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Luis Munoz Marin Intl

$117+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJU
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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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 August, booked 90 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

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Luis Munoz Marin Intl (SJU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$168

One-way from

$117
(Frontier)

Popular in

April

Cheapest in

June

Average price

$471

Good round-trip deal

$297 or less

Good one-way deal

$173 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. 9% potential increase in price ($43 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 September 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 September 17, 2025.

This deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:26 pmIAD - SJU
Nonstop3h 52mFrontier
Fri 11/214:08 pmSJU - IAD
Nonstop4h 03mFrontier
Deal found 9/15$168
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/239:07 pmIAD - SJU
Nonstop3h 52mFrontier
Thu 10/307:30 amSJU - IAD
1 stop13h 27mFrontier
Deal found 9/17$176
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:26 pmIAD - SJU
Nonstop3h 52mFrontier
Sun 11/93:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$181
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/199:07 pmIAD - SJU
Nonstop3h 52mFrontier
Sun 11/23:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$183
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:26 pmIAD - SJU
Nonstop3h 52mFrontier
Thu 11/63:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$184
This Cheapflightsfares deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/269:07 pmIAD - SJU
Nonstop3h 52mFrontier
Sun 11/23:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/16$187
This CheapOair deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/239:07 pmIAD - SJU
Nonstop3h 52mFrontier
Sun 10/264:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$189
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:07 pmIAD - SJU
Nonstop3h 52mFrontier
Sun 10/194:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/16$191
This Frontier deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:08 amIAD - SJU
Nonstop3h 54mFrontier
Wed 12/173:59 pmSJU - IAD
1 stop7h 20mFrontier
Deal found 9/16$192
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/56:10 amIAD - SJU
1 stop8h 01mFrontier
Thu 10/94:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$197
This Frontier deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/269:07 pmIAD - SJU
Nonstop3h 52mFrontier
Wed 10/295:51 pmSJU - IAD
2 stops22h 43mFrontier
Deal found 9/16$201

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Luis Munoz Marin Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
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

Dulles Intl

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 11/10

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Thu 11/13

5:50 pm-8:55 pm

Nonstop4h 05m

$266

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 10/29

5:32 pm-9:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Fri 10/31

4:50 pm-8:55 pm

Nonstop4h 05m

$296

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 11/1

5:32 pm-9:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Fri 11/7

8:10 am-5:30 pm

1 stop10h 20m

$301

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 12/8

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Mon 12/15

5:50 pm-8:55 pm

Nonstop4h 05m

$302

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 10/1

10:45 am-8:38 pm

1 stop9h 53m

San Juan Luis Munoz Marin Intl

Tue 10/7

3:56 pm-12:21 am

1 stop8h 25m

$312

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 12/15

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Mon 12/22

2:15 pm-9:15 pm

1 stop8h 00m

$337

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 12/13

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Sat 12/20

8:30 am-11:35 am

Nonstop4h 05m

$339

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 12/10

6:00 am-2:40 pm

1 stop7h 40m

San Juan Luis Munoz Marin Intl

Tue 12/16

8:10 am-5:30 pm

1 stop10h 20m

$341

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 10/25

6:01 am-3:42 pm

1 stop9h 41m

San Juan Luis Munoz Marin Intl

Tue 10/28

7:10 am-5:30 pm

1 stop10h 20m

$341

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 10/4

5:12 pm-11:57 pm

1 stop6h 45m

San Juan Luis Munoz Marin Intl

Sat 10/11

4:55 pm-8:52 pm

Nonstop3h 57m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 19 results
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The best insider tips for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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.

Read more about IADby Ramsey Qubein
SJU

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

Read more about SJUby Brandon Schultz
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Brandon Schultz

Brandon Schultz

Expert on SJU

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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?

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 September 12, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport is 90 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?

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 September 17, 2025.

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 59% 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?

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 September 14, 2025.

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 Thursday evenings 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.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Luis Munoz Marin Intl. Reviews last updated September 17, 2025.
See what other customers who have flown with Delta, United Airlines, and American 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
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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!
Spirit Airlines
6.3
Okay
8,023 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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
5.8
Fair
3,173 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

8.0

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

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport in 3h 50m. Fly via United Airlines to get the fastest option. The distance from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport is about 1573 mi. Most flights are nonstop.

  • 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 $115, Frontier will fly you from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Spirit Airlines and American Airlines - these airlines can fly you to your destination from $135 and $145, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport for 73% less than the average price by searching for these airlines.

  • 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 (75%), United Airlines (75%) and Brussels Airlines (70%).

  • 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 $77. On average you can expect to pay $625. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $148.

  • 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

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

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Dorado
Fajardo
Rio Grande
Luquillo
Humacao

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Alternative routes for Dulles Intl to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Luis Munoz Marin Intl flights
Reagan-National to Luis Munoz Marin Intl flights

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

Discover the top 6 airlines that operate flights from Dulles Intl to Luis Munoz Marin Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$115Average$251FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$135Average$288FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$145Average$484FlexibilityNo cancel feeOn-time71%
DeltaCheapest$164Average$368FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$168Average$390FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$277Average$514FlexibilityNo cancel feeOn-time69%

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