Cheap flights from Colorado to Washington, D.C. from $148

The month of February is, on average, the cheapest month to fly to Washington, D.C. from Colorado, with most prices found around $253. If you’re not able to fly to Washington, D.C. in February, then January is your next best option. Flight prices from Colorado to Washington, D.C. during January average around $273.

On average, the least expensive day to fly to Washington, D.C. from Colorado is on a Thursday. momondo users have found tickets for Thursday departures for as low as $397. 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 Colorado to Washington, D.C. for around $616.

In the morning is the cheapest time of day to fly from Colorado to Washington, D.C. when you can find flight prices for as low as $442. 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 $871. 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 Colorado - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $462 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 Colorado for as low as $357 on momondo.

There are 4 cabin classes available to choose from on Colorado 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.

United Airlines, Delta, and Southwest are the most popular carriers operating from Colorado to Washington, D.C.

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Washington, D.C. from Colorado according to our data. United Airlines is the first choice among our users, with 44% 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.

21 flights are operational daily from Colorado to Washington, D.C. as of November 2026. The most popular departure time for this route is 7:00AM, with 45% of flights per day taking off at noon.

As of November 2026, there are 149 flights per week flying from Colorado to Washington, D.C.. The most common day of the week flights depart is Wed, with 18% of flights taking off on this day.