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$93+ Cheap flights from Dulles Intl (IAD) to Puerto Rico

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJU
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheap flight deals from Dulles Intl to Puerto Rico

Keep the following information in mind while searching for Dulles Intl to Puerto Rico flight deals. Data was last updated agosto 14, 2025.

Round-trip from

$178
(CheapOair)

One-way from

$93
(Cheapflightsfares)

Popular in

December

Cheapest in

March

Average price

$328

Good round-trip deal

$222 or less

Good one-way deal

$113 or less
From Washington, D.C. Dulles Intl to Puerto Rico
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One-way flight from Washington, D.C. Dulles Intl to Puerto Rico
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Highest demand for flights based on searches. 11% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Puerto Rico.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Puerto Rico.
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Find flight deals from Dulles Intl to Puerto Rico

Cheapest flights from Dulles Intl to Puerto Rico
Explore the most affordable flight options available from Dulles Intl to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

This CheapOair deal was found by Cheapflights users on 8/12. 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.
jue. 10/3011:09 amIAD - SJU
Nonstop3h 52mFrontier
dom. 11/25:25 amSJU - IAD
Nonstop3h 56mFrontier
Deal found 8/12$178
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
jue. 10/169:07 pmIAD - SJU
Nonstop3h 52mFrontier
dom. 10/194:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 8/12$181
This Frontier deal was found by Cheapflights users on 8/12. 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.
dom. 10/129:07 pmIAD - SJU
Nonstop3h 52mFrontier
jue. 10/164:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 8/12$182
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
jue. 10/239:07 pmIAD - SJU
Nonstop3h 52mFrontier
lun. 10/273:14 pmSJU - IAD
1 stop8h 57mFrontier
Deal found 8/12$183
This Kiwi.com deal was found by Cheapflights users on 8/12. 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. 11/910:09 amIAD - SJU
Nonstop3h 52mFrontier
jue. 11/1310:07 amSJU - IAD
1 stop10h 36mFrontier
Deal found 8/12$184
This Frontier deal was found by Cheapflights users on 8/12. 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.
dom. 10/269:07 pmIAD - SJU
Nonstop3h 52mFrontier
jue. 10/306:25 amSJU - IAD
Nonstop3h 56mFrontier
Deal found 8/12$186
This American Airlines deal was found by Cheapflights users on 8/12. 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.
mié. 10/298:09 amIAD - SJU
1 stop7h 46mAmerican Airlines
mar. 11/45:59 pmSJU - IAD
1 stop6h 08mAmerican Airlines
Deal found 8/12$190
This Kiwi.com deal was found by Cheapflights users on 8/12. 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. 8/1712:31 pmIAD - SJU
Nonstop3h 57mFrontier
mié. 8/203:59 amSJU - IAD
1 stop16h 49mFrontier
Deal found 8/12$192
This CheapOair deal was found by Cheapflights users on 8/12. 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.
jue. 10/239:07 pmIAD - SJU
Nonstop3h 52mFrontier
dom. 10/269:19 pmSJU - IAD
1 stop23h 14mFrontier
Deal found 8/12$193
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
jue. 9/257:14 pmIAD - SJU
1 stop7h 20mFrontier
jue. 10/94:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 8/13$194
This Kiwi.com deal was found by Cheapflights users on 8/13. 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. 11/97:26 pmIAD - SJU
Nonstop3h 52mFrontier
dom. 11/1610:39 pmSJU - IAD
1 stop22h 12mFrontier
Deal found 8/13$196
This Priceline deal was found by Cheapflights users on 8/14. 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.
jue. 9/117:14 pmIAD - BQN
1 stop7h 13mFrontier
sáb. 9/133:32 amBQN - IAD
1 stop14h 42mFrontier
Deal found 8/14$265

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Puerto Rico 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 agosto 14, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Puerto Rico that are best for you.

