Cheap flights from Colorado to District of Columbia from $125

In general, February is the cheapest month to fly from Colorado to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $251. If you don’t want to visit District of Columbia in February, then you should wait until January to fly from Colorado, when ticket prices are also cheap, with an average price of $267.

The cheapest day to depart on your flight to District of Columbia is on a Thursday when prices can be found for as low as $374. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $588.

Flying to District of Columbia from Colorado in the morning is the least expensive time of day to depart. momondo users have found prices as low as $412 when looking at flights departing in the morning. Flights to District of Columbia are more costly in the evening, with an average ticket price of $798. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to District of Columbia from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $437 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from Colorado for as low as $357 on momondo.

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

Frontier, Southwest, and American Airlines are the most popular carriers operating from Colorado to District of Columbia

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to District of Columbia from Colorado 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 District of Columbia. Keep in mind that there are 6 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

As of September 2026, 24 flights take off from Colorado and land in District of Columbia each day. The most common flight departure time for this route is 8:00AM, with 51% of daily flights taking off at noon.

The number of flights available between Colorado and District of Columbia is 173 per week as of September 2026. The most frequent departure day is Thu, with 18% of weekly flights leaving on this day.