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$75+ Cheap flights from Washington, D.C. (WAS) 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SJU
mars 16 — mars 231
lun. 3/16
lun. 3/23
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to San Juan are usually found in July or May, booked 89 days in advance, depart on a Sunday or Tuesday and return on a Thursday

Cheap flight deals from Washington, D.C. to San Juan

Cheapest flights from Washington, D.C. to San Juan
Explore the most affordable flight options available from Washington, D.C. to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on février 14, 2026.

This Orbitz deal was found by Cheapflights users on 2/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/36:00 am
BWI
-
SJU
Nonstop3h 47m
Spirit Airlines
mar. 3/108:11 pm
SJU
-
BWI
Nonstop4h 09m
Spirit Airlines
Deal found 2/12$157
This Orbitz deal was found by Cheapflights users on 2/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/246:00 am
BWI
-
SJU
Nonstop3h 47m
Spirit Airlines
mar. 3/39:11 pm
SJU
-
BWI
Nonstop4h 09m
Spirit Airlines
Deal found 2/12$158
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
dim. 4/269:43 pm
BWI
-
SJU
1 stop14h 50m
Frontier
jeu. 4/301:43 pm
SJU
-
BWI
Nonstop4h 12m
Frontier
Deal found 2/11$161
This Orbitz deal was found by Cheapflights users on 2/10. 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.
dim. 2/226:00 am
BWI
-
SJU
Nonstop3h 47m
Spirit Airlines
mer. 2/259:11 pm
SJU
-
BWI
Nonstop4h 09m
Spirit Airlines
Deal found 2/10$162
This Travelocity deal was found by Cheapflights users on 2/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/46:50 pm
BWI
-
SJU
Nonstop3h 50m
Frontier
ven. 5/811:07 am
SJU
-
BWI
1 stop9h 41m
Frontier
Deal found 2/10$163
This Orbitz deal was found by Cheapflights users on 2/10. 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.
lun. 2/236:00 am
BWI
-
SJU
Nonstop3h 47m
Spirit Airlines
sam. 2/289:11 pm
SJU
-
BWI
Nonstop4h 09m
Spirit Airlines
Deal found 2/10$164
This Frontier deal was found by Cheapflights users on 2/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 2/208:20 pm
IAD
-
SJU
Nonstop3h 45m
Frontier
sam. 2/284:17 pm
SJU
-
IAD
Nonstop4h 08m
Frontier
Deal found 2/13$165
This Expedia deal was found by Cheapflights users on 2/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 2/219:43 pm
BWI
-
SJU
Nonstop3h 42m
Multiple Airlines
sam. 2/289:11 pm
SJU
-
BWI
Nonstop4h 09m
Multiple Airlines
Deal found 2/10$165
This Kiwi.com deal was found by Cheapflights users on 2/13. 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.
sam. 4/1112:28 pm
IAD
-
SJU
Nonstop3h 53m
Frontier
mer. 4/153:19 pm
SJU
-
IAD
1 stop16h 08m
Frontier
Deal found 2/13$166
This Frontier deal was found by Cheapflights users on 2/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/2012:43 pm
BWI
-
SJU
1 stop10h 19m
Frontier
ven. 4/241:43 pm
SJU
-
BWI
Nonstop4h 12m
Frontier
Deal found 2/14$168
This Frontier deal was found by Cheapflights users on 2/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/238:20 pm
IAD
-
SJU
Nonstop3h 45m
Frontier
ven. 2/276:00 am
SJU
-
IAD
1 stop13h 07m
Frontier
Deal found 2/14$169
This Expedia deal was found by Cheapflights users on 2/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/246:00 am
BWI
-
SJU
Nonstop3h 47m
Multiple Airlines
sam. 2/287:05 am
SJU
-
BWI
1 stop11h 42m
Multiple Airlines
Deal found 2/10$169

Find flight deals from Washington, D.C. to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 février 14, 2026.

Round-trip from

$157
(Orbitz)

One-way from

$75
(Expedia)

Popular in

December

Cheapest in

July

Average price

$310
From Washington, D.C. (WAS) to San Juan
Search Deals
One-way flight from Washington, D.C. (WAS) to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 février 14, 2026.
Use the filters below to find and compare flights from Washington, D.C. to San Juan that are best for you.

Fly from

Washington, D.C.

