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San Juan

$83+ Cheap flights from Dulles Intl (IAD) to San Juan

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJU
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Juan are usually found in June or October, booked 90 days in advance, depart on a Tuesday or Sunday and return on a Thursday

Find flight deals from Dulles Intl to San Juan

Cheapest flights from Dulles Intl to San Juan
Explore the most affordable flight options available from Dulles Intl to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
lun. 11/246:55 amIAD - SJU
2 stops12h 32mMultiple Airlines
mar. 11/254:08 pmSJU - IAD
Nonstop4h 03mMultiple Airlines
Deal found 11/6$187
This Super.com deal was found by Cheapflights users on 11/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1110:38 amIAD - SJU
Nonstop3h 54mFrontier
dom. 12/146:30 amSJU - IAD
Nonstop4h 13mFrontier
Deal found 11/6$189
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
mié. 11/198:40 amIAD - SJU
1 stop15h 26mFrontier
sáb. 11/223:58 pmSJU - IAD
Nonstop4h 03mFrontier
Deal found 11/6$190
This Super.com deal was found by Cheapflights users on 11/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/710:38 amIAD - SJU
Nonstop3h 54mFrontier
jue. 12/116:30 amSJU - IAD
Nonstop4h 13mFrontier
Deal found 11/5$199
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
dom. 11/238:06 pmIAD - SJU
Nonstop3h 47mFrontier
mar. 11/259:30 pmSJU - IAD
1 stop15h 22mFrontier
Deal found 11/6$201
This Super.com deal was found by Cheapflights users on 11/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/710:38 amIAD - SJU
Nonstop3h 54mFrontier
dom. 12/146:30 amSJU - IAD
Nonstop4h 13mFrontier
Deal found 11/5$203
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
dom. 11/164:04 pmIAD - SJU
1 stop8h 28mFrontier
sáb. 11/223:58 pmSJU - IAD
Nonstop4h 03mFrontier
Deal found 11/6$204
This Super.com deal was found by Cheapflights users on 11/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/288:06 pmIAD - SJU
Nonstop3h 47mFrontier
sáb. 12/64:31 pmSJU - IAD
1 stop7h 34mFrontier
Deal found 11/6$208
This CheapOair deal was found by Cheapflights users on 11/5. 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.
sáb. 11/297:56 pmIAD - SJU
Nonstop3h 47mFrontier
vie. 12/53:55 amSJU - IAD
1 stop17h 29mFrontier
Deal found 11/5$210
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
dom. 11/167:26 pmIAD - SJU
Nonstop3h 52mMultiple Airlines
sáb. 11/2211:55 amSJU - IAD
2 stops13h 04mMultiple Airlines
Deal found 11/6$211

Cheap flight deals from Dulles Intl to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to San Juan (PR1). 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 noviembre 6, 2025.

Round-trip from

$187
(Kiwi.com)

One-way from

$83
(Kiwi.com)

Popular in

April

Cheapest in

June

Average price

$412
From Washington, D.C. Dulles Intl to San Juan
Search Deals
One-way flight from Washington, D.C. Dulles Intl to San Juan
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Highest demand for flights based on searches. 13% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to San Juan 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 noviembre 6, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Juan that are best for you.

Fly from

Dulles Intl

Fly to

San Juan

Route

Depart

Return

Price

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

lun. 1/19

7:15 am-2:30 pm

1 stop6h 15m

San Juan Luis Munoz Marin Intl

vie. 1/23

6:15 am-11:44 am

1 stop6h 29m

$225

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

jue. 12/11

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

jue. 12/18

5:50 pm-8:55 pm

Nonstop4h 05m

$226

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

lun. 11/17

6:00 am-4:36 pm

1 stop9h 36m

San Juan Luis Munoz Marin Intl

vie. 11/21

4:52 pm-11:59 pm

1 stop8h 07m

$316

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 1/27

6:00 am-2:40 pm

1 stop7h 40m

San Juan Luis Munoz Marin Intl

vie. 1/30

8:10 am-11:15 am

Nonstop4h 05m

$348

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

vie. 11/14

6:00 am-2:40 pm

1 stop7h 40m

San Juan Luis Munoz Marin Intl

mié. 11/19

8:10 am-5:30 pm

1 stop10h 20m

$351

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

dom. 11/9

10:05 am-5:26 pm

1 stop6h 21m

San Juan Luis Munoz Marin Intl

lun. 11/17

1:57 pm-9:32 pm

1 stop8h 35m

$354

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

dom. 1/25

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

mar. 2/3

2:15 pm-9:13 pm

1 stop7h 58m

$385

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 1/27

8:27 am-1:17 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

jue. 1/29

8:35 am-4:00 pm

1 stop8h 25m

$385

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 1/27

6:00 am-2:40 pm

1 stop7h 40m

San Juan Luis Munoz Marin Intl

vie. 1/30

2:05 am-4:00 pm

2 stops14h 55m

$389

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

lun. 11/24

6:00 am-4:36 pm

1 stop9h 36m

San Juan Luis Munoz Marin Intl

jue. 11/27

8:10 am-4:58 pm

1 stop9h 48m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 23 results
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Best time to book a flight from Dulles Intl to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan 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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to San Juan. Price data was last updated on October 31, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to San Juan may vary depending on when you book. For the best chance of a lower fare, look to book 90 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan (average of $87). Flying from Washington, D.C. Dulles Intl Airport to San Juan in September is currently the most expensive (average of $272). 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 San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 6, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to San Juan at noon. Doing so could potentially save you 48% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Juan flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday 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

Explore weekly flight availability from Dulles Intl to San Juan. 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 noviembre 6, 2025.

The most flights from IAD to PR1 are scheduled on a Thursday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated noviembre 6, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Washington, D.C. Dulles Intl Airport to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,001 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,001 reviews
Delta
7.9
Good
8,001 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,007 reviews
Delta
7.9
Good
8,001 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,040 reviews
Delta
7.9
Good
8,001 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Spirit Airlines
6.3
Okay
8,122 reviews
Delta
7.9
Good
8,001 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.8
Fair
3,115 reviews
Delta
7.9
Good
8,001 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to San Juan. 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?

    Departing from Washington, D.C. Dulles Intl Airport to San Juan will take you 3h 50m. Washington, D.C. Dulles Intl Airport and San Juan are separated by a distance of 1573 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to San Juan is Frontier. Our recent data shows that you can find tickets from as low as $114 on this airline. Additional options worth looking into are American Airlines and Spirit Airlines, starting at $145 and $153 round-trip. Frontier is priced at 72% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $83. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to San Juan for a low price.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to San Juan on time: Air Canada (61%), United Airlines (61%), Frontier (57%).

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

    On average you can expect to pay $295 for a flight from Washington, D.C. Dulles Intl Airport to San Juan. The cheapest flight overall is $69 while the most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl) is currently priced at $174.

  • Can I find deals for flights from Dulles Intl to San Juan that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to San Juan?

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

  • Can I find deals for business class flights from Dulles Intl to San Juan?

    Yes. Cheapflights offers flight deals from Dulles Intl to San Juan 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?

    Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan (average of $87). Flying from Washington, D.C. Dulles Intl Airport to San Juan in September is currently the most expensive (average of $272). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Dulles Intl to San Juan

Discover the top 6 airlines that operate flights from Dulles Intl to San Juan. 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 noviembre 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$114Average$282FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$145Average$484FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$153Average$288FlexibilityNo cancel feeOn-time65%
DeltaCheapest$158Average$350FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$161Average$386FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$273Average$495FlexibilityNo cancel feeOn-time69%

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