$193+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
May 30 — Jun 61
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to San Juan with Cheapflights
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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 April 30, 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 April 30, 2026.
This Southwest deal was found by Cheapflights users on 4/26. 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 9/206:50 pm
SEA
- SJU
2 stops13h 05m
Southwest
Sun 9/275:30 am
SJU
- SEA
1 stop12h 10m
Southwest
Deal found 4/26![Southwest logo]()
$454
This Southwest deal was found by Cheapflights users on 4/27. 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 8/136:15 pm
SEA
- SJU
2 stops11h 55m
Southwest
Tue 8/181:20 pm
SJU
- SEA
2 stops12h 45m
Southwest
Deal found 4/27![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 4/30. 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 9/26:40 am
SEA
- SJU
2 stops11h 25m
Southwest
Mon 9/76:00 am
SJU
- SEA
2 stops11h 55m
Southwest
Deal found 4/30![Southwest logo]()
$490
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 6/110:35 pm
SEA
- SJU
1 stop11h 22m
American Airlines
Mon 6/810:29 am
SJU
- SEA
1 stop16h 39m
American Airlines
Deal found 4/29![American Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 4/30. 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 12/28:15 am
SEA
- SJU
1 stop17h 04m
American Airlines
Wed 12/98:18 am
SJU
- SEA
1 stop15h 24m
American Airlines
Deal found 4/30![American Airlines logo]()
$499
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 6/15:15 am
SEA
- SJU
1 stop14h 30m
American Airlines
Mon 6/812:57 am
SJU
- SEA
1 stop11h 30m
American Airlines
Deal found 4/29![American Airlines logo]()
$503
This Southwest deal was found by Cheapflights users on 4/26. 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 8/56:40 am
SEA
- SJU
2 stops12h 20m
Southwest
Tue 8/111:20 pm
SJU
- SEA
2 stops12h 45m
Southwest
Deal found 4/26![Southwest logo]()
$510
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 9/58:10 am
SEA
- SJU
1 stop11h 14m
American Airlines
Sun 9/132:25 pm
SJU
- SEA
1 stop13h 48m
American Airlines
Deal found 4/28![American Airlines logo]()
$519
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/811:59 pm
SEA
- SJU
1 stop12h 37m
United Airlines
Mon 11/164:52 pm
SJU
- SEA
1 stop11h 22m
United Airlines
Deal found 4/30![United Airlines logo]()
$522
This American Airlines deal was found by Cheapflights users on 4/30. 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 9/211:59 pm
SEA
- SJU
1 stop20h 08m
American Airlines
Mon 9/76:51 am
SJU
- SEA
1 stop17h 06m
American Airlines
Deal found 4/30![American Airlines logo]()
$524
This Southwest deal was found by Cheapflights users on 4/27. 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.
Sat 9/1210:30 pm
SEA
- SJU
1 stop11h 30m
Southwest
Sun 9/205:30 am
SJU
- SEA
1 stop12h 10m
Southwest
Deal found 4/27![Southwest logo]()
$526
This Southwest deal was found by Cheapflights users on 4/26. 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 8/56:40 am
SEA
- SJU
2 stops12h 20m
Southwest
Mon 8/105:30 am
SJU
- SEA
1 stop12h 30m
Southwest
Deal found 4/26![Southwest logo]()
$530
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 April 30, 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 April 30, 2026.
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/278:00 am
SEA
- SJU
1 stop10h 24m
United Airlines
Tue 6/21:00 am
SJU
- SEA
2 stops13h 38m
United Airlines
Deal found 4/27![United Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:15 am
SEA
- SJU
1 stop13h 20m
Delta
Thu 6/112:04 pm
SJU
- SEA
2 stops12h 55m
Delta
Deal found 4/29![Delta logo]()
$546
This Southwest deal was found by Cheapflights users on 4/29. 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 5/315:35 am
SEA
- SJU
2 stops15h 00m
Southwest
Tue 6/910:00 am
SJU
- SEA
2 stops13h 25m
Southwest
Deal found 4/29![Southwest logo]()
$616
This Delta deal was found by Cheapflights users on 4/27. 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.