Fly to

San Juan

Route

Depart

Return

Price

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 5/12

8:34 am-12:34 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

mar. 5/12

4:55 pm-8:56 pm

Nonstop4h 01m

$248

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

lun. 4/13

8:34 am-12:34 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

ven. 4/17

7:40 am-5:28 pm

1 stop9h 48m

$258

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mer. 5/13

10:08 am-8:34 pm

1 stop10h 26m

San Juan Luis Munoz Marin Intl

mer. 5/20

4:55 pm-8:56 pm

Nonstop4h 01m

$258

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mer. 2/25

12:35 pm-11:58 pm

1 stop10h 23m

San Juan Luis Munoz Marin Intl

ven. 2/27

6:42 pm-12:21 am

1 stop6h 39m

$262

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

dim. 3/8

6:05 am-5:40 pm

1 stop11h 35m

San Juan Luis Munoz Marin Intl

jeu. 3/12

5:30 am-12:00 pm

1 stop6h 30m

$262

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mer. 3/4

6:00 am-5:27 pm

1 stop10h 27m

San Juan Luis Munoz Marin Intl

mar. 3/10

2:44 pm-12:27 am

1 stop9h 43m

$262

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 2/24

10:08 am-5:27 pm

1 stop6h 19m

San Juan Luis Munoz Marin Intl

jeu. 2/26

3:55 pm-12:21 am

1 stop9h 26m

$262

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

mar. 5/26

6:33 am-1:45 pm

1 stop7h 12m

San Juan Luis Munoz Marin Intl

lun. 6/1

1:00 am-7:22 am

1 stop6h 22m

$262

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

mar. 2/24

1:40 pm-9:12 pm

1 stop6h 32m

San Juan Luis Munoz Marin Intl

jeu. 2/26

6:15 am-12:40 pm

1 stop7h 25m

$262

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

sam. 5/9

10:08 am-8:34 pm

1 stop10h 26m

San Juan Luis Munoz Marin Intl

lun. 5/11

1:00 am-7:28 am

1 stop6h 28m

$262

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

Showing 1-10 of 60 results
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Best time to book a flight from Washington, D.C. to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Washington, D.C. 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. to San Juan

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to San Juan. Price data was last updated on February 6, 2026.

To ensure you get the cheapest price possible for a flight from Washington, D.C. to San Juan, you should look to book at least 89 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 Washington, D.C. to San Juan?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to San Juan (average of $73). Flying from Washington, D.C. to San Juan in December is currently the most expensive (average of $166). 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 WAS to SJU?

Find hourly flight availability from Washington, D.C. 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 février 14, 2026.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to San Juan at noon. If you’re flexible enough to do this you can expect to save up to 24% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to San Juan. Price data was last updated on February 7, 2026.

Travelers seeking maximum savings on their Washington, D.C. to San Juan flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. to San Juan

Explore weekly flight availability from Washington, D.C. 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 février 14, 2026.

The most flights from WAS to PR1 are scheduled on a Monday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

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

How often are flights from Washington, D.C. to San Juan delayed?

About 18% of weekly flights between Washington, D.C. and San Juan have experienced delays in the past year, with the average delay time being 130 minutes.

What is the most punctual flight time for Washington, D.C. to San Juan 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 Sunday 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 San Juan flights?

Over the last year, JetBlue have had the lowest number of delays on this route, with just 16% of flights being delayed.

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 février 14, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to San Juan, such as Southwest, United Airlines, and JetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,284 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,284 reviews
Southwest
8.0
Very good
4,284 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,291 reviews
Southwest
8.0
Very good
4,284 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,898 reviews
Southwest
8.0
Very good
4,284 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Spirit Airlines
6.3
Okay
8,451 reviews
Southwest
8.0
Very good
4,284 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,052 reviews
Southwest
8.0
Very good
4,284 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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. to San Juan?

    Departing from Washington, D.C. to San Juan will take you 4h. There are 1573 mi between Washington, D.C. and San Juan. This flight may include one or multiple stops.

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

    Our cheapest airline available from Washington, D.C. to San Juan is Frontier. Our recent data shows that you can find tickets from as low as $89 on this airline. Additional options worth looking into are Spirit Airlines and Delta, starting at $103 and $134 round-trip. Frontier is currently priced 73% below the average price you’ll pay for this route.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $54. Delta flights start at $68 while deals on Southwest start at $82 one-way.

  • What are the most popular routes from Washington, D.C. to San Juan?

    The most popular flight routes from Washington, D.C. to San Juan are Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl, Baltimore/Washington - San Juan Luis Munoz Marin Intl and Washington, D.C. Reagan-National - San Juan Luis Munoz Marin Intl.

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

    The top 3 most reliable airlines when flying from Washington, D.C. to San Juan are Frontier (78%), Air Canada (74%) and United Airlines (74%).

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

    The cheapest flight price from Washington, D.C. to San Juan is $45. On average you can expect to pay $562. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $192.

  • Can I find deals for flights from Washington, D.C. to San Juan that include hotel bookings?

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

  • How can I find direct flights from Washington, D.C. to San Juan?

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

  • Can I find deals for business class flights from Washington, D.C. to San Juan?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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. to San Juan?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to San Juan (average of $73). Flying from Washington, D.C. to San Juan in December is currently the most expensive (average of $166). 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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Top 7 airlines flying from Washington, D.C. to San Juan

Discover the top 7 airlines that operate flights from Washington, D.C. 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 février 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$89Average$318FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$103Average$264FlexibilityNo cancel feeOn-time65%
DeltaCheapest$134Average$361FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$156Average$405FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$219Average$426FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$220Average$465FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$235Average$453FlexibilityNo cancel feeOn-time69%

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