What are the cheapest airlines flying from San Juan to Washington, D.C. Dulles Intl Airport round-trip?

Currently priced at $75, Frontier will fly you from San Juan to Washington, D.C. Dulles Intl Airport and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $245. Frontier is 79% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from San Juan to Washington, D.C. Dulles Intl Airport one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $59. United Airlines flights start at $145 while deals on Delta start at $158 one-way.

Weekly flight availability from San Juan to Washington, D.C. Dulles Intl Airport

The most flights from PR1 to IAD are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the cheapest flights from San Juan to Washington, D.C. Dulles Intl Airport?

Looking at all options, your cheapest flight can be booked for $130. While the most popular route (San Juan Luis Munoz Marin Intl - Washington, D.C. Dulles Intl) can be booked for $245 on average, our data indicates $650 when flying from San Juan to Washington, D.C. Dulles Intl Airport.

Can I find deals for flights from San Juan to Dulles Intl that include hotel bookings?

Yes. In addition to deals on San Juan to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from San Juan to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Juan to Dulles Intl.

Can I find deals for business class flights from San Juan to Dulles Intl?

Yes. Cheapflights offers flight deals from San Juan to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Find Cheap Flights from San Juan to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from San Juan to Washington, D.C. Dulles Intl are usually found in January or February, booked 10 days in advance, depart on a Thursday or Wednesday and return on a Monday

Find flight deals from San Juan to Dulles Intl

Popular in	June
Cheapest in	January
Average price	$357

Highest demand for flights based on searches. 21% potential increase in price ($100 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Best time to book a flight from San Juan to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from San Juan with our price prediction graph.

PR1-IAD

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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Everything you need to know about your flight from San Juan to Washington, D.C. Dulles Intl Airport

Prices

Airlines

How far ahead should I book a flight from San Juan to Washington, D.C. Dulles Intl Airport?

To ensure you get the cheapest price possible for a flight from San Juan to Washington, D.C. Dulles Intl Airport, you should look to book at least 9 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from San Juan to Washington, D.C. Dulles Intl Airport?

Currently, January is the cheapest month in which you can book a flight from San Juan to Washington, D.C. Dulles Intl Airport (average of $114). Flying from San Juan to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $539). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SJU to IAD?

When flying from San Juan to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from San Juan to Washington, D.C. Dulles Intl Airport, such as United Airlines and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,350 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

United Airlines

7.4

Good

10,350 reviews

United Airlines

7.4

Good

10,350 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Frontier

5.5

Fair

2,542 reviews

United Airlines

7.4

Good

10,350 reviews

Reviews

1 / 20

10.0

Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

What are the cheapest airlines flying from San Juan to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at $75, Frontier will fly you from San Juan to Washington, D.C. Dulles Intl Airport and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $245. Frontier is 79% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from San Juan to Washington, D.C. Dulles Intl Airport one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $59. United Airlines flights start at $145 while deals on Delta start at $158 one-way.
What are the cheapest flights from San Juan to Washington, D.C. Dulles Intl Airport?
Looking at all options, your cheapest flight can be booked for $130. While the most popular route (San Juan Luis Munoz Marin Intl - Washington, D.C. Dulles Intl) can be booked for $245 on average, our data indicates $650 when flying from San Juan to Washington, D.C. Dulles Intl Airport.
Can I find deals for flights from San Juan to Dulles Intl that include hotel bookings?
Yes. In addition to deals on San Juan to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Juan to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Juan to Dulles Intl.
Can I find deals for business class flights from San Juan to Dulles Intl?
Yes. Cheapflights offers flight deals from San Juan to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from San Juan to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from San Juan to Washington, D.C. Dulles Intl Airport (average of $114). Flying from San Juan to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $539). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Luis Munoz Marin Intl to Baltimore flights

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Top 2 airlines flying from San Juan to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$75	Average$171	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$245	Average$416	FlexibilityNo cancel fee	On-time69%

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Cheap flights from San Juan to Dulles Intl (IAD)

Find cheap flights from San Juan to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from San Juan to Dulles Intl

Popular in

Cheapest in

Average price

Best time to book a flight from San Juan to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from San Juan with our price prediction graph.

Cheapflights Insights

How far ahead should I book a flight from San Juan to Washington, D.C. Dulles Intl Airport?

What is the cheapest month to book a flight from San Juan to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from SJU to IAD?

When flying from San Juan to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from San Juan to Washington, D.C. Dulles Intl Airport

The most flights from PR1 to IAD are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from San Juan to Washington, D.C. Dulles Intl Airport, such as United Airlines and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What are the cheapest airlines flying from San Juan to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from San Juan to Washington, D.C. Dulles Intl Airport one-way?

What are the cheapest flights from San Juan to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from San Juan to Dulles Intl that include hotel bookings?

How can I find direct flights from San Juan to Dulles Intl?

Can I find deals for business class flights from San Juan to Dulles Intl?

What is the cheapest month to book a flight from San Juan to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for San Juan to Dulles Intl

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Complete your trip

Complete your trip to Dulles Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Other flights to Dulles Intl

Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 12, 2026.

Search flights from San Juan to Dulles Intl by cabin class

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San Juan and Dulles Intl flights

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Top 2 airlines flying from San Juan to Dulles Intl

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