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$88+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SJU
May 10 — May 171
Sun 5/10
Sun 5/17
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 October, booked 57 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 April 10, 2026.

This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:40 pm
BWI
-
SJU
Nonstop3h 50m
Frontier
Sat 5/29:58 am
SJU
-
BWI
1 stop10h 53m
Frontier
Deal found 4/6$182
This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:39 pm
BWI
-
SJU
Nonstop3h 50m
Frontier
Mon 4/201:42 pm
SJU
-
BWI
Nonstop4h 12m
Frontier
Deal found 4/6$184
This eDestinos deal was found by Cheapflights users on 4/6. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:35 pm
BWI
-
SJU
1 stop8h 26m
Frontier
Tue 4/286:30 am
SJU
-
BWI
1 stop10h 10m
Frontier
Deal found 4/6$185
This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:43 pm
BWI
-
SJU
1 stop10h 46m
Frontier
Sat 5/27:00 am
SJU
-
BWI
1 stop13h 51m
Frontier
Deal found 4/6$186
This Expedia deal was found by Cheapflights users on 4/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/53:26 pm
BWI
-
SJU
1 stop10h 42m
Multiple Airlines
Mon 5/112:09 am
SJU
-
BWI
Nonstop3h 56m
Multiple Airlines
Deal found 4/5$188
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Wed 4/296:20 am
BWI
-
SJU
Nonstop3h 44m
Multiple Airlines
Fri 5/17:15 am
SJU
-
BWI
1 stop8h 14m
Multiple Airlines
Deal found 4/6$189
This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:40 pm
BWI
-
SJU
Nonstop3h 50m
Frontier
Tue 4/283:08 am
SJU
-
BWI
1 stop13h 32m
Frontier
Deal found 4/6$190
This Expedia deal was found by Cheapflights users on 4/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/107:38 pm
BWI
-
SJU
Nonstop3h 50m
Frontier
Mon 4/201:42 pm
SJU
-
BWI
Nonstop4h 12m
Frontier
Deal found 4/6$191
This Expedia deal was found by Cheapflights users on 4/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:35 pm
BWI
-
SJU
1 stop8h 26m
Multiple Airlines
Fri 4/2412:57 pm
SJU
-
BWI
1 stop9h 23m
Multiple Airlines
Deal found 4/6$192
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:39 pm
BWI
-
SJU
1 stop12h 14m
Spirit Airlines
Thu 4/168:09 pm
SJU
-
BWI
Nonstop3h 50m
Spirit Airlines
Deal found 4/6$193
This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/279:59 pm
BWI
-
SJU
1 stop11h 31m
Frontier
Sat 5/27:00 am
SJU
-
BWI
1 stop13h 51m
Frontier
Deal found 4/6$194
This Priceline deal was found by Cheapflights users on 4/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3012:23 pm
IAD
-
SJU
1 stop10h 33m
Frontier
Mon 5/43:19 pm
SJU
-
IAD
1 stop26h 33m
Frontier
Deal found 4/6$212

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 April 10, 2026.

Round-trip from

$182
(Frontier)

One-way from

$88
(Frontier)

Popular in

March

Cheapest in

July

Average price

$335
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. 5% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 10, 2026.
Use the filters below to find and compare flights from Washington, D.C. to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Tue 4/28

11:08 am-11:50 pm

2 stops12h 42m

San Juan Luis Munoz Marin Intl

Wed 4/29

1:00 am-2:14 pm

2 stops13h 14m

$342

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Sat 5/2

9:00 am-8:24 pm

1 stop11h 24m

San Juan Luis Munoz Marin Intl

Wed 5/6

2:03 pm-10:50 pm

1 stop8h 47m

$342

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Mon 6/8

5:00 pm-11:43 pm

1 stop6h 43m

San Juan Luis Munoz Marin Intl

Tue 6/16

12:54 pm-10:47 pm

1 stop9h 53m

$342

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Wed 4/22

10:10 am-8:34 pm

1 stop10h 24m

San Juan Luis Munoz Marin Intl

Sun 4/26

7:20 am-11:21 am

Nonstop4h 01m

$358

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 5/30

10:43 am-8:30 pm

1 stop9h 47m

San Juan Luis Munoz Marin Intl

Wed 6/10

5:56 pm-12:44 am

1 stop6h 48m

$362

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Wed 5/6

11:55 am-8:34 pm

1 stop8h 39m

San Juan Luis Munoz Marin Intl

Mon 5/11

1:00 am-9:30 am

1 stop8h 30m

$362

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 5/18

6:08 am-4:33 pm

1 stop10h 25m

San Juan Luis Munoz Marin Intl

Fri 5/22

6:15 am-4:36 pm

1 stop10h 21m

$362

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Sat 5/9

3:00 pm-11:50 pm

1 stop8h 50m

San Juan Luis Munoz Marin Intl

Mon 5/11

1:00 am-1:00 pm

2 stops12h 00m

$362

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Sun 5/31

6:09 am-4:29 pm

1 stop10h 20m

San Juan Luis Munoz Marin Intl

Wed 6/3

2:35 pm-10:59 pm

1 stop8h 24m

$362

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Wed 6/17

7:28 pm-5:29 am

1 stop10h 01m

San Juan Luis Munoz Marin Intl

Sat 6/20

1:00 am-7:46 am

1 stop6h 46m

$380

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 60 resultsSorted by cheapest first
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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 April 10, 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 57 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 April 10, 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 25% 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 April 4, 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 April 10, 2026.

The most flights from WAS to PR1 are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, 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 19% of weekly flights between Washington, D.C. and San Juan have experienced delays in the past year, with the average delay time being 135 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, United Airlines have had the lowest number of delays on this route, with just 17% 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 April 10, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to San Juan, such as Southwest,United Airlines, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,335 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,562 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
JetBlue
7.2
Good
2,928 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Spirit Airlines
6.3
Okay
8,607 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
2,997 reviews
Southwest
8.0
Very good
4,335 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 1568 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 Spirit Airlines. Our recent data shows that you can find tickets from as low as $88 on this airline. Additional options worth looking into are Frontier and Delta, starting at $88 and $136 round-trip. Spirit Airlines is currently priced 74% 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 $59. 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 United Airlines (88%), Air Canada (82%) and Brussels Airlines (73%).

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

    The cheapest flight price from Washington, D.C. to San Juan is $138. On average you can expect to pay $854. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $194.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington, D.C. to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Luis Munoz Marin Intl flights
Reagan-National to Luis Munoz Marin Intl flights
Dulles Intl to Aguadilla flights
Reagan-National to Ponce flights

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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$88Average$268FlexibilityNo cancel feeOn-time65%
FrontierCheapest$88Average$332FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$379FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$146Average$411FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$172Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$220Average$464FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$225Average$434FlexibilityNo cancel feeOn-time71%

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