Cheap flights from Washington, D.C. Dulles Intl Airport to San Juan from $142

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $358.

On average, the least expensive day to fly to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport is on a Sunday. momondo users have found tickets for Sunday departures for as low as $420. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Washington, D.C. Dulles Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $477.

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is in the evening when flights can be purchased for as low as $331. Flights in the afternoon are often more expensive with an average ticket price of $478.

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

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $434 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport for as low as $369 on momondo.

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport.

As of September 2026, prices for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 28% cheaper when compared to flights at the same time last year.

United Airlines and Delta are the most popular carriers operating from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl

United Airlines, Frontier and American Airlines are the top three most popular airlines that fly to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 64% of people opting to fly with this airline when traveling to San Juan Luis Munoz Marin Intl Airport. Keep in mind that there are 5 different airlines that fly to San Juan Luis Munoz Marin Intl Airport 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 San Juan have experienced a delay on any given week. The average delay length over the past 12 months has been 127 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. Tuesday 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 19% of their flights experiencing any sort of delay.

Orlando (MCO) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Flights via Houston (IAH) offer the lowest average round-trip price of $343.

Flights connecting via Charlotte (CLT) have the shortest average one-way travel time: 5h 57m.

Charlotte (CLT) has the shortest average layover time for this route: 1h 06m.

As of September 2026, 1 flights take off from Washington, D.C. Dulles Intl Airport and land in San Juan Luis Munoz Marin Intl Airport each day. The most common flight departure time for this route is 8:00AM, with 100% of daily flights taking off at noon.

As of September 2026, there are 12 flights per week flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport. The most common day of the week flights depart is Fri, with 33% of flights taking off on this day.