Cheap flights from Washington, D.C. Reagan-National Airport to Denver from $103

The cheapest month to fly to Denver from Washington, D.C. Reagan-National Airport is in January. Flight prices, which tend to average around $201, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until September to fly from Washington, D.C. Reagan-National Airport, when ticket prices are also cheap, with an average price of $223.

The cheapest day to depart on your flight to Denver is on a Saturday when prices can be found for as low as $316. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $400.

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $287. Flights in the evening are often more expensive with an average ticket price of $382.

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

You are more likely to see cheaper flights to Denver from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $278 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Washington, D.C. Reagan-National Airport for as low as $222 on momondo.

Frontier, Southwest, and Delta are the most popular carriers operating from Washington, D.C. Reagan-National to Denver Intl

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Denver from Washington, D.C. Reagan-National Airport according to our data. Frontier is the first choice among our users, with 85% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 6 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% of flights between Washington, D.C. and Denver have experienced a delay on any given week. The average delay length over the past 12 months has been 177 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Frontier have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

As of May 2026, there are 6 flights per day flying from Washington, D.C. Reagan-National Airport to Denver. The most common time of day flights depart is 4:00PM, with 56% of flights taking off in the afternoon.

The number of flights available between Washington, D.C. Reagan-National Airport and Denver is 44 per week as of May 2026. The most frequent departure day is Fri, with 25% of weekly flights leaving on this day.