$190+ Cheap flights from Seattle (SEA) 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Sep 1 — Sep 81
Round-trip
1 adult, Economy
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Find cheap flights from Seattle 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
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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 Seattle to San Juan
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Cheapest flights from Seattle to San JuanExplore the most affordable flight options available from Seattle to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.
Explore the most affordable flight options available from Seattle to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/95:02 pm
SEA
- SJU
2 stops13h 22m
American Airlines
Wed 9/166:00 am
SJU
- SEA
2 stops16h 48m
American Airlines
Deal found 7/30![American Airlines logo]()
$441
This Southwest deal was found by Cheapflights users on 7/29. 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 9/225:20 am
SEA
- SJU
2 stops12h 50m
Southwest
Mon 9/285:00 am
SJU
- SEA
2 stops13h 00m
Southwest
Deal found 7/29![Southwest logo]()
$451
This Southwest deal was found by Cheapflights users on 7/30. 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 9/1310:30 pm
SEA
- SJU
1 stop13h 00m
Southwest
Sat 9/2611:45 am
SJU
- SEA
2 stops14h 15m
Southwest
Deal found 7/30![Southwest logo]()
$460
This Southwest deal was found by Cheapflights users on 7/29. 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 9/155:20 am
SEA
- SJU
2 stops12h 40m
Southwest
Mon 9/215:00 am
SJU
- SEA
2 stops12h 55m
Southwest
Deal found 7/29![Southwest logo]()
$465
This American Airlines deal was found by Cheapflights users on 7/30. 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 10/1711:59 pm
SEA
- SJU
2 stops12h 02m
American Airlines
Wed 10/212:18 pm
SJU
- SEA
1 stop12h 41m
American Airlines
Deal found 7/30![American Airlines logo]()
$466
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 9/2510:45 pm
SEA
- SJU
1 stop11h 47m
American Airlines
Wed 9/302:22 pm
SJU
- SEA
1 stop11h 35m
American Airlines
Deal found 7/30![American Airlines logo]()
$471
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Sun 10/255:38 pm
SEA
- SJU
1 stop18h 45m
American Airlines
Wed 11/2510:32 am
SJU
- SEA
1 stop17h 35m
American Airlines
Deal found 7/28![American Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 7/30. 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.
Wed 8/267:10 am
SEA
- SJU
2 stops11h 50m
Southwest
Wed 9/28:20 am
SJU
- SEA
2 stops12h 35m
Southwest
Deal found 7/30![Southwest logo]()
$481
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 9/188:50 pm
SEA
- SJU
1 stop9h 34m
American Airlines
Sat 10/310:16 am
SJU
- SEA
1 stop16h 36m
American Airlines
Deal found 7/30![American Airlines logo]()
$484
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Tue 9/155:02 pm
SEA
- SJU
2 stops14h 58m
American Airlines
Tue 9/222:22 pm
SJU
- SEA
1 stop11h 35m
American Airlines
Deal found 8/1![American Airlines logo]()
$488
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/2310:45 pm
SEA
- SJU
1 stop11h 47m
American Airlines
Sat 10/34:38 pm
SJU
- SEA
1 stop10h 14m
American Airlines
Deal found 7/30![American Airlines logo]()
$489
This Southwest deal was found by Cheapflights users on 7/29. 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 8/236:50 pm
SEA
- SJU
2 stops13h 05m
Southwest
Fri 8/2810:00 am
SJU
- SEA
2 stops13h 45m
Southwest
Deal found 7/29![Southwest logo]()
$494
Best flights from Seattle to San JuanDiscover carefully curated flight deals from Seattle to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 2, 2026.
Discover carefully curated flight deals from Seattle to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 2, 2026.
This Southwest deal was found by Cheapflights users on 7/30. 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.
Fri 10/309:00 am
SEA
- SJU
2 stops13h 20m
Southwest
Tue 11/312:35 pm
SJU
- SEA
2 stops13h 40m
Southwest
Deal found 7/30![Southwest logo]()
$466
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 10/2612:20 pm
SEA
- SJU
3 stops20h 55m
United Airlines
Tue 10/272:46 pm
SJU
- SEA
1 stop11h 05m
United Airlines
Deal found 7/29![United Airlines logo]()
$579
This Southwest deal was found by Cheapflights users on 7/30. 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.
Wed 8/267:10 am
SEA
- SJU
2 stops11h 50m
Southwest
Wed 9/28:20 am
SJU
- SEA
2 stops12h 35m
Southwest
Deal found 7/30![Southwest logo]()
$481
This Southwest deal was found by Cheapflights users on 7/29. 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 8/236:50 pm
SEA
- SJU
2 stops13h 05m
Southwest
Fri 8/2810:00 am
SJU
- SEA
2 stops13h 45m
Southwest
Deal found 7/29![Southwest logo]()
$494
This Southwest deal was found by Cheapflights users on 7/28. 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.
