HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Juan

$163+ Cheap flights from Washington 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to San Juan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to San Juan

Keep the following information in mind while searching for Washington to San Juan flight deals. Data was last updated September 16, 2025.

Round-trip from

$363
(Delta)

One-way from

$163
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$507
From Washington to San Juan
Search Deals
One-way flight from Washington to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Washington to San Juan

Cheapest flights from Washington to San Juan
Explore the most affordable flight options available from Washington to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2511:24 pmSEA - SJU
1 stop11h 56mAmerican Airlines
Wed 11/56:00 amSJU - SEA
2 stops13h 31mAmerican Airlines
Deal found 9/14$363
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/611:24 pmSEA - SJU
2 stops13h 30mAmerican Airlines
Wed 10/223:00 pmSJU - SEA
1 stop21h 49mAmerican Airlines
Deal found 9/15$364
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1711:40 pmSEA - SJU
1 stop18h 44mJetBlue
Fri 10/246:00 amSJU - SEA
1 stop19h 36mJetBlue
Deal found 9/16$370
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 11/45:30 amSEA - SJU
2 stops12h 52mUnited Airlines
Thu 11/202:25 pmSJU - SEA
1 stop12h 45mUnited Airlines
Deal found 9/15$373
This Frontier deal was found by Cheapflights users on 9/13. 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.
Thu 11/1312:52 pmPDX - SJU
2 stops23h 18mFrontier
Sun 11/162:11 amSJU - PDX
2 stops13h 45mFrontier
Deal found 9/13$373
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/2510:54 pmSEA - SJU
1 stop9h 55mUnited Airlines
Fri 10/311:05 amSJU - SEA
2 stops15h 49mUnited Airlines
Deal found 9/15$375
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/127:00 amSEA - SJU
1 stop10h 00mUnited Airlines
Fri 11/142:05 amSJU - SEA
1 stop13h 06mUnited Airlines
Deal found 9/16$377
This Priceline deal was found by Cheapflights users on 9/15. 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.
Sat 10/1111:40 pmSEA - SJU
1 stop22h 17mJetBlue
Thu 10/161:25 pmSJU - SEA
1 stop12h 11mJetBlue
Deal found 9/15$382
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:40 pmSEA - SJU
1 stop12h 16mJetBlue
Mon 10/63:03 amSJU - SEA
1 stop22h 33mJetBlue
Deal found 9/15$384
This Frontier deal was found by Cheapflights users on 9/15. 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 10/3012:52 pmPDX - SJU
2 stops24h 18mFrontier
Wed 11/51:59 amSJU - PDX
2 stops13h 57mFrontier
Deal found 9/15$384
This JetBlue deal was found by Cheapflights users on 9/13. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:59 pmSEA - SJU
1 stop13h 44mJetBlue
Fri 10/31:29 pmSJU - SEA
1 stop11h 55mJetBlue
Deal found 9/13$385
This Priceline deal was found by Cheapflights users on 9/15. 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 9/2911:59 pmSEA - SJU
1 stop13h 44mJetBlue
Thu 10/21:29 pmSJU - SEA
1 stop11h 55mJetBlue
Deal found 9/15$389

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 16, 2025.
Use the filters below to find and compare flights from Washington to San Juan that are best for you.

Fly from

Washington

Fly to

San Juan

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/23

7:00 am-9:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

Thu 2/26

2:05 am-11:20 am

1 stop13h 15m

$363

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 11/4

5:30 am-10:22 pm

2 stops12h 52m

San Juan Luis Munoz Marin Intl

Wed 11/19

2:05 am-11:11 am

1 stop13h 06m

$373

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 9/27

11:59 pm-4:43 pm

1 stop13h 44m

San Juan Luis Munoz Marin Intl

Sat 10/4

1:29 pm-10:24 pm

1 stop11h 55m

$384

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Fri 11/7

5:25 pm-3:11 pm

2 stops17h 46m

San Juan Luis Munoz Marin Intl

Fri 11/14

3:20 pm-10:05 pm

1 stop10h 45m

$419

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Thu 10/30

6:00 am-9:59 pm

1 stop12h 59m

San Juan Luis Munoz Marin Intl

Thu 11/6

7:15 am-1:00 pm

1 stop9h 45m

$419

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Sat 12/6

11:59 pm-3:40 pm

1 stop11h 41m

San Juan Luis Munoz Marin Intl

Fri 12/12

2:25 pm-9:15 pm

1 stop10h 50m

$419

SpokaneSan Juan

GEG - SJU

GEGSJU

Spokane

Mon 10/13

7:05 pm-11:56 am

2 stops13h 51m

San Juan Luis Munoz Marin Intl

Thu 10/30

7:00 am-10:48 pm

2 stops18h 48m

$431

SpokaneSan Juan

GEG - SJU

GEGSJU

Spokane

Sat 1/24

3:05 pm-1:07 pm

2 stops18h 02m

San Juan Luis Munoz Marin Intl

Mon 2/2

2:12 pm-12:20 am

2 stops14h 08m

$431

SpokaneSan Juan

GEG - SJU

GEGSJU

Spokane

Tue 1/20

3:05 pm-1:07 pm

2 stops18h 02m

San Juan Luis Munoz Marin Intl

Tue 1/27

3:21 pm-11:44 pm

2 stops12h 23m

$431

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/23

6:35 am-12:05 am

2 stops13h 30m

San Juan Luis Munoz Marin Intl

Thu 3/5

3:50 pm-12:30 am

2 stops12h 40m

$437

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 50 results
1
2
3
...
5

Best time to book a flight from Washington to San Juan

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

What is the cheapest month to book a flight from State of Washington to San Juan?