Mon 6/16:00 am
SEA
- SJU
2 stops14h 35m
Delta
Thu 6/42:35 pm
SJU
- SEA
1 stop11h 11m
Delta
Deal found 4/27![Delta logo]()
$546
This Southwest deal was found by Cheapflights users on 4/26. 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 7/207:20 pm
SEA
- SJU
2 stops13h 10m
Southwest
Sat 7/255:30 am
SJU
- SEA
1 stop16h 35m
Southwest
Deal found 4/26![Southwest logo]()
$636
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:00 am
SEA
- SJU
2 stops14h 35m
Delta
Tue 6/162:04 pm
SJU
- SEA
1 stop11h 30m
Delta
Deal found 4/29![Delta logo]()
$595
This Southwest deal was found by Cheapflights users on 4/29. 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 6/235:00 am
SEA
- SJU
2 stops11h 45m
Southwest
Sun 6/285:20 am
SJU
- SEA
1 stop16h 45m
Southwest
Deal found 4/29![Southwest logo]()
$636
This Delta deal was found by Cheapflights users on 4/25. 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 5/267:15 am
SEA
- SJU
1 stop13h 20m
Delta
Tue 6/22:35 pm
SJU
- SEA
2 stops12h 35m
Delta
Deal found 4/25![Delta logo]()
$598
This Southwest deal was found by Cheapflights users on 4/29. 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 7/177:20 pm
SEA
- SJU
2 stops12h 10m
Southwest
Tue 7/215:30 am
SJU
- SEA
2 stops12h 15m
Southwest
Deal found 4/29![Southwest logo]()
$641
Last-minute flights from Seattle to San JuanDiscover last-minute flight deals from Seattle to San Juan. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to San Juan. Data last updated April 30, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:10 am
SEA
- SJU
1 stop10h 14m
United Airlines
Wed 5/201:40 pm
SJU
- SEA
1 stop12h 19m
United Airlines
Deal found 4/28![United Airlines logo]()
$581
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/186:00 am
SEA
- SJU
1 stop14h 03m
American Airlines
Fri 5/292:56 pm
SJU
- SEA
1 stop12h 12m
American Airlines
Deal found 4/27![American Airlines logo]()
$585
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/276:00 am
SEA
- SJU
1 stop14h 59m
American Airlines
Sat 6/66:21 am
SJU
- SEA
1 stop18h 14m
American Airlines
Deal found 4/30![American Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/275:20 pm
SEA
- SJU
2 stops16h 14m
United Airlines
Tue 6/21:00 am
SJU
- SEA
2 stops14h 34m
United Airlines
Deal found 4/27![United Airlines logo]()
$584
This United Airlines deal was found by Cheapflights users on 4/26. 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 5/288:00 am
SEA
- SJU
1 stop10h 24m
United Airlines
Tue 6/22:05 am
SJU
- SEA
1 stop11h 42m
United Airlines
Deal found 4/26![United Airlines logo]()
$545
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/296:00 am
SEA
- SJU
1 stop14h 59m
American Airlines
Fri 6/51:47 pm
SJU
- SEA
1 stop12h 11m
American Airlines
Deal found 4/30![American Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2911:05 pm
SEA
- SJU
1 stop11h 15m
Delta
Tue 6/22:35 pm
SJU
- SEA
2 stops12h 35m
Delta
Deal found 4/28![Delta logo]()
$546
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/315:15 am
SEA
- SJU
1 stop14h 30m
American Airlines
Sat 6/612:44 am
SJU
- SEA
1 stop11h 49m
American Airlines
Deal found 4/27![American Airlines logo]()
$549
This Southwest deal was found by Cheapflights users on 4/29. 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 5/315:35 am
SEA
- SJU
2 stops15h 00m
Southwest
Mon 6/85:30 am
SJU
- SEA
1 stop16h 00m
Southwest
Deal found 4/29![Southwest logo]()
$566
This Southwest deal was found by Cheapflights users on 4/29. 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 5/315:35 am
SEA
- SJU
2 stops15h 00m
Southwest
Tue 6/95:00 am
SJU
- SEA
1 stop11h 20m
Southwest
Deal found 4/29![Southwest logo]()
$586
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 April 30, 2026.
