$203+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Jul 16 — Jul 231
Round-trip
1 adult, Economy
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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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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 June 16, 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 June 16, 2026.
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:17 am
SEA
- SJU
1 stop9h 28m
American Airlines
Sat 10/243:50 pm
SJU
- SEA
1 stop10h 03m
American Airlines
Deal found 6/13![American Airlines logo]()
$459
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
Fri 9/189:40 pm
SEA
- SJU
1 stop12h 54m
JetBlue
Sat 10/310:30 am
SJU
- SEA
1 stop13h 12m
JetBlue
Deal found 6/12![JetBlue logo]()
$460
This Delta deal was found by Cheapflights users on 6/12. 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 12/57:20 am
SEA
- SJU
1 stop12h 35m
Delta
Sat 12/127:15 am
SJU
- SEA
2 stops15h 15m
Delta
Deal found 6/12![Delta logo]()
$464
This JetBlue deal was found by Cheapflights users on 6/12. 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.
Mon 10/1211:55 pm
SEA
- SJU
1 stop12h 34m
JetBlue
Wed 10/211:00 pm
SJU
- SEA
1 stop11h 15m
JetBlue
Deal found 6/12![JetBlue logo]()
$465
This American Airlines deal was found by Cheapflights users on 6/12. 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 9/28:21 pm
SEA
- SJU
1 stop16h 50m
American Airlines
Tue 9/87:00 am
SJU
- SEA
1 stop18h 56m
American Airlines
Deal found 6/12![American Airlines logo]()
$469
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Tue 8/188:21 pm
SEA
- SJU
1 stop16h 50m
American Airlines
Tue 8/253:28 pm
SJU
- SEA
1 stop11h 52m
American Airlines
Deal found 6/16![American Airlines logo]()
$474
This American Airlines deal was found by Cheapflights users on 6/15. 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.
Wed 8/196:25 am
SEA
- SJU
1 stop14h 34m
American Airlines
Wed 8/266:00 am
SJU
- SEA
2 stops13h 32m
American Airlines
Deal found 6/15![American Airlines logo]()
$479
This American Airlines deal was found by Cheapflights users on 6/12. 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 stops11h 55m
American Airlines
Sat 9/56:00 am
SJU
- SEA
2 stops13h 41m
American Airlines
Deal found 6/12![American Airlines logo]()
$489
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:50 am
SEA
- SJU
1 stop14h 25m
American Airlines
Sat 9/57:00 am
SJU
- SEA
1 stop18h 56m
American Airlines
Deal found 6/13![American Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 6/12. 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 8/1511:59 pm
SEA
- SJU
1 stop12h 43m
United Airlines
Sat 8/227:00 am
SJU
- SEA
2 stops14h 29m
United Airlines
Deal found 6/12![United Airlines logo]()
$496
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/86:43 pm
SEA
- SJU
2 stops14h 51m
United Airlines
Fri 10/162:00 pm
SJU
- SEA
1 stop10h 15m
United Airlines
Deal found 6/12![United Airlines logo]()
$497
This Delta deal was found by Cheapflights users on 6/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:35 pm
SEA
- SJU
2 stops13h 01m
Delta
Wed 11/47:30 am
SJU
- SEA
2 stops18h 35m
Delta
Deal found 6/13![Delta logo]()
$499
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 June 16, 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 June 16, 2026.