Currently, September is the cheapest month in which you can book a flight from State of Washington to San Juan (average of $254). Flying from State of Washington 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 WA to SJU?

Find hourly flight availability from Washington 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 16, 2025.

When flying from State of Washington to San Juan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Washington 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 State of Washington to San Juan?

    United Airlines, JetBlue, and Delta can get you from State of Washington to San Juan in just under 10h. Your travel time can differ by up to 7h 46m. The distance between State of Washington and San Juan is about 3723 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to San Juan one-way?

    The cheapest airlines for a one-way flight from State of Washington to San Juan are JetBlue ($163), Delta ($210), and American Airlines ($216).

  • What are the most popular routes from State of Washington to San Juan?

    The most popular route from State of Washington to San Juan is Seattle/Tacoma Intl - San Juan Luis Munoz Marin Intl. You may also consider Portland - San Juan Luis Munoz Marin Intl or Spokane - San Juan Luis Munoz Marin Intl.

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

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

  • How can I find direct flights from Washington 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 to San Juan.

  • Can I find deals for business class flights from Washington to San Juan?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to San Juan?

    Currently, September is the cheapest month in which you can book a flight from State of Washington to San Juan (average of $254). Flying from State of Washington 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Luis Munoz Marin Intl flights
John F Kennedy Intl to Luis Munoz Marin Intl flights
LaGuardia to Luis Munoz Marin Intl flights
Dulles Intl to Luis Munoz Marin Intl flights
Boston to Luis Munoz Marin Intl flights
Orlando to Luis Munoz Marin Intl flights
Baltimore to Luis Munoz Marin Intl flights
Atlanta to Luis Munoz Marin Intl flights
O'Hare Intl to Luis Munoz Marin Intl flights
Reagan-National to Luis Munoz Marin Intl flights
Philadelphia to Luis Munoz Marin Intl flights
Dallas/Fort Worth to Luis Munoz Marin Intl flights
Hartford to Luis Munoz Marin Intl flights
Hobby to Luis Munoz Marin Intl flights
Fort Lauderdale to Luis Munoz Marin Intl flights
Tampa to Luis Munoz Marin Intl flights
Raleigh to Luis Munoz Marin Intl flights
George Bush Intcntl to Luis Munoz Marin Intl flights
Minneapolis to Luis Munoz Marin Intl flights
Miami to Luis Munoz Marin Intl flights
Detroit to Luis Munoz Marin Intl flights
Midway to Luis Munoz Marin Intl flights
Charlotte to Luis Munoz Marin Intl flights
Denver to Luis Munoz Marin Intl flights
Los Angeles to Luis Munoz Marin Intl flights
Seattle to Luis Munoz Marin Intl flights
John F Kennedy Intl to Aguadilla flights
Cleveland to Luis Munoz Marin Intl flights
San Francisco to Luis Munoz Marin Intl flights
Providence to Luis Munoz Marin Intl flights
Atlantic City to Luis Munoz Marin Intl flights
Orlando to Ponce flights
Sky Harbor Intl to Luis Munoz Marin Intl flights
Austin to Luis Munoz Marin Intl flights
Indianapolis to Luis Munoz Marin Intl flights
Orlando to Aguadilla flights
White Plains to Luis Munoz Marin Intl flights
Cincinnati to Luis Munoz Marin Intl flights
Milwaukee to Luis Munoz Marin Intl flights
John F Kennedy Intl to Ponce flights
Love Field to Luis Munoz Marin Intl flights
Trenton to Luis Munoz Marin Intl flights
Norfolk to Luis Munoz Marin Intl flights
Kansas City to Luis Munoz Marin Intl flights
Columbus to Luis Munoz Marin Intl flights
San Antonio to Luis Munoz Marin Intl flights
Jacksonville to Luis Munoz Marin Intl flights
San Diego to Luis Munoz Marin Intl flights
Salt Lake City to Luis Munoz Marin Intl flights
Pittsburgh to Luis Munoz Marin Intl flights

Top 9 airlines flying from Washington to San Juan

Discover the top 9 airlines that operate flights from Washington 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$194Average$796FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$233Average$341FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$307Average$740FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$326Average$563FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$355Average$680FlexibilityNo cancel feeOn-time71%
DeltaCheapest$359Average$615FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$447Average$812FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$494Average$688FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$678Average$880FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.