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San Juan

$113+ 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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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 November 4, 2025.

Round-trip from

$393
(Kiwi.com)

One-way from

$113
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$571
From Washington to San Juan
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One-way flight from Washington to San Juan
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Highest demand for flights based on searches. 5% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 4, 2025.

This Southwest deal was found by Cheapflights users on 11/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:30 amPDX - SJU
2 stops13h 45mSouthwest
Sat 12/66:15 amSJU - PDX
2 stops14h 15mSouthwest
Deal found 11/2$375
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/1112:51 pmPDX - SJU
2 stops31h 05mMultiple Airlines
Fri 12/192:52 pmSJU - PDX
1 stop12h 01mMultiple Airlines
Deal found 11/2$381
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/1112:51 pmPDX - SJU
2 stops31h 05mMultiple Airlines
Thu 12/185:14 pmSJU - PDX
1 stop28h 00mMultiple Airlines
Deal found 11/3$393
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/612:48 pmSEA - SJU
2 stops30h 37mMultiple Airlines
Fri 12/192:52 pmSJU - SEA
1 stop11h 56mMultiple Airlines
Deal found 11/3$418
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 11/191:37 pmSEA - SJU
2 stops17h 50mMultiple Airlines
Tue 11/256:00 amSJU - SEA
1 stop30h 22mMultiple Airlines
Deal found 11/3$419
This Delta deal was found by Cheapflights users on 11/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:30 amPDX - SJU
2 stops14h 29mDelta
Wed 12/173:10 pmSJU - PDX
1 stop11h 00mDelta
Deal found 11/2$419
This eDestinos deal was found by Cheapflights users on 11/4. 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.
Thu 12/48:45 amSEA - SJU
1 stop21h 47mMultiple Airlines
Mon 12/87:10 amSJU - SEA
2 stops35h 28mMultiple Airlines
Deal found 11/4$420
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/1112:51 pmPDX - SJU
2 stops31h 05mMultiple Airlines
Sun 12/213:14 pmSJU - PDX
1 stop30h 00mMultiple Airlines
Deal found 11/2$426
This Southwest deal was found by Cheapflights users on 11/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/76:35 amSEA - SJU
2 stops11h 45mSouthwest
Sat 12/138:20 amSJU - SEA
2 stops16h 00mSouthwest
Deal found 11/4$429
This Southwest deal was found by Cheapflights users on 11/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:15 amPDX - SJU
2 stops11h 50mSouthwest
Thu 12/186:40 amSJU - PDX
2 stops12h 25mSouthwest
Deal found 11/3$435
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/3011:59 pmSEA - SJU
1 stop12h 37mUnited Airlines
Tue 1/138:35 amSJU - SEA
1 stop13h 39mUnited Airlines
Deal found 11/2$438
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 11/249:12 amSEA - SJU
1 stop10h 43mMultiple Airlines
Wed 11/266:01 amSJU - SEA
2 stops33h 55mMultiple Airlines
Deal found 11/3$439

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 November 4, 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

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Tue 12/9

5:30 am-11:59 pm

2 stops14h 29m

San Juan Luis Munoz Marin Intl

Wed 12/17

3:10 pm-10:10 pm

1 stop11h 00m

$419

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Sat 12/6

8:30 am-12:36 am

2 stops12h 06m

San Juan Luis Munoz Marin Intl

Tue 12/16

8:10 am-6:06 pm

2 stops13h 56m

$419

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Fri 1/23

7:00 am-11:44 pm

1 stop12h 44m

San Juan Luis Munoz Marin Intl

Wed 1/28

7:00 am-8:32 pm

2 stops17h 32m

$419

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Mon 1/19

7:37 pm-2:10 pm

2 stops14h 33m

San Juan Luis Munoz Marin Intl

Wed 1/28

7:30 am-6:50 pm

2 stops15h 20m

$419

SpokaneSan Juan

GEG - SJU

GEGSJU

Spokane

Sat 1/24

6:00 am-11:59 pm

2 stops13h 59m

San Juan Luis Munoz Marin Intl

Mon 2/2

6:00 am-6:49 pm

2 stops16h 49m

$425

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 1/12

12:35 pm-4:36 pm

2 stops24h 01m

San Juan Luis Munoz Marin Intl

Tue 1/27

2:05 am-9:12 pm

2 stops23h 07m

$433

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Tue 12/2

6:15 am-10:05 pm

2 stops11h 50m

San Juan Luis Munoz Marin Intl

Tue 12/9

2:05 pm-10:35 pm

2 stops12h 30m

$435

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 12/6

5:00 am-9:00 pm

2 stops12h 00m

San Juan Luis Munoz Marin Intl

Tue 12/9

2:05 am-11:16 am

1 stop13h 11m

$440

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 2/21

9:19 am-12:49 pm

2 stops23h 30m

San Juan Luis Munoz Marin Intl

Fri 3/6

2:05 am-11:23 am

1 stop13h 18m

$443

PortlandSan Juan

PDX - SJU

PDXSJU

Portland

Fri 1/23

11:05 pm-12:55 pm

1 stop9h 50m

San Juan Luis Munoz Marin Intl

Thu 1/29

2:05 am-2:46 pm

2 stops16h 41m

$447

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 55 results
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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, January is the cheapest month in which you can book a flight from State of Washington to San Juan (average of $234). Flying from State of Washington to San Juan in July is currently the most expensive (average of $454). 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 November 4, 2025.

It’s typically best to fly out from State of Washington to San Juan at noon. Doing so could potentially save you 37% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from State of Washington to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Washington to San Juan. Price data was last updated on December 16, 2024.

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

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?

    Delta, United Airlines, and American Airlines can get you from State of Washington to San Juan in just under 12h 06m. Your travel time can differ by up to 2h 23m. The distance between State of Washington and San Juan is about 3710 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 Frontier ($138), Delta ($182), and Southwest ($188).

  • 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, January is the cheapest month in which you can book a flight from State of Washington to San Juan (average of $234). Flying from State of Washington to San Juan in July is currently the most expensive (average of $454). 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 to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
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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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$175Average$698FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$218Average$341FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$296Average$722FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$327Average$556FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$352Average$683FlexibilityNo cancel feeOn-time71%
DeltaCheapest$357Average$570FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$447Average$810FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$470Average$690FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$678Average$880FlexibilityNo cancel feeOn-time75%

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