Thu 10/2211:05 am
SEA
- SJU
2 stops11h 15m
Southwest
Fri 10/3010:10 am
SJU
- SEA
2 stops13h 25m
Southwest
Deal found 7/28![Southwest logo]()
$497
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Sun 10/258:35 pm
SEA
- SJU
2 stops16h 01m
United Airlines
Sun 11/18:25 am
SJU
- SEA
2 stops17h 25m
United Airlines
Deal found 8/1![United Airlines logo]()
$625
This Southwest deal was found by Cheapflights users on 7/31. 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 8/306:50 pm
SEA
- SJU
2 stops13h 05m
Southwest
Sun 9/66:00 am
SJU
- SEA
2 stops14h 45m
Southwest
Deal found 7/31![Southwest logo]()
$511
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Thu 9/36:15 pm
SEA
- SJU
2 stops14h 42m
United Airlines
Fri 9/111:00 am
SJU
- SEA
3 stops21h 08m
United Airlines
Deal found 8/1![United Airlines logo]()
$625
This Southwest deal was found by Cheapflights users on 7/29. 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.
Fri 8/286:15 pm
SEA
- SJU
2 stops13h 35m
Southwest
Fri 9/410:00 am
SJU
- SEA
2 stops13h 50m
Southwest
Deal found 7/29![Southwest logo]()
$521
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Thu 10/156:05 pm
SEA
- SJU
2 stops15h 29m
United Airlines
Sat 10/241:05 am
SJU
- SEA
2 stops17h 27m
United Airlines
Deal found 7/31![United Airlines logo]()
$659
This Southwest deal was found by Cheapflights users on 7/31. 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 9/67:00 pm
SEA
- SJU
2 stops11h 10m
Southwest
Thu 9/1010:00 am
SJU
- SEA
2 stops13h 50m
Southwest
Deal found 7/31![Southwest logo]()
$524
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Thu 9/101:57 pm
SEA
- SJU
2 stops19h 57m
United Airlines
Mon 9/141:00 am
SJU
- SEA
3 stops21h 08m
United Airlines
Deal found 8/1![United Airlines logo]()
$675
Last-minute flights from Seattle to San JuanDiscover last-minute flight deals from Seattle to San Juan. Data last updated August 2, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to San Juan. Data last updated August 2, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sun 8/2311:11 pm
SEA
- SJU
2 stops12h 27m
American Airlines
Sun 8/301:38 pm
SJU
- SEA
1 stop13h 53m
American Airlines
Deal found 7/30![American Airlines logo]()
$466
This Southwest deal was found by Cheapflights users on 8/2. 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.
Sun 8/2310:30 pm
SEA
- SJU
1 stop13h 00m
Southwest
Sun 9/66:00 am
SJU
- SEA
2 stops14h 45m
Southwest
Deal found 8/2![Southwest logo]()
$489
This Southwest deal was found by Cheapflights users on 7/29. 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 8/236:50 pm
SEA
- SJU
2 stops13h 05m
Southwest
Fri 8/2810:00 am
SJU
- SEA
2 stops13h 45m
Southwest
Deal found 7/29![Southwest logo]()
$494
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 8/268:21 pm
SEA
- SJU
1 stop10h 22m
American Airlines
Wed 9/27:03 am
SJU
- SEA
1 stop18h 53m
American Airlines
Deal found 7/30![American Airlines logo]()
$441
This Southwest deal was found by Cheapflights users on 7/30. 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.
Wed 8/267:10 am
SEA
- SJU
2 stops11h 50m
Southwest
Wed 9/28:20 am
SJU
- SEA
2 stops12h 35m
Southwest
Deal found 7/30![Southwest logo]()
$481
This American Airlines deal was found by Cheapflights users on 8/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:56 pm
SEA
- SJU
2 stops13h 15m
American Airlines
Fri 8/286:00 am
SJU
- SEA
2 stops13h 41m
American Airlines
Deal found 8/2![American Airlines logo]()
$499
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Thu 8/278:21 pm
SEA
- SJU
1 stop15h 17m
American Airlines
Sat 9/126:00 am
SJU
- SEA
2 stops13h 42m
American Airlines
Deal found 7/29![American Airlines logo]()
$471
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/2711:56 pm
SEA
- SJU
2 stops13h 15m
American Airlines
Mon 8/3110:33 am
SJU
- SEA
2 stops12h 37m
American Airlines
Deal found 7/30![American Airlines logo]()
$496
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Thu 8/275:50 am
SEA
- SJU
1 stop14h 25m
American Airlines
Thu 9/37:03 am
SJU
- SEA
1 stop16h 55m
American Airlines
Deal found 7/28![American Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 7/28. 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.
