$162+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Apr 17 — Apr 241
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Cheapest
Best
Last-minute
One-way
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 March 18, 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 March 18, 2026.
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Sat 4/2510:29 pm
SEA
- SJU
1 stop9h 19m
American Airlines
Thu 4/303:34 pm
SJU
- SEA
1 stop12h 10m
American Airlines
Deal found 3/13![American Airlines logo]()
$416
This KAYAK deal was found by Cheapflights users on 3/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:59 pm
SEA
- SJU
1 stop13h 51m
JetBlue
Sat 10/31:25 pm
SJU
- SEA
1 stop11h 59m
JetBlue
Deal found 3/13![JetBlue logo]()
$427
This KAYAK deal was found by Cheapflights users on 3/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:59 pm
SEA
- SJU
1 stop13h 51m
JetBlue
Mon 10/51:25 pm
SJU
- SEA
1 stop11h 59m
JetBlue
Deal found 3/14![JetBlue logo]()
$433
This Southwest deal was found by Cheapflights users on 3/16. 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.
Tue 4/147:10 pm
SEA
- SJU
2 stops12h 25m
Southwest
Wed 4/225:35 am
SJU
- SEA
2 stops14h 20m
Southwest
Deal found 3/16![Southwest logo]()
$434
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Mon 4/276:00 am
SEA
- SJU
1 stop14h 02m
American Airlines
Mon 5/411:59 pm
SJU
- SEA
1 stop12h 36m
American Airlines
Deal found 3/13![American Airlines logo]()
$435
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/135:00 am
SEA
- SJU
1 stop9h 38m
United Airlines
Tue 4/282:55 pm
SJU
- SEA
1 stop11h 17m
United Airlines
Deal found 3/15![United Airlines logo]()
$436
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Fri 4/246:20 pm
SEA
- SJU
1 stop15h 33m
Multiple Airlines
Fri 5/11:59 am
SJU
- SEA
2 stops34h 28m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$452
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Mon 8/1712:34 am
SEA
- SJU
2 stops12h 25m
American Airlines
Tue 8/256:00 am
SJU
- SEA
1 stop20h 42m
American Airlines
Deal found 3/13![American Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
SEA
- SJU
1 stop10h 34m
United Airlines
Tue 5/57:20 am
SJU
- SEA
2 stops14h 40m
United Airlines
Deal found 3/14![United Airlines logo]()
$455
This American Airlines deal was found by Cheapflights users on 3/16. 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.
Wed 4/292:10 pm
SEA
- SJU
1 stop11h 22m
American Airlines
Wed 5/611:59 pm
SJU
- SEA
1 stop16h 16m
American Airlines
Deal found 3/16![American Airlines logo]()
$460
This Southwest deal was found by Cheapflights users on 3/14. 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.
Tue 4/286:00 am
SEA
- SJU
2 stops13h 40m
Southwest
Tue 5/55:35 am
SJU
- SEA
2 stops14h 20m
Southwest
Deal found 3/14![Southwest logo]()
$463
This American Airlines deal was found by Cheapflights users on 3/13. 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 5/296:00 am
SEA
- SJU
1 stop14h 59m
American Airlines
Tue 6/21:47 pm
SJU
- SEA
1 stop12h 11m
American Airlines
Deal found 3/13![American Airlines logo]()
$464
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 March 18, 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 March 18, 2026.
This United Airlines deal was found by Cheapflights users on 3/16. 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.
Wed 4/226:30 am
SEA
- SJU
1 stop11h 08m
United Airlines
Wed 4/297:20 am
SJU
- SEA
2 stops14h 40m
United Airlines
Deal found 3/16![United Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 3/14. 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.
Sun 5/34:45 pm
SEA
- SJU
2 stops13h 25m
Southwest
Sat 5/91:10 pm
SJU
- SEA
1 stop10h 25m
Southwest
Deal found 3/14![Southwest logo]()
$530
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Mon 5/46:58 pm
SEA
- SJU
2 stops15h 47m
United Airlines
Wed 5/67:20 am
SJU
- SEA
2 stops18h 27m
United Airlines
Deal found 3/12![United Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:00 am
SEA
- SJU
1 stop10h 34m
United Airlines
Tue 4/141:00 am
SJU
- SEA
2 stops13h 48m
United Airlines
Deal found 3/14![United Airlines logo]()
$548
This United Airlines deal was found by Cheapflights users on 3/15. 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.
Fri 5/17:05 pm
SEA
- SJU
2 stops13h 59m
United Airlines
Mon 5/41:00 am
SJU
- SEA
2 stops17h 51m
United Airlines
Deal found 3/15![United Airlines logo]()
$564
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 4/295:00 am
SEA
- SJU
2 stops15h 50m
United Airlines
Thu 5/147:20 am
SJU
- SEA
2 stops19h 39m
United Airlines
Deal found 3/12![United Airlines logo]()
$608
Last-minute flights from Seattle to San JuanDiscover last-minute flight deals from Seattle to San Juan. Data last updated March 18, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to San Juan. Data last updated March 18, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/135:00 am
SEA
- SJU
1 stop9h 38m
United Airlines
Tue 4/282:55 pm
SJU
- SEA
1 stop11h 17m
United Airlines
Deal found 3/15![United Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 3/16. 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.
