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$144+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJU
Sep 1 — Sep 83
Tue 9/1
Tue 9/8
3 travelers, Economy
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Cheap 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 August 2, 2026.

This eDestinos deal was found by Cheapflights users on 8/2. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:52 pm
IAD
-
SJU
1 stop18h 14m
Frontier
Sun 8/308:57 pm
SJU
-
IAD
1 stop12h 53m
Frontier
Deal found 8/2$304
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 8/2611:05 am
IAD
-
SJU
1 stop15h 10m
Frontier
Mon 8/318:57 pm
SJU
-
IAD
1 stop13h 10m
Frontier
Deal found 7/30$305
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Mon 8/2412:28 pm
IAD
-
SJU
1 stop12h 28m
Frontier
Wed 8/266:35 am
SJU
-
IAD
1 stop13h 09m
Frontier
Deal found 7/28$306
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:00 am
IAD
-
SJU
Nonstop3h 54m
United Airlines
Sat 8/294:55 pm
SJU
-
IAD
Nonstop3h 52m
United Airlines
Deal found 7/30$307
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Sat 8/224:52 pm
IAD
-
SJU
1 stop9h 23m
Frontier
Tue 8/258:57 pm
SJU
-
IAD
1 stop13h 10m
Frontier
Deal found 7/31$308
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Tue 9/111:05 am
IAD
-
SJU
1 stop8h 33m
Frontier
Sat 9/59:16 am
SJU
-
IAD
1 stop6h 51m
Frontier
Deal found 7/28$309
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 8/106:09 pm
IAD
-
SJU
1 stop22h 02m
Multiple Airlines
Thu 8/1310:48 pm
SJU
-
IAD
2 stops12h 32m
Multiple Airlines
Deal found 8/1$310
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:40 am
IAD
-
SJU
Nonstop3h 54m
United Airlines
Sat 8/294:55 pm
SJU
-
IAD
Nonstop3h 52m
United Airlines
Deal found 7/30$311
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:00 am
IAD
-
SJU
Nonstop3h 54m
United Airlines
Tue 9/13:56 pm
SJU
-
IAD
1 stop8h 48m
United Airlines
Deal found 7/29$312
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Wed 8/268:39 pm
IAD
-
SJU
2 stops27h 55m
Frontier
Tue 9/13:10 am
SJU
-
IAD
1 stop6h 57m
Frontier
Deal found 7/28$313
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Wed 8/1911:05 am
IAD
-
SJU
1 stop8h 47m
Frontier
Tue 8/256:35 am
SJU
-
IAD
1 stop13h 09m
Frontier
Deal found 7/28$314
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Fri 9/412:28 pm
IAD
-
SJU
1 stop12h 28m
Frontier
Wed 9/98:45 am
SJU
-
IAD
1 stop11h 24m
Frontier
Deal found 7/29$315

Find 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 August 2, 2026.

Round-trip from

$304
(eDestinos)

One-way from

$144
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$335

Good round-trip deal

$421 or less

Good one-way deal

$200 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 ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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

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 August 2, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 8/29

6:15 am-1:45 pm

1 stop7h 30m

San Juan Luis Munoz Marin Intl

Wed 9/2

2:20 pm-12:30 am

1 stop10h 10m

$316

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 8/30

6:30 am-3:42 pm

1 stop9h 12m

San Juan Luis Munoz Marin Intl

Tue 9/1

3:56 pm-12:44 am

1 stop8h 48m

$320

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Tue 9/1

9:00 am-12:54 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Tue 9/15

3:56 pm-12:44 am

1 stop8h 48m

$322

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 8/31

12:29 pm-11:52 pm

1 stop11h 23m

San Juan Luis Munoz Marin Intl

Fri 9/4

2:59 pm-12:34 am

1 stop9h 35m

$326

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 9/2

6:16 am-1:45 pm

1 stop7h 29m

San Juan Luis Munoz Marin Intl

Sat 9/5

1:00 am-7:19 am

1 stop6h 19m

$326

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

Wed 9/9

11:12 am-10:54 am

1 stop23h 42m

Ponce Mercedita

Sun 9/13

10:05 am-10:17 am

1 stop24h 12m

$336

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Thu 10/29

6:10 am-12:15 pm

1 stop6h 05m

San Juan Luis Munoz Marin Intl

Mon 11/2

8:05 am-11:09 am

Nonstop4h 04m

$347

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

Sun 8/23

4:52 pm-10:02 am

1 stop17h 10m

Ponce Mercedita

Sun 8/30

10:47 am-9:50 am

1 stop23h 03m

$356

Washington, D.C.Ponce

IAD - PSE

IADPSE

Washington, D.C. Dulles Intl

Thu 9/10

11:12 am-9:18 am

1 stop22h 06m

Ponce Mercedita

Mon 9/14

10:05 am-10:17 am

1 stop24h 12m

$356

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Thu 12/3

12:35 pm-11:55 pm

1 stop10h 20m

San Juan Luis Munoz Marin Intl

Sat 12/5

6:35 pm-12:39 am

1 stop7h 04m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Puerto Rico (average of $325). Flying from Washington, D.C. Dulles Intl Airport to Puerto Rico in July is currently the most expensive (average of $512). 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 August 2, 2026.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Puerto Rico at noon. Doing so could potentially save you 44% on the flight price compared to flying in the morning, which is usually more expensive.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Puerto Rico

Explore weekly flight availability from Dulles Intl to Puerto Rico. 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 August 2, 2026.

The most flights from IAD to PR0 are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

How often are flights from Washington, D.C. to Puerto Rico delayed?

About 20% of weekly flights between Washington, D.C. and Puerto Rico have experienced delays in the past year, with the average delay time being 126 minutes.

What is the most punctual flight time for Washington, D.C. to Puerto Rico flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to Puerto Rico flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 17% of flights being delayed.

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

The best time to book flights from Washington, D.C. Dulles Intl Airport to Puerto Rico is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 August 2, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Puerto Rico, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,493 reviews

Comfort

7.8

Crew

8.5

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,493 reviews
Delta
7.8
Good
8,493 reviews

Comfort

7.8

Crew

8.5

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
10,061 reviews
Delta
7.8
Good
8,493 reviews

Comfort

7.8

Crew

8.5

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,846 reviews
Delta
7.8
Good
8,493 reviews

Comfort

7.8

Crew

8.5

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
JetBlue
7.1
Good
3,030 reviews
Delta
7.8
Good
8,493 reviews

Comfort

7.8

Crew

8.5

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Frontier
5.6
Fair
2,741 reviews
Delta
7.8
Good
8,493 reviews

Comfort

7.8

Crew

8.5

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 United Airlines, Delta, and Frontier fly from Washington, D.C. Dulles Intl Airport to Puerto Rico in about 7h 30m. The time it takes to get you to your destination can typically vary by up to 16h 12m. 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 Frontier ($54), Delta ($112), and United Airlines ($126).

  • 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 - Aguadilla Borinquen.

  • 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: Brussels Airlines (73%), Air Canada (73%), United Airlines (73%).

  • 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 $178. On average you can expect to pay $859. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $258.

  • 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Puerto Rico (average of $325). Flying from Washington, D.C. Dulles Intl Airport to Puerto Rico in July is currently the most expensive (average of $512). 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 5 airlines flying from Dulles Intl to Puerto Rico

Discover the top 5 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 August 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$89Average$315FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$323FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$161Average$462FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$225Average$438FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$265Average$485FlexibilityNo cancel feeOn-time69%

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