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Dulles Intl

$108+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — IAD
May 2 — May 91
Sat 5/2
Sat 5/9
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 3 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 April 2, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/13:23 pm
SJU
-
IAD
1 stop9h 13m
Frontier
Sat 5/97:27 pm
IAD
-
SJU
1 stop6h 41m
Frontier
Deal found 3/31$174
This Orbitz deal was found by Cheapflights users on 3/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:03 pm
SJU
-
IAD
1 stop9h 33m
Frontier
Sat 4/258:12 am
IAD
-
SJU
1 stop14h 36m
Frontier
Deal found 3/30$176
This Frontier deal was found by Cheapflights users on 3/31. 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.
Fri 5/13:23 pm
SJU
-
IAD
1 stop9h 13m
Frontier
Sun 5/310:02 am
IAD
-
SJU
1 stop12h 54m
Frontier
Deal found 3/31$186
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Thu 4/233:03 pm
SJU
-
IAD
1 stop9h 33m
Frontier
Sat 5/28:12 am
IAD
-
SJU
1 stop14h 36m
Frontier
Deal found 3/30$192
This Frontier deal was found by Cheapflights users on 3/31. 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 5/149:09 am
SJU
-
IAD
1 stop9h 33m
Frontier
Sun 5/177:27 pm
IAD
-
SJU
1 stop12h 37m
Frontier
Deal found 3/31$194
This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:19 pm
SJU
-
IAD
1 stop21h 27m
Frontier
Mon 4/206:00 am
IAD
-
SJU
1 stop8h 13m
Frontier
Deal found 3/30$195
This Priceline deal was found by Cheapflights users on 3/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:19 pm
SJU
-
IAD
1 stop21h 27m
Frontier
Sun 4/196:20 am
IAD
-
SJU
1 stop7h 48m
Frontier
Deal found 3/31$196
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 4/173:19 pm
SJU
-
IAD
1 stop16h 08m
Frontier
Thu 4/2312:20 pm
IAD
-
SJU
1 stop10h 36m
Frontier
Deal found 4/2$198
This Frontier deal was found by Cheapflights users on 4/2. 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.
Sat 4/117:21 am
SJU
-
IAD
Nonstop4h 12m
Frontier
Sun 4/191:26 pm
IAD
-
SJU
1 stop20h 28m
Frontier
Deal found 4/2$200
This Trip.com deal was found by Cheapflights users on 3/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:21 am
SJU
-
IAD
1 stop9h 25m
Frontier
Mon 4/208:12 am
IAD
-
SJU
1 stop25h 42m
Frontier
Deal found 3/30$201

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 April 2, 2026.

Round-trip from

$174
(Kiwi.com)

One-way from

$108
(Trip.com)

Popular in

March

Cheapest in

January

Average price

$383
From San Juan to Washington, D.C. Dulles Intl
Search Deals
One-way flight from San Juan to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 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

Fri 5/8

4:55 pm-8:56 pm

Nonstop4h 01m

Washington, D.C. Dulles Intl

Sun 5/10

5:24 pm-9:24 pm

Nonstop4h 00m

$333

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Fri 4/17

7:20 am-11:21 am

Nonstop4h 01m

Washington, D.C. Dulles Intl

Wed 4/22

5:24 pm-9:24 pm

Nonstop4h 00m

$333

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 4/23

7:20 am-11:21 am

Nonstop4h 01m

Washington, D.C. Dulles Intl

Sun 4/26

8:34 am-12:34 pm

Nonstop4h 00m

$333

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Wed 4/15

7:40 am-5:28 pm

1 stop9h 48m

Washington, D.C. Dulles Intl

Mon 4/20

8:34 am-12:34 pm

Nonstop4h 00m

$338

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 4/23

7:30 am-4:31 pm

1 stop9h 01m

Washington, D.C. Dulles Intl

Sun 4/26

6:00 am-12:52 pm

1 stop6h 52m

$342

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Thu 4/16

5:34 pm-12:42 am

1 stop7h 08m

Washington, D.C. Dulles Intl

Sun 4/19

6:00 am-4:23 pm

1 stop10h 23m

$342

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Wed 4/15

6:15 am-4:31 pm

1 stop10h 16m

Washington, D.C. Dulles Intl

Tue 4/21

7:06 am-4:23 pm

1 stop9h 17m

$342

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Wed 4/15

5:34 pm-12:42 am

1 stop7h 08m

Washington, D.C. Dulles Intl

Mon 4/20

10:11 am-8:24 pm

1 stop10h 13m

$342

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Sat 5/2

4:55 pm-8:56 pm

Nonstop4h 01m

Washington, D.C. Dulles Intl

Sun 5/3

8:34 am-12:34 pm

Nonstop4h 00m

$366

San JuanWashington, D.C.

SJU - IAD

SJUIAD

San Juan Luis Munoz Marin Intl

Tue 4/7

7:20 am-11:21 am

Nonstop4h 01m

Washington, D.C. Dulles Intl

Tue 4/21

5:24 pm-9:24 pm

Nonstop4h 00m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 21 resultsSorted by cheapest first
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3

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 April 2, 2026.

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 3 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, February is the cheapest month in which you can book a flight from San Juan to Washington, D.C. Dulles Intl Airport (average of $57). Flying from San Juan to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of $281). 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 April 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 April 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?

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 April 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
9,536 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,536 reviews
United Airlines
7.4
Good
9,536 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Frontier
5.7
Fair
3,003 reviews
United Airlines
7.4
Good
9,536 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 can get you from San Juan to Washington, D.C. Dulles Intl Airport in just under 4h 01m. Your travel time will be generally consistent. San Juan and Washington, D.C. Dulles Intl Airport are separated by a distance of 1573 mi. All flights are typically nonstop.

  • 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 $216. Frontier is 75% 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 $128 while deals on Delta start at $146 one-way.

  • 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 (88%), United Airlines (69%) or Frontier (54%) 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 $164. While the most popular route (San Juan Luis Munoz Marin Intl - Washington, D.C. Dulles Intl) can be booked for $206 on average, our data indicates $864 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, February is the cheapest month in which you can book a flight from San Juan to Washington, D.C. Dulles Intl Airport (average of $57). Flying from San Juan to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of $281). 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
Woodbridge
Tysons
Owings Mills
Arlington
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Fredericksburg
Largo
Bowie
Clinton
Towson
Cordova
Manassas

Browse thousands of different options on Cheapflights for your next trip

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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 April 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$76Average$170FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$216Average$404FlexibilityNo cancel feeOn-time69%

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