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:10 am
SEA
- SJU
1 stop10h 19m
Delta
Sat 9/121:16 pm
SJU
- SEA
1 stop12h 54m
Delta
Deal found 6/16![Delta logo]()
$464
This Southwest deal was found by Cheapflights users on 6/11. 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 8/96:40 pm
SEA
- SJU
2 stops11h 30m
Southwest
Wed 8/121:45 pm
SJU
- SEA
2 stops12h 20m
Southwest
Deal found 6/11![Southwest logo]()
$510
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Sun 9/1311:04 pm
SEA
- SJU
1 stop10h 50m
United Airlines
Wed 9/237:00 am
SJU
- SEA
1 stop10h 52m
United Airlines
Deal found 6/15![United Airlines logo]()
$554
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:40 am
SEA
- SJU
2 stops11h 25m
Southwest
Tue 8/181:20 pm
SJU
- SEA
2 stops12h 45m
Southwest
Deal found 6/13![Southwest logo]()
$535
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:59 pm
SEA
- SJU
1 stop8h 49m
Delta
Mon 9/2112:58 pm
SJU
- SEA
1 stop14h 01m
Delta
Deal found 6/15![Delta logo]()
$548
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:30 am
SEA
- SJU
2 stops14h 35m
Southwest
Mon 7/206:30 am
SJU
- SEA
1 stop13h 55m
Southwest
Deal found 6/13![Southwest logo]()
$661
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/65:30 am
SEA
- SJU
2 stops13h 00m
Southwest
Sat 7/115:30 am
SJU
- SEA
1 stop16h 40m
Southwest
Deal found 6/13![Southwest logo]()
$696
This Southwest deal was found by Cheapflights users on 6/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/99:00 am
SEA
- SJU
2 stops12h 10m
Southwest
Mon 7/1311:35 am
SJU
- SEA
2 stops14h 35m
Southwest
Deal found 6/14![Southwest logo]()
$696
This Southwest deal was found by Cheapflights users on 6/16. 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.
Fri 7/39:25 pm
SEA
- SJU
1 stop12h 00m
Southwest
Thu 7/1610:20 am
SJU
- SEA
2 stops14h 30m
Southwest
Deal found 6/16![Southwest logo]()
$715
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/65:30 am
SEA
- SJU
2 stops13h 00m
Southwest
Mon 7/1311:35 am
SJU
- SEA
2 stops14h 35m
Southwest
Deal found 6/13![Southwest logo]()
$716
This Southwest deal was found by Cheapflights users on 6/11. 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 6/308:50 am
SEA
- SJU
1 stop12h 55m
Southwest
Fri 7/310:20 am
SJU
- SEA
2 stops14h 30m
Southwest
Deal found 6/11![Southwest logo]()
$801
This Southwest deal was found by Cheapflights users on 6/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/69:00 am
SEA
- SJU
2 stops12h 10m
Southwest
Tue 7/1410:00 am
SJU
- SEA
2 stops13h 30m
Southwest
Deal found 6/14![Southwest logo]()
$801
Last-minute flights from Seattle to San JuanDiscover last-minute flight deals from Seattle to San Juan. Data last updated June 16, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to San Juan. Data last updated June 16, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/212:56 pm
SEA
- SJU
1 stop17h 49m
American Airlines
Wed 7/83:02 pm
SJU
- SEA
1 stop12h 05m
American Airlines
Deal found 6/13![American Airlines logo]()
$634
This Southwest deal was found by Cheapflights users on 6/11. 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 7/29:00 am
SEA
- SJU
2 stops12h 05m
Southwest
Fri 7/109:50 am
SJU
- SEA
2 stops14h 10m
Southwest
Deal found 6/11![Southwest logo]()
$636
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/65:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Tue 7/284:38 pm
SJU
- SEA
1 stop10h 29m
American Airlines
Deal found 6/12![American Airlines logo]()
$635
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/75:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Tue 7/284:38 pm
SJU
- SEA
1 stop10h 29m
American Airlines
Deal found 6/12![American Airlines logo]()
$589
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/95:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Mon 7/1310:35 am
SJU
- SEA
1 stop16h 32m
American Airlines
Deal found 6/12![American Airlines logo]()
$625
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/155:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Sat 7/255:45 am
SJU
- SEA
1 stop17h 20m
American Airlines
Deal found 6/12![American Airlines logo]()
$578
This Faresmojo deal was found by Cheapflights users on 6/13. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:00 am
SEA
- SJU
1 stop10h 34m
JetBlue
Fri 7/242:05 am
SJU
- SEA
1 stop13h 48m
JetBlue
Deal found 6/13![JetBlue logo]()
$602
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Wed 7/225:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Tue 7/2812:59 am
SJU
- SEA
1 stop11h 28m
American Airlines
Deal found 6/14![American Airlines logo]()
$519
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Tue 7/285:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Tue 8/111:38 pm
SJU
- SEA
1 stop13h 42m
American Airlines
Deal found 6/14![American Airlines logo]()
$555
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Fri 7/315:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Sun 8/1612:55 am
SJU
- SEA
1 stop11h 34m
American Airlines
Deal found 6/14![American Airlines logo]()
$575
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 June 16, 2026.