Tue 4/147:10 pm
SEA
- SJU
2 stops12h 25m
Southwest
Wed 4/225:35 am
SJU
- SEA
2 stops14h 20m
Southwest
Deal found 3/16![Southwest logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Fri 4/246:20 pm
SEA
- SJU
1 stop15h 33m
Multiple Airlines
Fri 5/11:59 am
SJU
- SEA
2 stops34h 28m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$452
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Sat 4/256:19 pm
SEA
- SJU
2 stops11h 54m
American Airlines
Thu 4/3011:38 am
SJU
- SEA
1 stop12h 26m
American Airlines
Deal found 3/13![American Airlines logo]()
$416
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Mon 4/276:00 am
SEA
- SJU
1 stop14h 02m
American Airlines
Mon 5/411:59 pm
SJU
- SEA
1 stop12h 36m
American Airlines
Deal found 3/13![American Airlines logo]()
$435
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
SEA
- SJU
1 stop10h 34m
United Airlines
Tue 5/57:20 am
SJU
- SEA
2 stops14h 40m
United Airlines
Deal found 3/14![United Airlines logo]()
$455
This Southwest deal was found by Cheapflights users on 3/14. 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.
Tue 4/286:00 am
SEA
- SJU
2 stops13h 40m
Southwest
Tue 5/55:35 am
SJU
- SEA
2 stops14h 20m
Southwest
Deal found 3/14![Southwest logo]()
$463
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:10 pm
SEA
- SJU
1 stop11h 22m
American Airlines
Wed 5/611:59 pm
SJU
- SEA
1 stop13h 49m
American Airlines
Deal found 3/17![American Airlines logo]()
$460
This American Airlines deal was found by Cheapflights users on 3/16. 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.
Wed 4/292:10 pm
SEA
- SJU
1 stop11h 22m
American Airlines
Thu 5/146:45 am
SJU
- SEA
1 stop19h 13m
American Airlines
Deal found 3/16![American Airlines logo]()
$467
This eDestinos deal was found by Cheapflights users on 3/16. 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.
Wed 4/2910:22 am
SEA
- SJU
2 stops23h 01m
Multiple Airlines
Thu 5/146:41 pm
SJU
- SEA
3 stops42h 41m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$470
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 March 18, 2026.
Search for one-way flight options from Seattle to San Juan. Find affordable one-way fares based on user searches. Data last updated March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:12 pm
SEA
- SJU
2 stops39h 54m
Frontier
Deal found 3/16![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Tue 4/147:12 pm
SEA
- SJU
2 stops49h 17m
Frontier
Deal found 3/15![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:12 pm
SEA
- SJU
2 stops43h 19m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/135:59 pm
SEA
- SJU
2 stops29h 02m
Frontier
Deal found 3/14![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:45 pm
SEA
- SJU
3 stops38h 21m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:12 pm
SEA
- SJU
3 stops50h 46m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:12 pm
SEA
- SJU
2 stops45h 02m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:07 pm
SEA
- SJU
3 stops25h 51m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$206
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Mon 4/1311:55 pm
SEA
- SJU
1 stop11h 47m
American Airlines
Deal found 3/13![American Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:57 am
SEA
- SJU
2 stops32h 46m
Frontier
Deal found 3/14![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:34 pm
SEA
- SJU
3 stops32h 45m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$212
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 March 18, 2026.
Round-trip from | $416 (American Airlines) |
|---|---|
One-way from | $162 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $597 |
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 March 18, 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
Wed 4/22
6:30 am-8:38 pm
1 stop11h 08m
San Juan Luis Munoz Marin Intl
Wed 4/29
7:20 am-7:00 pm
2 stops14h 40m
$500
Quickest round-trip
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 5/3
4:45 pm-9:10 am
2 stops13h 25m
San Juan Luis Munoz Marin Intl
Sat 5/9
1:10 pm-8:35 pm
1 stop10h 25m
$530
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 5/4
6:58 pm-1:45 pm
2 stops15h 47m
San Juan Luis Munoz Marin Intl
Wed 5/6
7:20 am-10:47 pm
2 stops18h 27m
$544
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Wed 4/8
7:00 am-8:34 pm
1 stop10h 34m
San Juan Luis Munoz Marin Intl
Tue 4/14
1:00 am-11:48 am
2 stops13h 48m
$548
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Fri 5/1
7:05 pm-12:04 pm
2 stops13h 59m
San Juan Luis Munoz Marin Intl
Mon 5/4
1:00 am-3:51 pm
2 stops17h 51m
$564
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Wed 4/29
5:00 am-11:50 pm
2 stops15h 50m
San Juan Luis Munoz Marin Intl
Thu 5/14
7:20 am-11:59 pm
2 stops19h 39m
$608
Cheapest one-way
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Mon 4/13
7:35 pm-11:45 am
2 stops13h 10m
$218
Quickest one-way
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Tue 5/19
7:00 am-8:34 pm
1 stop10h 34m
$237
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sun 4/12
4:45 pm-9:10 am
2 stops13h 25m
$246
SeattleSan Juan
SEA - SJU
SEASJU
Seattle/Tacoma Intl
Sat 5/30
6:00 am-11:59 pm
1 stop14h 59m
$277
Showing 1-10 of 17 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?
Use this chart to determine the optimal time to book a round-trip flight from Seattle to San Juan. Price data was last updated on March 13, 2026.
The best time to book flights from Seattle to San Juan is 90 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, May is the cheapest month in which you can book a flight from Seattle to San Juan (average of $329). Flying from Seattle to San Juan in July is currently the most expensive (average of $417). 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.
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 March 18, 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
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Seattle
Popular flights
Alternative routes for Seattle to San Juan
See prices for flight routes from nearby airports that may be better suited for you.
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 March 18, 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 March 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 9 airlines flying from Seattle to San Juan
Discover the top 9 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 March 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$175 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$218 | Average$341 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$224 | Average$604 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$282 | Average$491 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$363 | Average$560 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$363 | Average$584 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$454 | Average$828 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$521 | Average$626 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$598 | Average$880 | FlexibilityNo cancel fee | On-time75% |