$127+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Jan 17 — Jan 241
1 adult, Economy
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Cheapest flights from Washington to San JuanExplore 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 Dezember 18, 2025.
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 Dezember 18, 2025.
This Delta deal was found by Cheapflights users on 12/17. 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.
Mi 12/318:15 amSEA - SJU
1 stop11h 05mDelta
Sa 1/102:19 pmSJU - SEA
1 stop12h 06mDelta
Deal found 12/17![Delta logo]()
$637
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Sa 12/201:47 pmGEG - SJU
2 stops12h 24mUnited Airlines
Di 3/317:20 amSJU - GEG
2 stops16h 36mUnited Airlines
Deal found 12/16![United Airlines logo]()
$664
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 12/2011:59 pmGEG - SJU
1 stop19h 23mAmerican Airlines
Di 3/316:00 amSJU - GEG
2 stops13h 54mAmerican Airlines
Deal found 12/16![American Airlines logo]()
$698
This eDestinos deal was found by Cheapflights users on 12/16. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 12/249:20 pmSEA - SJU
1 stop31h 19mMultiple Airlines
Mo 12/293:54 amSJU - SEA
3 stops60h 36mMultiple Airlines
Deal found 12/16![Multiple Airlines logo]()
$702
This eDestinos deal was found by Cheapflights users on 12/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fr 12/198:45 pmPDX - SJU
3 stops25h 54mMultiple Airlines
Sa 1/107:11 pmSJU - PDX
3 stops46h 37mMultiple Airlines
Deal found 12/15![Multiple Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 12/17. 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.
Mo 12/2211:36 amSEA - SJU
1 stop10h 51mDelta
Mi 12/241:07 pmSJU - SEA
2 stops14h 20mDelta
Deal found 12/17![Delta logo]()
$724
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Mi 12/318:00 amSEA - SJU
2 stops18h 11mUnited Airlines
Fr 1/92:05 amSJU - SEA
1 stop13h 01mUnited Airlines
Deal found 12/16![United Airlines logo]()
$727
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 12/3110:49 pmPDX - SJU
1 stop18h 22mAmerican Airlines
Di 1/61:31 pmSJU - PDX
1 stop14h 15mAmerican Airlines
Deal found 12/16![American Airlines logo]()
$745
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Fr 12/265:00 amSEA - SJU
2 stops15h 36mUnited Airlines
Fr 1/92:05 amSJU - SEA
1 stop13h 01mUnited Airlines
Deal found 12/17![United Airlines logo]()
$755
This Southwest deal was found by Cheapflights users on 12/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 12/315:00 amPDX - SJU
2 stops13h 05mSouthwest
Di 1/66:10 amSJU - PDX
2 stops13h 30mSouthwest
Deal found 12/16![Southwest logo]()
$755
This Delta deal was found by Cheapflights users on 12/17. 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.
So 12/2111:36 amSEA - SJU
1 stop10h 51mDelta
Mi 12/244:45 pmSJU - SEA
1 stop10h 46mDelta
Deal found 12/17![Delta logo]()
$764
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Mi 12/241:43 pmSEA - SJU
1 stop12h 28mUnited Airlines
Do 12/252:25 pmSJU - SEA
1 stop12h 47mUnited Airlines
Deal found 12/17![United Airlines logo]()
$768
Find 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 Dezember 18, 2025.
Round-trip from | $363 (Delta) |
|---|---|
One-way from | $127 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $804 |
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 Dezember 18, 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
Sa 2/21
2:20 pm-6:11 am
1 stop11h 51m
San Juan Luis Munoz Marin Intl
Mi 2/25
8:35 am-6:03 pm
2 stops13h 28m
$363
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Do 2/19
6:05 am-11:58 pm
1 stop13h 53m
San Juan Luis Munoz Marin Intl
Mi 2/25
7:00 am-8:46 pm
2 stops17h 46m
$363
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mi 2/18
7:15 am-11:30 pm
1 stop12h 15m
San Juan Luis Munoz Marin Intl
Mi 3/4
7:30 am-4:02 pm
1 stop12h 32m
$363
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mo 1/12
9:55 pm-1:05 pm
1 stop11h 10m
San Juan Luis Munoz Marin Intl
Mi 1/28
7:00 am-8:46 pm
2 stops17h 46m
$363
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
So 2/22
11:35 pm-2:40 pm
1 stop11h 05m
San Juan Luis Munoz Marin Intl
Mi 3/4
8:10 am-7:03 pm
2 stops14h 53m
$363
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Do 2/19
6:05 am-11:58 pm
1 stop13h 53m
San Juan Luis Munoz Marin Intl
Do 2/26
2:15 pm-11:12 pm
1 stop12h 57m
$363
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Do 2/19
6:05 am-11:58 pm
1 stop13h 53m
San Juan Luis Munoz Marin Intl
Fr 2/27
2:16 pm-10:22 pm
1 stop12h 06m
$363
PortlandSan Juan
PDX - SJU
PDXSJU
Portland
So 2/1
6:22 pm-10:48 am
2 stops12h 26m
San Juan Luis Munoz Marin Intl
Do 3/12
3:03 pm-12:50 am
1 stop12h 47m
$419
PortlandSan Juan
PDX - SJU
PDXSJU
Portland
Mi 4/29
11:10 pm-1:45 pm
1 stop11h 35m
San Juan Luis Munoz Marin Intl
Fr 5/8
1:00 am-11:35 am
2 stops13h 35m
$419
PortlandSan Juan
PDX - SJU
PDXSJU
Portland
Fr 3/6
10:55 pm-9:33 pm
1 stop18h 38m
San Juan Luis Munoz Marin Intl
Fr 3/13
3:36 pm-11:44 pm
1 stop11h 08m
$419
Showing 1-10 of 60 results
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 $231). 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 Dezember 18, 2025.
It’s typically best to fly out from State of Washington to San Juan at noon. Doing so could potentially save you 28% on the flight price compared to flying in the morning, 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.
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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.
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 Dezember 18, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$476 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$214 | Average$341 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$327 | Average$544 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$357 | Average$553 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$363 | Average$683 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$363 | Average$714 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$494 | Average$690 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$544 | Average$828 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$678 | Average$880 | FlexibilityNo cancel fee | On-time75% |