Search for one-way flight options from Seattle to San Juan. Find affordable one-way fares based on user searches. Data last updated June 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/108:53 pm
SEA
- SJU
2 stops48h 35m
Frontier
Deal found 6/11![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 8/127:06 pm
SEA
- SJU
2 stops26h 22m
Frontier
Deal found 6/12![Frontier logo]()
$225
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:35 pm
SEA
- SJU
1 stop10h 11m
Delta
Deal found 6/16![Delta logo]()
$232
This American Airlines deal was found by Cheapflights users on 6/11. 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 8/248:21 pm
SEA
- SJU
1 stop16h 50m
American Airlines
Deal found 6/11![American Airlines logo]()
$236
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/107:00 am
SEA
- SJU
1 stop10h 34m
United Airlines
Deal found 6/11![United Airlines logo]()
$265
This American Airlines deal was found by Cheapflights users on 6/15. 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.
Fri 7/105:10 am
SEA
- SJU
1 stop14h 49m
American Airlines
Deal found 6/15![American Airlines logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/137:06 pm
SEA
- SJU
2 stops26h 22m
Frontier
Deal found 6/15![Frontier logo]()
$269
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Mon 7/135:00 am
SEA
- SJU
1 stop12h 38m
United Airlines
Deal found 6/15![United Airlines logo]()
$278
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Tue 8/1811:16 pm
SEA
- SJU
2 stops12h 22m
American Airlines
Deal found 6/14![American Airlines logo]()
$282
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 June 16, 2026.
Round-trip from | $459 (American Airlines) |
|---|---|
One-way from | $203 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $656 |
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 June 16, 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
Thu 9/3
9:10 am-10:29 pm
1 stop10h 19m
San Juan Luis Munoz Marin Intl
Sat 9/12
1:16 pm-11:10 pm
1 stop12h 54m
$464
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 8/9
6:40 pm-9:10 am
2 stops11h 30m
San Juan Luis Munoz Marin Intl
Wed 8/12
1:45 pm-11:05 pm
2 stops12h 20m
$510
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Tue 8/4
6:40 am-9:05 pm
2 stops11h 25m
San Juan Luis Munoz Marin Intl
Tue 8/18
1:20 pm-11:05 pm
2 stops12h 45m
$535
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sat 9/12
11:59 pm-11:48 am
1 stop8h 49m
San Juan Luis Munoz Marin Intl
Mon 9/21
12:58 pm-11:59 pm
1 stop14h 01m
$548
Quickest round-trip
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 9/13
11:04 pm-12:54 pm
1 stop10h 50m
San Juan Luis Munoz Marin Intl
Wed 9/23
7:00 am-2:52 pm
1 stop10h 52m
$554
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sat 7/11
5:30 am-11:05 pm
2 stops14h 35m
San Juan Luis Munoz Marin Intl
Mon 7/20
6:30 am-5:25 pm
1 stop13h 55m
$661
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 7/6
5:30 am-9:30 pm
2 stops13h 00m
San Juan Luis Munoz Marin Intl
Sat 7/11
5:30 am-7:10 pm
1 stop16h 40m
$696
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Thu 7/9
9:00 am-12:10 am
2 stops12h 10m
San Juan Luis Munoz Marin Intl
Mon 7/13
11:35 am-11:10 pm
2 stops14h 35m
$696
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Fri 7/3
9:25 pm-12:25 pm
1 stop12h 00m
San Juan Luis Munoz Marin Intl
Thu 7/16
10:20 am-9:50 pm
2 stops14h 30m
$715
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 7/6
5:30 am-9:30 pm
2 stops13h 00m
San Juan Luis Munoz Marin Intl
Mon 7/13
11:35 am-11:10 pm
2 stops14h 35m
$716
Showing 1-10 of 20 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, 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 June 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.
How much does it cost to fly round-trip from Seattle to San Juan?
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 June 16, 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.
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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
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Seattle and San Juan flights
Browse other Seattle and San Juan flight options. Last updated on June 16, 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 June 16, 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 June 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$451 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$342 | Average$646 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$363 | Average$551 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$365 | Average$586 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$454 | Average$828 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$494 | Average$631 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$587 | Average$727 | FlexibilityNo cancel fee | On-time75% |