from Denver to Washington, D.C. as of October 2026. The most popular departure day for this route is Tue, with 18% of flights per week taking off on this day.