HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Puerto Rico

$117+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJU
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Puerto Rico with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 septiembre 17, 2025.

Round-trip from

$168

One-way from

$117
(Frontier)

Popular in

December

Cheapest in

July

Average price

$355

Good round-trip deal

$297 or less

Good one-way deal

$173 or less
From Washington, D.C. Dulles Intl to Puerto Rico
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Puerto Rico
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Puerto Rico.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Puerto Rico.
Search Deals

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 septiembre 17, 2025.

This deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/167:26 pmIAD - SJU
Nonstop3h 52mFrontier
vie. 11/214:08 pmSJU - IAD
Nonstop4h 03mFrontier
Deal found 9/15$168
This Kiwi.com deal was found by Cheapflights users on 9/17. 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
jue. 10/307:30 amSJU - IAD
1 stop13h 27mFrontier
Deal found 9/17$176
This Kiwi.com deal was found by Cheapflights users on 9/15. 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. 11/27:26 pmIAD - SJU
Nonstop3h 52mFrontier
dom. 11/93:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$181
This Frontier deal was found by Cheapflights users on 9/15. 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. 10/199:07 pmIAD - SJU
Nonstop3h 52mFrontier
dom. 11/23:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$183
This Frontier deal was found by Cheapflights users on 9/15. 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.
jue. 10/308:26 pmIAD - SJU
Nonstop3h 52mFrontier
jue. 11/63:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$184
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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.
dom. 10/269:07 pmIAD - SJU
Nonstop3h 52mFrontier
dom. 11/23:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/16$187
This CheapOair deal was found by Cheapflights users on 9/15. 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. 10/264:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$189
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 9/16$191
This Frontier deal was found by Cheapflights users on 9/16. 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.
jue. 12/1110:08 amIAD - SJU
Nonstop3h 54mFrontier
mié. 12/173:59 pmSJU - IAD
1 stop7h 20mFrontier
Deal found 9/16$192
This Frontier deal was found by Cheapflights users on 9/15. 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. 10/56:10 amIAD - SJU
1 stop8h 01mFrontier
jue. 10/94:26 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/15$197
This Frontier deal was found by Cheapflights users on 9/16. 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
mié. 10/295:51 pmSJU - IAD
2 stops22h 43mFrontier
Deal found 9/16$201
This Priceline deal was found by Cheapflights users on 9/16. 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.
lun. 10/209:28 pmIAD - BQN
1 stop28h 36mFrontier
vie. 10/242:59 amBQN - IAD
1 stop17h 54mFrontier
Deal found 9/16$250

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 septiembre 17, 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.Aguadilla

IAD - BQN

IADBQN

Washington, D.C. Dulles Intl

lun. 10/20

9:28 pm-2:04 am

1 stop28h 36m

Aguadilla Borinquen

vie. 10/24

2:59 am-8:53 pm

1 stop17h 54m

$250

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

sáb. 9/20

7:14 pm-9:30 am

1 stop14h 16m

Ponce Mercedita

lun. 9/22

10:15 am-6:24 pm

1 stop8h 09m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

jue. 9/25

7:14 pm-9:30 am

1 stop14h 16m

Ponce Mercedita

dom. 9/28

10:15 am-6:14 pm

1 stop7h 59m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

vie. 11/14

8:36 pm-11:20 am

1 stop13h 44m

Ponce Mercedita

lun. 11/17

12:15 pm-7:52 pm

1 stop8h 37m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

dom. 11/2

8:36 pm-11:20 am

1 stop13h 44m

Ponce Mercedita

vie. 11/7

12:15 pm-7:51 pm

1 stop8h 36m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

dom. 9/28

7:14 pm-9:30 am

1 stop14h 16m

Ponce Mercedita

vie. 10/3

10:15 am-6:19 pm

1 stop8h 04m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

jue. 9/25

7:14 pm-9:30 am

1 stop14h 16m

Ponce Mercedita

lun. 9/29

10:15 am-6:24 pm

1 stop8h 09m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

jue. 10/2

7:14 pm-9:30 am

1 stop14h 16m

Ponce Mercedita

dom. 10/5

10:15 am-6:14 pm

1 stop7h 59m

$252

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

jue. 10/2

7:14 pm-9:30 am

1 stop14h 16m

Ponce Mercedita

lun. 10/6

10:15 am-6:24 pm

1 stop8h 09m

$252

Washington, D.C.Aguadilla

IAD - BQN

IADBQN

Washington, D.C. Dulles Intl

dom. 9/21

7:09 pm-2:27 am

1 stop7h 18m

Aguadilla Borinquen

dom. 9/28

3:32 am-6:24 pm

1 stop14h 52m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 54 results
1
2
3
...
6

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 septiembre 17, 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 septiembre 17, 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
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,023 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
3,173 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Puerto Rico?

    Airlines like Frontier and United Airlines fly from Washington, D.C. Dulles Intl Airport to Puerto Rico in about 3h 50m. The time it takes to get you to your destination can typically vary by up to 24h 46m. There are 1573 mi between Washington, D.C. Dulles Intl Airport and Puerto Rico. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Puerto Rico are United Airlines ($118), Delta ($123), and Frontier ($124).

  • 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 - Culebra.

  • 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 (75%), United Airlines (75%), Brussels Airlines (70%).

  • 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 $77. On average you can expect to pay $625. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $148.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Dulles Intl to Oranjestad flights
Baltimore to Punta Cana flights
Dulles Intl to Saint Thomas Island flights
Reagan-National to Punta Cana flights
Baltimore to Oranjestad flights
Baltimore to Montego Bay flights
Reagan-National to Montego Bay flights
Dulles Intl to Nassau flights
Reagan-National to Nassau flights
Baltimore to Saint Thomas Island flights
Dulles Intl to Providenciales flights
Reagan-National to Saint Thomas Island flights
Reagan-National to Oranjestad flights
Baltimore to Nassau flights
Dulles Intl to Santo Domingo flights
Dulles Intl to Simpson Bay flights
Dulles Intl to Willemstad flights
Baltimore to Santo Domingo flights
Reagan-National to Simpson Bay flights
Baltimore to Providenciales flights
Reagan-National to Santo Domingo flights
Dulles Intl to Ponce flights
Reagan-National to Providenciales flights
Baltimore to Simpson Bay flights
Reagan-National to Willemstad flights
Baltimore to Willemstad flights
Dulles Intl to Bridgetown flights
Dulles Intl to Castries flights
Dulles Intl to Port of Spain flights
Baltimore to Castries flights
Baltimore to Bridgetown flights
Baltimore to George Town flights
Reagan-National to Kingston flights
Reagan-National to Castries flights
Reagan-National to Port of Spain flights
Reagan-National to Bridgetown flights
Baltimore to Kingston flights
Dulles Intl to Kingston flights
Reagan-National to George Town flights
Baltimore to Port of Spain flights
Dulles Intl to George Town flights
Reagan-National to Christiansted flights
Dulles Intl to Christiansted flights
Dulles Intl to St. John's flights
Baltimore to Christiansted 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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$82Average$275FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$135Average$288FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$145Average$484FlexibilityNo cancel feeOn-time71%
DeltaCheapest$164Average$368FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$168Average$390FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$277Average$489FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.