Fri 8/287:25 pm
SEA
- SJU
2 stops12h 25m
Southwest
Sat 9/510:25 am
SJU
- SEA
2 stops14h 05m
Southwest
Deal found 7/28![Southwest logo]()
$460
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 8/2811:16 pm
SEA
- SJU
2 stops12h 22m
American Airlines
Sun 9/612:55 am
SJU
- SEA
1 stop11h 34m
American Airlines
Deal found 7/28![American Airlines logo]()
$484
One-way flights from Seattle to San JuanSearch for one-way flight options from Seattle to San Juan. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
Search for one-way flight options from Seattle to San Juan. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/104:27 pm
SEA
- SJU
2 stops28h 31m
Frontier
Deal found 8/2![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/297:06 pm
SEA
- SJU
2 stops26h 28m
Frontier
Deal found 7/30![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/277:06 pm
SEA
- SJU
2 stops26h 50m
Frontier
Deal found 7/30![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/222:37 pm
SEA
- SJU
2 stops30h 57m
Frontier
Deal found 8/1![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/57:06 pm
SEA
- SJU
2 stops26h 28m
Frontier
Deal found 7/28![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Sat 9/124:27 pm
SEA
- SJU
2 stops38h 51m
Frontier
Deal found 8/2![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/319:29 pm
SEA
- SJU
2 stops39h 28m
Frontier
Deal found 8/1![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Mon 9/79:36 pm
SEA
- SJU
2 stops39h 46m
Frontier
Deal found 8/2![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Fri 9/114:27 pm
SEA
- SJU
2 stops54h 46m
Frontier
Deal found 8/2![Frontier logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Fri 8/287:06 pm
SEA
- SJU
2 stops26h 50m
Frontier
Deal found 7/31![Frontier logo]()
$222
Find flight deals from Seattle to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) 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 August 2, 2026.
Round-trip from | $441 (American Airlines) |
|---|---|
One-way from | $190 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $574 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle 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 August 2, 2026.
Use the filters below to find and compare flights from Seattle to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Fri 10/30
9:00 am-1:20 am
2 stops13h 20m
San Juan Luis Munoz Marin Intl
Tue 11/3
12:35 pm-10:15 pm
2 stops13h 40m
$466
Quickest round-trip
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Wed 8/26
7:10 am-10:00 pm
2 stops11h 50m
San Juan Luis Munoz Marin Intl
Wed 9/2
8:20 am-5:55 pm
2 stops12h 35m
$481
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 8/23
6:50 pm-10:55 am
2 stops13h 05m
San Juan Luis Munoz Marin Intl
Fri 8/28
10:00 am-8:45 pm
2 stops13h 45m
$494
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Thu 10/22
11:05 am-1:20 am
2 stops11h 15m
San Juan Luis Munoz Marin Intl
Fri 10/30
10:10 am-8:35 pm
2 stops13h 25m
$497
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 8/30
6:50 pm-10:55 am
2 stops13h 05m
San Juan Luis Munoz Marin Intl
Sun 9/6
6:00 am-5:45 pm
2 stops14h 45m
$511
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Fri 8/28
6:15 pm-10:50 am
2 stops13h 35m
San Juan Luis Munoz Marin Intl
Fri 9/4
10:00 am-8:50 pm
2 stops13h 50m
$521
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 9/6
7:00 pm-9:10 am
2 stops11h 10m
San Juan Luis Munoz Marin Intl
Thu 9/10
10:00 am-8:50 pm
2 stops13h 50m
$524
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 10/26
12:20 pm-12:15 pm
3 stops20h 55m
San Juan Luis Munoz Marin Intl
Tue 10/27
2:46 pm-10:51 pm
1 stop11h 05m
$579
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 10/25
8:35 pm-3:36 pm
2 stops16h 01m
San Juan Luis Munoz Marin Intl
Sun 11/1
8:25 am-9:50 pm
2 stops17h 25m
$625
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Thu 9/3
6:15 pm-11:57 am
2 stops14h 42m
San Juan Luis Munoz Marin Intl
Fri 9/11
1:00 am-7:08 pm
3 stops21h 08m
$625
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Seattle to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Seattle with our price prediction graph.
SEA-PR1
SEA-SJU
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 Seattle to San Juan
SEA-PR1
SEA-SJU
What is the cheapest month to book a flight from Seattle to San Juan?
Currently, October is the cheapest month in which you can book a flight from Seattle to San Juan (average of $453). Flying from Seattle to San Juan in December is currently the most expensive (average of $776). 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.
How much does it cost to fly round-trip from Seattle to San Juan?
Airfare is below average for this route at the moment.
Seattle to San Juan flights typically cost between $473 and $677 in September.The cheapest round-trip price found within the last 5 days was $441 on American Airlines (Sep 9-Sep 16).
How far ahead should I book a flight from Seattle to San Juan?
The best time to book flights from Seattle to San Juan is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 August 2, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Seattle to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Seattle 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 Seattle to San Juan
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Complete your trip
Complete your trip to San Juan by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to San Juan by cabin class
Find flights from Seattle to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and San Juan flights
Browse other Seattle and San Juan flight options. Last updated on August 2, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 8 airlines flying from Seattle to San Juan
Discover the top 8 airlines that operate flights from Seattle 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 August 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$327 | Average$410 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$342 | Average$620 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$363 | Average$535 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$366 | Average$596 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$454 | Average$810 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$474 | Average$596 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$587 | Average$727 | FlexibilityNo cancel fee | On-time75% |