In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

Consider American Airlines, JetBlue or Delta when booking your flight. These represent the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport.

What is the cheapest day to fly round-trip from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to San Juan Luis Munoz Marin Intl Airport. Check prices with Cheapflights to find a great deal for your trip.

Can I find deals for flights from Dulles Intl to Luis Munoz Marin Intl that include hotel bookings?

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

How can I find direct flights from Dulles Intl to Luis Munoz Marin Intl?

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

Can I find deals for business class flights from Dulles Intl to Luis Munoz Marin Intl?

Yes. Cheapflights offers flight deals from Dulles Intl to Luis Munoz Marin 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.

$89+ Flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl are usually found in June or October, booked 48 days in advance, depart on a Tuesday or Sunday and return on a Thursday

Cheap flight deals from Dulles Intl to Luis Munoz Marin Intl

Round-trip from	$186 (United Airlines)
One-way from	$89 (United Airlines)
Popular in	December
Cheapest in	June
Average price	$427
Good round-trip deal	$223 or less
Good one-way deal	$135 or less

From Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl

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One-way flight from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl

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Highest demand for flights based on searches. 8% potential increase in price ($44 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl.

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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl.

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Find flight deals from Dulles Intl to Luis Munoz Marin Intl

Cheapest flights from Dulles Intl to Luis Munoz Marin Intl
Explore the most affordable flight options available from Dulles Intl to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Thu 11/1310:09 amIAD - SJU

Nonstop3h 52mFrontier

Sun 11/166:25 amSJU - IAD

Nonstop3h 56mFrontier

Deal found 7/19

$175

Wed 10/18:39 amIAD - SJU

Nonstop3h 55mUnited Airlines

Mon 10/64:55 pmSJU - IAD

Nonstop3h 57mUnited Airlines

Deal found 7/20

$186

Tue 10/218:09 amIAD - SJU

1 stop14h 01mAmerican Airlines

Wed 10/294:45 pmSJU - IAD

1 stop17h 10mAmerican Airlines

Deal found 7/20

$195

Mon 12/87:00 amIAD - SJU

1 stop9h 15mDelta

Sat 12/137:00 amSJU - IAD

1 stop10h 31mDelta

Deal found 7/21

$215

Best flights from Dulles Intl to Luis Munoz Marin Intl
Discover carefully curated flight deals from Dulles Intl to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 21, 2025.

Wed 10/18:39 amIAD - SJU

Nonstop3h 55mUnited Airlines

Mon 10/64:55 pmSJU - IAD

Nonstop3h 57mUnited Airlines

Deal found 7/20

$186

Tue 7/2912:51 pmIAD - SJU

Nonstop3h 57mFrontier

Thu 7/317:33 amSJU - IAD

Nonstop3h 56mFrontier

Deal found 7/20

$188

Tue 10/78:09 amIAD - SJU

1 stop14h 02mAmerican Airlines

Tue 10/144:45 pmSJU - IAD

1 stop17h 10mAmerican Airlines

Deal found 7/19

$195

Sun 9/2812:08 pmIAD - SJU

1 stop11h 39mDelta

Tue 10/77:30 amSJU - IAD

1 stop9h 06mDelta

Deal found 7/20

$215

Last-minute flights from Dulles Intl to Luis Munoz Marin Intl
Discover last-minute flight deals from Dulles Intl to Luis Munoz Marin Intl. Data last updated July 21, 2025 and is based on user searches.

Sat 7/263:39 pmIAD - SJU

1 stop8h 15mUnited Airlines

Thu 7/314:55 pmSJU - IAD

Nonstop3h 59mUnited Airlines

Deal found 7/19

$221

Sat 7/266:35 amIAD - SJU

1 stop16h 20mAmerican Airlines

Sat 8/26:15 amSJU - IAD

1 stop16h 31mAmerican Airlines

Deal found 7/21

$305

Tue 7/2912:51 pmIAD - SJU

Nonstop3h 57mFrontier

Thu 7/317:33 amSJU - IAD

Nonstop3h 56mFrontier

Deal found 7/20

$188

One-way flights from Dulles Intl to Luis Munoz Marin Intl
Search for one-way flight options from Dulles Intl to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated July 21, 2025.

