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$85+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SJU
Oct 10 — Oct 171
Fri 10/10
Fri 10/17
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 March, booked 51 days in advance, depart on a Tuesday or Sunday and return on a Thursday

Cheap 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 September 10, 2025.

Round-trip from

$166
(Cheapflightsfares)

One-way from

$85
(Cheapflightsfares)

Popular in

December

Cheapest in

July

Average price

$316
From Washington, D.C. (WAS) to San Juan
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One-way flight from Washington, D.C. (WAS) to San Juan
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Highest demand for flights based on searches. 12% potential increase in price ($46 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 September 2025
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Find 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 September 10, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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.
Thu 11/137:26 pmIAD - SJU
Nonstop3h 52mFrontier
Sat 11/224:05 pmSJU - IAD
Nonstop4h 03mFrontier
Deal found 9/9$166
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Thu 10/28:42 pmBWI - SJU
Nonstop4h 01mSpirit Airlines
Sat 10/46:44 amSJU - BWI
1 stop8h 48mSpirit Airlines
Deal found 9/9$175
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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.
Sun 12/710:08 amIAD - SJU
Nonstop3h 54mFrontier
Thu 12/116:00 amSJU - IAD
Nonstop4h 13mFrontier
Deal found 9/8$176
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Thu 9/258:42 pmBWI - SJU
Nonstop4h 01mSpirit Airlines
Sat 10/46:44 amSJU - BWI
1 stop8h 48mSpirit Airlines
Deal found 9/9$176
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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.
Thu 10/308:26 pmIAD - SJU
Nonstop3h 52mFrontier
Sun 11/23:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/8$177
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:45 amBWI - SJU
1 stop8h 38mSpirit Airlines
Sun 11/163:59 amSJU - BWI
Nonstop3h 58mSpirit Airlines
Deal found 9/10$178
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Sun 9/288:42 pmBWI - SJU
Nonstop4h 01mSpirit Airlines
Thu 10/27:05 amSJU - BWI
Nonstop4h 00mSpirit Airlines
Deal found 9/8$179
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sun 11/910:00 pmBWI - SJU
Nonstop4h 01mSpirit Airlines
Thu 11/133:59 amSJU - BWI
Nonstop3h 58mSpirit Airlines
Deal found 9/9$180
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:42 pmBWI - SJU
Nonstop4h 01mSpirit Airlines
Sat 9/276:44 amSJU - BWI
1 stop8h 48mSpirit Airlines
Deal found 9/9$181
This Frontier deal was found by Cheapflights users on 9/8. 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 10/239:07 pmIAD - SJU
Nonstop3h 52mFrontier
Thu 10/303:45 pmSJU - IAD
Nonstop3h 56mFrontier
Deal found 9/8$182
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 9/301:17 pmBWI - SJU
1 stop7h 39mSpirit Airlines
Thu 10/27:05 amSJU - BWI
Nonstop4h 00mSpirit Airlines
Deal found 9/7$182
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/28:42 pmBWI - SJU
Nonstop4h 01mSpirit Airlines
Mon 10/62:49 amSJU - BWI
1 stop9h 51mSpirit Airlines
Deal found 9/8$183

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 September 10, 2025.
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

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Tue 10/21

8:30 am-12:15 pm

Nonstop3h 45m

San Juan Luis Munoz Marin Intl

Thu 10/23

6:07 pm-9:59 pm

Nonstop3h 52m

$234

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Wed 10/15

8:30 am-12:15 pm

Nonstop3h 45m

San Juan Luis Munoz Marin Intl

Tue 10/21

6:05 pm-9:57 pm

Nonstop3h 52m

$234

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Wed 10/8

8:30 am-12:15 pm

Nonstop3h 45m

San Juan Luis Munoz Marin Intl

Tue 10/21

6:05 pm-9:57 pm

Nonstop3h 52m

$234

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Thu 10/30

5:32 pm-9:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Mon 11/3

8:10 am-5:30 pm

1 stop10h 20m

$242

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 10/20

6:15 am-1:45 pm

1 stop7h 30m

San Juan Luis Munoz Marin Intl

Fri 10/24

3:56 pm-12:21 am

1 stop8h 25m

$243

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Thu 10/30

8:00 am-11:51 am

Nonstop3h 51m

San Juan Luis Munoz Marin Intl

Tue 11/4

12:01 pm-6:59 pm

1 stop7h 58m

$246

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Tue 11/11

12:30 pm-10:04 pm

1 stop8h 34m

San Juan Luis Munoz Marin Intl

Thu 11/13

6:51 pm-9:48 pm

Nonstop3h 57m

$265

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Sat 10/4

8:30 am-12:19 pm

Nonstop3h 49m

San Juan Luis Munoz Marin Intl

Wed 10/8

1:25 pm-10:56 pm

1 stop9h 31m

$266

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Thu 10/2

5:20 pm-12:57 am

1 stop7h 37m

San Juan Luis Munoz Marin Intl

Thu 10/9

6:07 pm-9:59 pm

Nonstop3h 52m

$267

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Sat 10/18

3:00 pm-11:41 pm

1 stop8h 41m

San Juan Luis Munoz Marin Intl

Fri 10/24

6:05 pm-9:57 pm

Nonstop3h 52m

$268

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 55 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 August 29, 2025.

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 51 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, September is the cheapest month in which you can book a flight from Washington, D.C. to San Juan (average of $254). Flying from Washington, D.C. to San Juan 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 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 September 10, 2025.

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 61% on your trip compared to booking a flight in the evening.

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 December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. to San Juan flight should consider departing on Thursday evenings when fares are most often at their lowest. Tuesday evenings 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 September 10, 2025.

The most flights from WAS to PR1 are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

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

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 September 10, 2025.
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
4,249 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,249 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
JetBlue
7.2
Good
2,913 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,024 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,181 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 3h 45m. There are 1557 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 $85 on this airline. Additional options worth looking into are Spirit Airlines and American Airlines, starting at $115 and $145 round-trip. Frontier is currently priced 75% 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 Spirit Airlines, which is currently one of the cheapest options available, starting at $93. United Airlines flights start at $117 while deals on JetBlue start at $117 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 Air Canada (72%), United Airlines (72%) and Brussels Airlines (64%).

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

    The cheapest flight price from Washington, D.C. to San Juan is $75. On average you can expect to pay $589. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $198.

  • Where are the most common layover locations when flying from Washington, D.C. to San Juan?

    Washington, D.C. to San Juan flights have a layover in Orlando most of the time.

  • What are some popular things to do or see while on a layover in Orlando?

    Most Orlando visitors opt to spend their time experiencing Walt Disney World Resort, Universal Orlando Resort, and International Drive. Walt Disney World Resort, Universal Orlando Resort, and International Drive are located about 16.2 mi, 10.2 mi, and 9.9 mi, respectively from Orlando. Travelers in need of a car in Orlando can rent one for about $28 per day.

  • Where are the least popular layover locations for Washington, D.C. to San Juan flights?

    Flights departing from Washington, D.C. and landing in San Juan layover in Fort Lauderdale least frequently.

  • 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, September is the cheapest month in which you can book a flight from Washington, D.C. to San Juan (average of $254). Flying from Washington, D.C. to San Juan 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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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 September 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$255FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$267FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$145Average$463FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$168Average$401FlexibilityNo cancel feeOn-time62%
DeltaCheapest$172Average$387FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$199Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$220Average$466FlexibilityNo cancel feeOn-time63%

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