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Dulles Intl

$117+ Cheap flights from San Juan to Dulles Intl (IAD)

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — IAD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from San Juan to Washington, D.C. Dulles Intl are usually found in July or March, booked 42 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from San Juan to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Dulles Intl (IAD). 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 11, 2025.

Round-trip from

$181
(Cheapflightsfares)

One-way from

$117
(United Airlines)

Popular in

April

Cheapest in

July

Average price

$395
From San Juan to Washington, D.C. Dulles Intl
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One-way flight from San Juan to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 3% potential increase in price ($14 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 September 2025
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Find flight deals from San Juan to Dulles Intl

Cheapest flights from San Juan to Dulles Intl
Explore the most affordable flight options available from San Juan to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 11/23:45 pmSJU - IAD
Nonstop3h 56mFrontier
Sun 11/97:26 pmIAD - SJU
Nonstop3h 52mFrontier
Deal found 9/11$181
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Sat 11/224:05 pmSJU - IAD
Nonstop4h 03mFrontier
Sat 11/297:53 pmIAD - SJU
Nonstop3h 47mFrontier
Deal found 9/10$197
This Frontier deal was found by Cheapflights users on 9/10. 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.
Tue 11/254:05 pmSJU - IAD
Nonstop4h 03mFrontier
Sat 11/297:53 pmIAD - SJU
Nonstop3h 47mFrontier
Deal found 9/10$200
This Frontier deal was found by Cheapflights users on 9/10. 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 10/94:26 pmSJU - IAD
Nonstop3h 56mFrontier
Mon 10/139:28 pmIAD - SJU
2 stops17h 56mFrontier
Deal found 9/10$201
This CheapOair deal was found by Cheapflights users on 9/11. 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.
Fri 11/214:08 pmSJU - IAD
Nonstop4h 03mFrontier
Fri 11/288:06 pmIAD - SJU
Nonstop3h 47mFrontier
Deal found 9/11$202
This Frontier deal was found by Cheapflights users on 9/11. 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 11/63:45 pmSJU - IAD
Nonstop3h 56mFrontier
Sun 11/93:51 pmIAD - SJU
1 stop8h 41mFrontier
Deal found 9/11$204
This Frontier deal was found by Cheapflights users on 9/10. 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 10/234:26 pmSJU - IAD
Nonstop3h 56mFrontier
Sat 10/259:38 pmIAD - SJU
1 stop12h 04mFrontier
Deal found 9/10$212
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Thu 11/133:45 pmSJU - IAD
Nonstop3h 56mFrontier
Sat 11/157:04 amIAD - SJU
1 stop7h 15mFrontier
Deal found 9/10$215
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Tue 11/254:05 pmSJU - IAD
Nonstop4h 03mFrontier
Sun 11/307:53 pmIAD - SJU
Nonstop3h 47mFrontier
Deal found 9/10$216
This SmartFares deal was found by Cheapflights users on 9/9. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:00 amSJU - IAD
Nonstop4h 13mFrontier
Sun 12/1410:08 amIAD - SJU
Nonstop3h 54mFrontier
Deal found 9/9$219
This Frontier deal was found by Cheapflights users on 9/11. 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.
Mon 11/39:30 amSJU - IAD
2 stops15h 41mFrontier
Sun 11/97:26 pmIAD - SJU
Nonstop3h 52mFrontier
Deal found 9/11$224

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Juan to Dulles 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 11, 2025.
Use the filters below to find and compare flights from San Juan to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