Wed 10/158:39 amIAD - SJU

Nonstop3h 55mUnited Airlines

Deal found 7/21

$89

Sun 8/1712:31 pmIAD - SJU

Nonstop3h 57mFrontier

Deal found 7/19

$94

Mon 9/16:00 amIAD - SJU

1 stop7h 10mDelta

Deal found 7/21

$108

Wed 10/88:09 amIAD - SJU

1 stop14h 01mAmerican Airlines

Deal found 7/21

$121

Fri 8/298:54 pmIAD - SJU

1 stop13h 52mAvelo Airlines

Deal found 7/19

$123

Fri 9/54:43 pmIAD - SJU

3 stops21h 28mMultiple Airlines

Deal found 7/19

$146

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 10/1

8:39 am-12:34 pm

Nonstop3h 55m

San Juan Luis Munoz Marin Intl

Mon 10/6

4:55 pm-8:52 pm

Nonstop3h 57m

$186

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Tue 7/29

12:51 pm-4:48 pm

Nonstop3h 57m

San Juan Luis Munoz Marin Intl

Thu 7/31

7:33 am-11:29 am

Nonstop3h 56m

$188

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Tue 10/7

8:09 am-10:11 pm

1 stop14h 02m

San Juan Luis Munoz Marin Intl

Tue 10/14

4:45 pm-9:55 am

1 stop17h 10m

$195

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 9/28

12:08 pm-11:47 pm

1 stop11h 39m

San Juan Luis Munoz Marin Intl

Tue 10/7

7:30 am-4:36 pm

1 stop9h 06m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 10/15

8:39 am-12:34 pm

Nonstop3h 55m

$89

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 8/17

12:31 pm-4:28 pm

Nonstop3h 57m

$94

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 9/1

6:00 am-1:10 pm

1 stop7h 10m

$108

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 10/8

8:09 am-10:10 pm

1 stop14h 01m

$121

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Fri 8/29

8:54 pm-10:46 am

1 stop13h 52m

$123

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Fri 9/5

4:43 pm-2:11 pm

3 stops21h 28m

$146

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

The best insider tips for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport trip

Airports

IAD

Expect long security queues at IAD, especially in the afternoon. Plan extra time for check-in and security to avoid stress.

SJU

For a quick ride from SJU to San Juan, use Uber. It's convenient and avoids the need for cash.

Our travel experts

Ramsey Qubein

Expert on IAD

Brandon Schultz

Expert on SJU

Best time to book a flight from Dulles Intl to Luis Munoz Marin Intl

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

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.

Cheapflights Insights

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

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

The best time to book flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport is 48 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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 IAD to SJU?

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport at noon. Doing so could potentially save you 66% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most flights from IAD to SJU are scheduled on a Sunday (6 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 Luis Munoz Marin Intl

See what other customers who have flown with Delta, Avelo Airlines, and United Airlines from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,962 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Avelo Airlines

7.5

Good

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,868 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,244 reviews

Delta

8.0

Very good

7,962 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport round-trip?
Currently priced at $186, United Airlines will fly you from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and American Airlines - these airlines can fly you to your destination from $188 and $195, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport for 58% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport one-way?
To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $89. Frontier flights start at $94 while deals on Delta start at $108 one-way.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport are Air Canada (76%), United Airlines (76%) and Brussels Airlines (63%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
The cheapest flight price from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport is $99. On average you can expect to pay $544. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $146.
Can I find deals for flights from Dulles Intl to Luis Munoz Marin Intl that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Luis Munoz Marin Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Luis Munoz Marin Intl.
Can I find deals for business class flights from Dulles Intl to Luis Munoz Marin Intl?
Yes. Cheapflights offers flight deals from Dulles Intl to Luis Munoz Marin 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 Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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.

See more FAQs

Dorado

Fajardo

Luquillo

Rio Grande

Humacao

Bayamón

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Dulles Intl to Luis Munoz Marin Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$109	Average$239	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$135	Average$288	FlexibilityNo cancel fee	On-time65%
JetBlue	Cheapest$203	Average$385	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$224	Average$506	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$234	Average$385	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$291	Average$514	FlexibilityNo cancel fee	On-time69%

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$89+ Cheap flights from Dulles Intl (IAD) to Luis Munoz Marin Intl (SJU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Luis Munoz Marin Intl with Cheapflights

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl are usually found in June or October, booked 48 days in advance, depart on a Tuesday or Sunday and return on a Thursday

Cheap flight deals from Dulles Intl to Luis Munoz Marin Intl

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One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Dulles Intl to Luis Munoz Marin Intl

Cheapest flights from Dulles Intl to Luis Munoz Marin IntlExplore the most affordable flight options available from Dulles Intl to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Explore the most affordable flight options available from Dulles Intl to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport that are best for you.

The best insider tips for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport trip

Airports

IAD

SJU

Our travel experts

Best time to book a flight from Dulles Intl to Luis Munoz Marin Intl

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Luis Munoz Marin Intl. Price data was last updated on July 18, 2025.

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

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

Find hourly flight availability from Dulles Intl to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 21, 2025.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Luis Munoz Marin Intl. Price data was last updated on July 20, 2025.

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

Reviews of airlines servicing Luis Munoz Marin Intl

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Luis Munoz Marin Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

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

Can I find deals for flights from Dulles Intl to Luis Munoz Marin Intl that include hotel bookings?

How can I find direct flights from Dulles Intl to Luis Munoz Marin Intl?

Can I find deals for business class flights from Dulles Intl to Luis Munoz Marin Intl?

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

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

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Alternative routes for Dulles Intl to Luis Munoz Marin Intl

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Top 6 airlines flying from Dulles Intl to Luis Munoz Marin Intl

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Cheapest flights from Dulles Intl to Luis Munoz Marin Intl
Explore the most affordable flight options available from Dulles Intl to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2025.