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Dulles Intl

$181+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — IAD
Aug 1 — Aug 81
Sat 8/1
Sat 8/8
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 January or February, booked 10 days in advance, depart on a Thursday or Saturday and return on a Sunday

Cheap 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 July 2, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Fri 8/146:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Sun 8/165:40 pm
IAD
-
SJU
1 stop22h 31m
Frontier
Deal found 7/1$305
This Kiwi.com deal was found by Cheapflights users on 6/29. 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.
Wed 7/296:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Wed 8/57:48 am
IAD
-
SJU
2 stops16h 53m
Frontier
Deal found 6/29$306
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Fri 8/146:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Mon 8/176:09 pm
IAD
-
SJU
1 stop22h 02m
Frontier
Deal found 7/1$307
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Sat 8/16:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Sun 8/168:33 pm
IAD
-
SJU
2 stops28h 08m
Frontier
Deal found 6/28$308
This American Airlines deal was found by Cheapflights users on 6/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:47 pm
SJU
-
IAD
1 stop7h 08m
American Airlines
Tue 8/257:57 am
IAD
-
SJU
1 stop6h 54m
American Airlines
Deal found 6/28$316
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Fri 7/316:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Fri 8/78:33 pm
IAD
-
SJU
2 stops28h 08m
Frontier
Deal found 6/30$319
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:25 am
SJU
-
IAD
1 stop16h 45m
American Airlines
Sun 7/266:33 am
IAD
-
SJU
1 stop16h 26m
American Airlines
Deal found 7/1$321
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Fri 7/246:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Sat 8/16:49 am
IAD
-
SJU
2 stops17h 52m
Frontier
Deal found 6/28$324
This Kiwi.com deal was found by Cheapflights users on 6/26. 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.
Tue 8/116:00 am
SJU
-
IAD
1 stop13h 38m
Frontier
Sun 8/168:33 pm
IAD
-
SJU
2 stops19h 38m
Frontier
Deal found 6/26$325
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:25 am
SJU
-
IAD
1 stop14h 40m
American Airlines
Mon 7/276:14 am
IAD
-
SJU
1 stop17h 36m
American Airlines
Deal found 7/1$326
This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Fri 8/216:35 am
SJU
-
IAD
1 stop13h 09m
Frontier
Mon 8/246:20 am
IAD
-
SJU
1 stop7h 56m
Frontier
Deal found 7/1$327

Find 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 July 2, 2026.

Round-trip from

$305
(Kiwi.com)

One-way from

$181
(American Airlines)

Popular in

March

Cheapest in

January

Average price

$371
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
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2026
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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 July 2, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 8/27

4:55 pm-8:47 pm

Nonstop3h 52m

Washington, D.C. Dulles Intl

Sun 8/30

9:00 am-12:54 pm

Nonstop3h 54m

$457

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 8/20

4:55 pm-8:47 pm

Nonstop3h 52m

Washington, D.C. Dulles Intl

Sun 8/23

9:00 am-12:54 pm

Nonstop3h 54m

$457

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Fri 8/21

4:55 pm-8:47 pm

Nonstop3h 52m

Washington, D.C. Dulles Intl

Tue 8/25

9:00 am-12:54 pm

Nonstop3h 54m

$457

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Wed 8/12

12:56 pm-8:05 pm

1 stop7h 09m

Washington, D.C. Dulles Intl

Mon 8/17

12:30 pm-10:29 pm

1 stop9h 59m

$460

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Wed 8/19

1:00 am-11:52 am

2 stops10h 52m

Washington, D.C. Dulles Intl

Mon 8/24

6:16 am-1:45 pm

1 stop7h 29m

$466

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Fri 7/10

7:20 am-11:21 am

Nonstop4h 01m

Washington, D.C. Dulles Intl

Thu 7/16

5:24 pm-9:24 pm

Nonstop4h 00m

$477

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Sat 8/1

1:00 am-7:22 am

1 stop6h 22m

Washington, D.C. Dulles Intl

Sun 8/2

5:24 pm-9:24 pm

Nonstop4h 00m

$479

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Tue 8/11

7:20 am-11:12 am

Nonstop3h 52m

Washington, D.C. Dulles Intl

Sun 8/16

9:00 am-12:54 pm

Nonstop3h 54m

$482

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 9/10

4:55 pm-8:47 pm

Nonstop3h 52m

Washington, D.C. Dulles Intl

Sat 9/12

6:15 am-1:45 pm

1 stop7h 30m

$486

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Fri 9/18

7:00 am-10:59 pm

2 stops15h 59m

Washington, D.C. Dulles Intl

Mon 9/21

12:49 pm-11:50 pm

2 stops11h 01m

$490

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 20 resultsSorted by cheapest first
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

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 $37). Flying from San Juan to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $279). 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 July 2, 2026.

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

Explore weekly flight availability from San Juan to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 2, 2026.

The most flights from PR1 to IAD are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip 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?

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.

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 July 2, 2026.
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
9,916 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
9,916 reviews
United Airlines
7.4
Good
9,916 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
5.6
Fair
2,851 reviews
United Airlines
7.4
Good
9,916 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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

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?

    United Airlines and Delta can get you from San Juan to Washington, D.C. Dulles Intl Airport in just under 3h 52m. Your travel time can differ by up to 3h 17m. 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 $76, 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 $234. Frontier is 77% 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 $138 while deals on Delta start at $146 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 $168. While the most popular route (San Juan Luis Munoz Marin Intl - Washington, D.C. Dulles Intl) can be booked for $352 on average, our data indicates $510 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 $37). Flying from San Juan to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $279). 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
Alexandria
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Falls Church
Fredericksburg
Hanover
Chantilly
Manassas
Silver Spring
Laurel
Clinton
Hunt Valley
Cordova

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Alternative routes for San Juan to Dulles Intl

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

Top 2 airlines flying from San Juan to Dulles Intl

Discover the top 2 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 July 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$76Average$160FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$234Average$416FlexibilityNo cancel feeOn-time69%

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