Cheap flights from Washington, D.C. Reagan-National Airport to San Juan from $138

If you’re not able to fly to San Juan in September, then May is your next best option. Flight prices from Washington, D.C. Reagan-National Airport to San Juan during May average around $113.

The cheapest day to depart from Washington, D.C. Reagan-National Airport to San Juan is on a Sunday when prices can be found for as low as $387. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $457.

The cheapest time of day to fly to San Juan is in the evening when flights can be purchased for as low as $344. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $465 on average. Flights to San Juan from Washington, D.C. Reagan-National Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to San Juan from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $415 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Washington, D.C. Reagan-National Airport for as low as $356 on momondo.

There are 2 cabin classes available to choose from on Washington, D.C. Reagan-National Airport to San Juan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest is the most popular carrier operating from Washington, D.C. Reagan-National to San Juan

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

Historically, on average around 18% of flights between Washington, D.C. and San Juan have experienced a delay on any given week. The average delay length over the past 12 months has been 151 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the morning 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. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, JetBlue have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

1 flights are operational daily from Washington, D.C. Reagan-National Airport to San Juan as of June 2026. The most popular departure time for this route is 8:00AM, with 100% of flights per day taking off at noon.

As of June 2026, 7 flights take off from Washington, D.C. Reagan-National Airport and land in San Juan each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.