Search for one-way flight options from Seattle to San Juan. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 5/307:50 pm
SEA
- SJU
2 stops41h 00m
Frontier
Deal found 4/28![Frontier logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Tue 6/93:33 pm
SEA
- SJU
2 stops29h 42m
Frontier
Deal found 4/28![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/117:50 pm
SEA
- SJU
2 stops42h 36m
Frontier
Deal found 4/27![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/137:50 pm
SEA
- SJU
2 stops25h 07m
Frontier
Deal found 4/27![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/127:50 pm
SEA
- SJU
2 stops49h 07m
Frontier
Deal found 4/27![Frontier logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/47:12 pm
SEA
- SJU
2 stops15h 55m
Frontier
Deal found 4/26![Frontier logo]()
$220
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3011:39 pm
SEA
- SJU
1 stop10h 37m
JetBlue
Deal found 4/28![JetBlue logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Tue 6/237:41 pm
SEA
- SJU
2 stops33h 14m
Frontier
Deal found 4/28![Frontier logo]()
$227
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
SEA
- SJU
2 stops14h 35m
Delta
Deal found 4/28![Delta logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/87:50 pm
SEA
- SJU
2 stops39h 17m
Frontier
Deal found 4/26![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/157:50 pm
SEA
- SJU
2 stops40h 22m
Frontier
Deal found 4/26![Frontier logo]()
$239
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 April 30, 2026.
Round-trip from | $454 (Southwest) |
|---|---|
One-way from | $193 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $643 |
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 April 30, 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
Quickest round-trip
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Wed 5/27
8:00 am-9:24 pm
1 stop10h 24m
San Juan Luis Munoz Marin Intl
Tue 6/2
1:00 am-11:38 am
2 stops13h 38m
$494
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Tue 6/2
7:15 am-11:35 pm
1 stop13h 20m
San Juan Luis Munoz Marin Intl
Thu 6/11
2:04 pm-11:59 pm
2 stops12h 55m
$546
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 6/1
6:00 am-11:35 pm
2 stops14h 35m
San Juan Luis Munoz Marin Intl
Thu 6/4
2:35 pm-10:46 pm
1 stop11h 11m
$546
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 6/1
6:00 am-11:35 pm
2 stops14h 35m
San Juan Luis Munoz Marin Intl
Tue 6/16
2:04 pm-10:34 pm
1 stop11h 30m
$595
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Tue 5/26
7:15 am-11:35 pm
1 stop13h 20m
San Juan Luis Munoz Marin Intl
Tue 6/2
2:35 pm-12:10 am
2 stops12h 35m
$598
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 5/31
5:35 am-11:35 pm
2 stops15h 00m
San Juan Luis Munoz Marin Intl
Tue 6/9
10:00 am-8:25 pm
2 stops13h 25m
$616
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 7/20
7:20 pm-11:30 am
2 stops13h 10m
San Juan Luis Munoz Marin Intl
Sat 7/25
5:30 am-7:05 pm
1 stop16h 35m
$636
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Tue 6/23
5:00 am-7:45 pm
2 stops11h 45m
San Juan Luis Munoz Marin Intl
Sun 6/28
5:20 am-7:05 pm
1 stop16h 45m
$636
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Fri 7/17
7:20 pm-10:30 am
2 stops12h 10m
San Juan Luis Munoz Marin Intl
Tue 7/21
5:30 am-2:45 pm
2 stops12h 15m
$641
Cheapest one-way
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 5/11
10:35 pm-4:29 pm
1 stop14h 54m
$228
Showing 1-10 of 16 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
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 89 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.
What is the cheapest month to book a flight from Seattle to San Juan?
Currently, February is the cheapest month in which you can book a flight from Seattle to San Juan (average of $182). Flying from Seattle to San Juan in January is currently the most expensive (average of $363). 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?
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 April 30, 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.
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Seattle to San Juan
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Complete your trip
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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 April 30, 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 April 30, 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 April 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$462 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$342 | Average$632 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$363 | Average$552 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$364 | Average$581 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$454 | Average$828 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$496 | Average$610 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$587 | Average$727 | FlexibilityNo cancel fee | On-time75% |