Cheap flights from Washington, D.C. Dulles Intl Airport to Puerto Rico from $115

If you don’t want to visit Puerto Rico in January, then you should wait until June to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of $86.

On average, the least expensive day to fly to Puerto Rico from Washington, D.C. Dulles Intl Airport is on a Sunday. momondo users have found tickets for Sunday departures for as low as $361. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Puerto Rico is Wednesday, with ticket prices averaging around $488.

Our most recent data shows that the best time of day to fly to Puerto Rico is in the evening. Flights from Washington, D.C. Dulles Intl Airport to Puerto Rico during this time can be as low as $344. In contrast, the most expensive time of day to depart to Puerto Rico is in the afternoon when prices are around $455.

Fly from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl for the best Washington, D.C. Dulles Intl - Puerto Rico flight prices

You are more likely to see cheaper flights to Puerto Rico from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Puerto Rico for around $394 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Puerto Rico from Washington, D.C. Dulles Intl Airport for as low as $335 on momondo.

Frontier, United Airlines, and Delta are the most popular carriers operating from Washington, D.C. Dulles Intl to Puerto Rico

United Airlines, Frontier and Delta are the top three most popular airlines that fly to Puerto Rico from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Puerto Rico. Keep in mind that there are 6 different airlines that fly to Puerto Rico on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between Washington, D.C. and Puerto Rico have experienced a delay on any given week. The average delay length over the past 12 months has been 126 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.

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

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

As of May 2026, 5 flights take off from Washington, D.C. Dulles Intl Airport and land in Puerto Rico each day. The most common flight departure time for this route is 5:00PM, with 60% of daily flights taking off in the afternoon.

As of May 2026, 35 flights take off from Washington, D.C. Dulles Intl Airport and land in Puerto Rico each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.