San Juan

Fly to

Dulles Intl

Route

Depart

Return

Price

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Sun 11/2

3:45 pm-6:41 pm

Nonstop3h 56m

Washington, D.C. Dulles Intl

Sun 11/9

7:26 pm-12:18 am

Nonstop3h 52m

$181

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 10/9

1:30 pm-10:28 pm

1 stop8h 58m

Washington, D.C. Dulles Intl

Mon 10/13

8:39 am-12:34 pm

Nonstop3h 55m

$242

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 10/2

1:30 pm-10:28 pm

1 stop8h 58m

Washington, D.C. Dulles Intl

Tue 10/7

6:30 am-2:44 pm

1 stop8h 14m

$243

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 10/23

4:26 pm-8:22 pm

Nonstop3h 56m

Washington, D.C. Dulles Intl

Mon 10/27

6:15 am-2:06 pm

1 stop7h 51m

$244

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Sun 10/5

8:00 am-9:24 pm

1 stop13h 24m

Washington, D.C. Dulles Intl

Sun 10/12

9:07 pm-12:59 am

Nonstop3h 52m

$248

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Fri 10/24

5:43 pm-12:12 am

1 stop6h 29m

Washington, D.C. Dulles Intl

Mon 10/27

6:00 am-4:33 pm

1 stop10h 33m

$281

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 10/23

7:15 am-4:57 pm

1 stop9h 42m

Washington, D.C. Dulles Intl

Mon 10/27

6:00 am-4:33 pm

1 stop10h 33m

$281

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Mon 11/17

9:30 am-2:56 pm

1 stop6h 26m

Washington, D.C. Dulles Intl

Sat 11/29

7:56 pm-12:43 am

Nonstop3h 47m

$292

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 12/25

7:00 am-4:22 pm

1 stop10h 22m

Washington, D.C. Dulles Intl

Thu 1/1

10:55 am-9:10 pm

1 stop9h 15m

$305

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 2/5

5:50 pm-8:55 pm

Nonstop4h 05m

$117

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 20 results
1
2

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.
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 San Juan to Washington, D.C. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from San Juan to Dulles Intl. Price data was last updated on August 29, 2025.

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 42 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, August is the cheapest month in which you can book a flight from San Juan to Washington, D.C. Dulles Intl Airport (average of $292). Flying from San Juan to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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?

Find hourly flight availability from San Juan to Dulles 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 11, 2025.

It’s optimal to fly from San Juan to Washington, D.C. Dulles Intl Airport at noon. By choosing this option you can save up to 34% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles 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 Dulles Intl. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from San Juan to Washington, D.C. Dulles Intl Airport, such as Delta, United Airlines, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Frontier
5.8
Fair
3,177 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Related info for your journey

Find useful and relevant information for your journey from San Juan to Dulles 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 San Juan to Washington, D.C. Dulles Intl Airport?

    Frontier and United Airlines can get you from San Juan to Washington, D.C. Dulles Intl Airport in just under 3h 56m. Your travel time can differ by up to 5h 02m. San Juan and Washington, D.C. Dulles Intl Airport are separated by a distance of 1573 mi. This flight may include one or multiple stops.

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

    Currently priced at $99, 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. Search Cheapflights for deals from United Airlines and Delta - these airlines can fly you to your destination from $246 and $269, respectively. Frontier is 74% cheaper than the average price of flights available within the next 90 days to this destination.

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

    No one likes to see their flight delayed. When booking a flight from San Juan to Washington, D.C. Dulles Intl Airport consider choosing Air Canada (81%), United Airlines (81%) or Frontier (81%) as they are the most reliable in getting you off to your destination on time.

  • 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 $107. While the most popular route (San Juan Luis Munoz Marin Intl - Washington, D.C. Dulles Intl) can be booked for $154 on average, our data indicates $487 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, August is the cheapest month in which you can book a flight from San Juan to Washington, D.C. Dulles Intl Airport (average of $292). Flying from San Juan to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Woodbridge
Alexandria
Arlington
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
Dundalk
National Harbor

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from San Juan to Dulles Intl

Discover the top 3 airlines that operate flights from San Juan to Dulles 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$247FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$246Average$457FlexibilityNo cancel feeOn-time69%
DeltaCheapest$269Average$431FlexibilityNo cancel feeOn-timeN/A

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