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$130+ 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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SJU
Aug 12 — Aug 191
Wed 8/12
Wed 8/19
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to San Juan are usually found in October or February, booked 48 days in advance, depart on a Sunday or Monday 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 July 13, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/10. 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.
Mon 8/174:19 pm
BWI
-
SJU
1 stop8h 04m
Frontier
Mon 8/312:14 pm
SJU
-
BWI
Nonstop4h 09m
Frontier
Deal found 7/10$277
This Kiwi.com deal was found by Cheapflights users on 7/10. 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.
Mon 8/174:19 pm
BWI
-
SJU
1 stop8h 04m
Frontier
Sat 8/292:14 pm
SJU
-
BWI
Nonstop4h 09m
Frontier
Deal found 7/10$278
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:09 am
BWI
-
SJU
1 stop8h 43m
Frontier
Fri 8/282:14 pm
SJU
-
BWI
Nonstop4h 09m
Frontier
Deal found 7/12$279
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:35 pm
BWI
-
SJU
Nonstop4h 05m
Frontier
Sun 8/302:14 pm
SJU
-
BWI
Nonstop4h 09m
Frontier
Deal found 7/9$280
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:27 pm
BWI
-
SJU
1 stop29h 01m
Frontier
Sat 7/187:34 am
SJU
-
BWI
Nonstop4h 06m
Frontier
Deal found 7/12$281
This Super.com deal was found by Cheapflights users on 7/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:35 pm
BWI
-
SJU
Nonstop4h 05m
Frontier
Fri 8/147:34 am
SJU
-
BWI
Nonstop4h 06m
Frontier
Deal found 7/8$282
This Frontier deal was found by Cheapflights users on 7/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:35 pm
BWI
-
SJU
Nonstop4h 05m
Frontier
Sat 8/222:14 pm
SJU
-
BWI
Nonstop4h 09m
Frontier
Deal found 7/10$283
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Tue 8/1112:35 pm
BWI
-
SJU
Nonstop4h 05m
Frontier
Thu 8/1310:48 pm
SJU
-
BWI
1 stop10h 06m
Frontier
Deal found 7/9$284
This Priceline deal was found by Cheapflights users on 7/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1312:35 pm
BWI
-
SJU
Nonstop4h 05m
Frontier
Wed 7/157:34 am
SJU
-
BWI
Nonstop4h 06m
Frontier
Deal found 7/11$285
This Frontier deal was found by Cheapflights users on 7/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:35 pm
BWI
-
SJU
Nonstop4h 05m
Frontier
Sun 8/232:14 pm
SJU
-
BWI
Nonstop4h 09m
Frontier
Deal found 7/12$287
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Sat 8/87:27 pm
BWI
-
SJU
1 stop29h 01m
Frontier
Sat 8/156:26 am
SJU
-
BWI
2 stops25h 00m
Frontier
Deal found 7/9$288
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Mon 8/36:09 pm
IAD
-
SJU
1 stop21h 56m
Frontier
Thu 8/69:02 am
SJU
-
IAD
2 stops13h 50m
Frontier
Deal found 7/9$312

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 July 13, 2026.

Round-trip from

$277
(Kiwi.com)

One-way from

$130
(Super.com)

Popular in

June

Cheapest in

October

Average price

$425
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. 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).
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Average for round-trip flights in July 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 July 13, 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

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Tue 8/25

6:00 am-1:35 pm

1 stop7h 35m

San Juan Luis Munoz Marin Intl

Tue 9/1

8:20 am-6:25 pm

2 stops10h 05m

$316

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Sat 8/22

8:15 am-6:05 pm

2 stops9h 50m

San Juan Luis Munoz Marin Intl

Mon 8/31

5:45 pm-11:55 pm

1 stop6h 10m

$331

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Fri 10/30

4:10 pm-10:09 pm

1 stop5h 59m

San Juan Luis Munoz Marin Intl

Wed 11/4

2:59 pm-8:59 pm

1 stop7h 00m

$332

Washington, D.C.San Juan

DCA - SJU

DCASJU

Washington, D.C. Reagan-National

Mon 8/24

6:55 pm-2:06 am

1 stop7h 11m

San Juan Luis Munoz Marin Intl

Thu 8/27

5:39 pm-9:31 pm

Nonstop3h 52m

$344

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Fri 8/28

11:55 am-8:05 pm

2 stops8h 10m

San Juan Luis Munoz Marin Intl

Wed 9/2

5:15 am-1:15 pm

2 stops8h 00m

$345

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Wed 9/16

8:10 am-4:25 pm

2 stops8h 15m

San Juan Luis Munoz Marin Intl

Sat 9/19

5:05 am-1:35 pm

2 stops8h 30m

$345

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Thu 10/1

3:55 pm-1:20 am

2 stops9h 25m

San Juan Luis Munoz Marin Intl

Sun 10/4

6:00 am-3:05 pm

2 stops9h 05m

$345

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Sat 8/29

11:10 am-6:15 pm

1 stop7h 05m

San Juan Luis Munoz Marin Intl

Sun 8/30

5:00 am-11:55 am

2 stops6h 55m

$345

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Fri 9/4

4:15 pm-11:50 pm

1 stop7h 35m

San Juan Luis Munoz Marin Intl

Sun 9/6

5:20 am-1:40 pm

2 stops8h 20m

$350

BaltimoreSan Juan

BWI - SJU

BWISJU

Baltimore/Washington

Fri 12/4

8:00 pm-10:00 am

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Mon 12/7

6:15 am-11:30 am

1 stop6h 15m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

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

What is the cheapest month to book a flight from Washington, D.C. to San Juan?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to San Juan (average of $315). Flying from Washington, D.C. to San Juan in September is currently the most expensive (average of $511). 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 July 13, 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 32% on your trip compared to booking a flight in the morning.

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 July 13, 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 20% of weekly flights between Washington, D.C. and San Juan have experienced delays in the past year, with the average delay time being 134 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 Thursday 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.

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

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 30 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 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 July 11, 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.

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 July 13, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to San Juan, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
8.0
Very good
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
United Airlines
7.4
Good
9,981 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.1
Good
11,815 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
JetBlue
7.1
Good
3,011 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Frontier
5.6
Fair
2,821 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

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 50m. 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 $90 on this airline. Additional options worth looking into are Delta and JetBlue, starting at $136 and $161 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 Frontier, which is currently one of the cheapest options available, starting at $54. Delta flights start at $68 while deals on Southwest start at $78 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 (91%), United Airlines (91%) and Brussels Airlines (87%).

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

    The cheapest flight price from Washington, D.C. to San Juan is $178. On average you can expect to pay $844. The most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $272.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. to San Juan (average of $315). Flying from Washington, D.C. to San Juan in September is currently the most expensive (average of $511). 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
Reagan-National to Ponce flights
Dulles Intl to Aguadilla flights

Top 6 airlines flying from Washington, D.C. to San Juan

Discover the top 6 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 July 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$355FlexibilityNo cancel feeOn-time62%
DeltaCheapest$135Average$520FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$146Average$444FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$172Average$469FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$220Average$470FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$225Average$409FlexibilityNo cancel feeOn-time71%

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