Fly from

Dulles Intl

Fly to

Puerto Rico

Route

Depart

Return

Price

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

dom. 11/9

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

jue. 11/13

8:10 am-3:55 pm

1 stop8h 45m

$211

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 11/11

6:10 am-2:15 pm

1 stop7h 05m

San Juan Luis Munoz Marin Intl

jue. 11/20

1:50 pm-12:07 am

1 stop11h 17m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

lun. 11/10

3:00 pm-11:17 pm

1 stop7h 17m

San Juan Luis Munoz Marin Intl

jue. 11/13

3:30 pm-9:13 pm

1 stop6h 43m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mié. 11/12

6:10 am-2:15 pm

1 stop7h 05m

San Juan Luis Munoz Marin Intl

jue. 11/20

7:30 am-4:36 pm

1 stop10h 06m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 11/11

12:35 pm-11:17 pm

1 stop9h 42m

San Juan Luis Munoz Marin Intl

vie. 11/14

7:30 am-4:36 pm

1 stop10h 06m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 11/11

6:10 am-2:15 pm

1 stop7h 05m

San Juan Luis Munoz Marin Intl

mié. 11/19

3:25 pm-11:00 pm

1 stop8h 35m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mié. 11/12

3:00 pm-11:17 pm

1 stop7h 17m

San Juan Luis Munoz Marin Intl

mié. 11/19

3:25 pm-11:00 pm

1 stop8h 35m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 11/4

10:11 am-5:33 pm

1 stop6h 22m

San Juan Luis Munoz Marin Intl

jue. 11/13

1:50 pm-12:07 am

1 stop11h 17m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mié. 11/12

3:00 pm-11:17 pm

1 stop7h 17m

San Juan Luis Munoz Marin Intl

vie. 11/14

7:30 am-4:36 pm

1 stop10h 06m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 11/4

10:11 am-5:33 pm

1 stop6h 22m

San Juan Luis Munoz Marin Intl

mié. 11/12

3:25 pm-11:00 pm

1 stop8h 35m

$215

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 54 results
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Best time to book a flight from Dulles Intl to Puerto Rico

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico 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 Puerto Rico

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Puerto Rico (average of $254). Flying from Washington, D.C. Dulles Intl Airport to Puerto Rico 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 PR?

Find hourly flight availability from Dulles Intl to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 14, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Puerto Rico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. 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 Puerto Rico. Reviews last updated agosto 14, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Puerto Rico, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
7,980 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
8,046 reviews
Delta
8.0
Very good
7,980 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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
3,217 reviews
Delta
8.0
Very good
7,980 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

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 Puerto Rico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the most popular routes from Washington, D.C. Dulles Intl Airport to Puerto Rico?

    The most popular route from Washington, D.C. Dulles Intl Airport to Puerto Rico is Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl. You may also consider Washington, D.C. Dulles Intl - Ponce Mercedita or Washington, D.C. Dulles Intl - Mayagüez Eugenio M De Hostos.

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

    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 Puerto Rico on time: Air Canada (69%), United Airlines (69%), Brussels Airlines (50%).

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

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Puerto Rico is $75. On average you can expect to pay $515. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $158.

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

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

  • How can I find direct flights from Dulles Intl to Puerto Rico?

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

  • Can I find deals for business class flights from Dulles Intl to Puerto Rico?

    Yes. Cheapflights offers flight deals from Dulles Intl to Puerto Rico 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 Puerto Rico?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Puerto Rico (average of $254). Flying from Washington, D.C. Dulles Intl Airport to Puerto Rico 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

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Alternative routes for Dulles Intl to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Luis Munoz Marin Intl flights
Baltimore to Luis Munoz Marin Intl flights
Reagan-National to Luis Munoz Marin Intl flights
Dulles Intl to Punta Cana flights
Dulles Intl to Montego Bay flights
Baltimore to Punta Cana flights
Dulles Intl to Oranjestad flights
Reagan-National to Punta Cana flights
Dulles Intl to Nassau flights
Baltimore to Oranjestad flights
Reagan-National to Montego Bay flights
Dulles Intl to Saint Thomas Island flights
Reagan-National to Nassau flights
Baltimore to Nassau flights
Reagan-National to Oranjestad flights
Dulles Intl to Providenciales flights
Baltimore to Montego Bay flights
Baltimore to Saint Thomas Island flights
Dulles Intl to Castries flights
Reagan-National to Saint Thomas Island flights
Baltimore to Providenciales flights
Dulles Intl to Santo Domingo flights
Baltimore to Santo Domingo flights
Dulles Intl to Willemstad flights
Dulles Intl to Simpson Bay flights
Reagan-National to Providenciales flights
Reagan-National to Castries flights
Reagan-National to Port of Spain flights
Reagan-National to Santo Domingo flights
Reagan-National to Simpson Bay flights
Dulles Intl to Port of Spain flights
Baltimore to Port of Spain flights
Baltimore to Castries flights
Dulles Intl to Bridgetown flights
Baltimore to Simpson Bay flights
Dulles Intl to George Town flights
Reagan-National to Bridgetown flights
Reagan-National to Willemstad flights
Baltimore to Willemstad flights
Baltimore to George Town flights
Baltimore to Bridgetown flights
Dulles Intl to Ponce flights
Reagan-National to Ponce flights
Dulles Intl to Kingston flights
Reagan-National to George Town flights
Baltimore to Kingston flights
Baltimore to Santiago de los Caballeros flights
Reagan-National to Kingston flights
Dulles Intl to St. John's flights
Dulles Intl to Santiago de los Caballeros flights

Top 6 airlines flying from Dulles Intl to Puerto Rico

Discover the top 6 airlines that operate flights from Dulles Intl to Puerto Rico. 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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$82Average$272FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$135Average$288FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$180Average$419FlexibilityNo cancel feeOn-time62%
DeltaCheapest$215Average$387FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$224Average$506FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$281Average$469FlexibilityNo cancel feeOn-time69%

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