$182 Cheap Flights from Seattle (SEA) to San Juan (SJU)

View $182 flight on Sun, Jan 4, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap Flights from Seattle to San Juan (SEA-SJU)

Prices were available within the past 7 days and start at $182 for one-way flights and $358 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Jan 27 - Wed, Jan 28
SEA
Seattle
SJU
San Juan
$358 Roundtrip, found 13 hours ago
$358
Roundtrip
found 13 hours ago
Select Delta flight, departing Tue, Jan 27 from Seattle to San Juan, returning Wed, Jan 28, priced at $358 found 13 hours ago
United
Sun, Jan 25 - Tue, Jan 27
SEA
Seattle
SJU
San Juan
$358 Roundtrip, found 11 hours ago
$358
Roundtrip
found 11 hours ago
Select United flight, departing Sun, Jan 25 from Seattle to San Juan, returning Tue, Jan 27, priced at $358 found 11 hours ago
Southwest Airlines
Tue, Jan 27 - Wed, Jan 28
SEA
Seattle
SJU
San Juan
$358 Roundtrip, found 13 hours ago
$358
Roundtrip
found 13 hours ago
Select Southwest Airlines flight, departing Tue, Jan 27 from Seattle to San Juan, returning Wed, Jan 28, priced at $358 found 13 hours ago
American Airlines
Mon, Jan 19 - Sat, Jan 24
SEA
Seattle
SJU
San Juan
$363 Roundtrip, just found
$363
Roundtrip
just found
Select American Airlines flight, departing Mon, Jan 19 from Seattle to San Juan, returning Sat, Jan 24, priced at $363 just found
Delta
Fri, Jan 30 - Sun, Feb 15
SEA
Seattle
SJU
San Juan
$366 Roundtrip, just found
$366
Roundtrip
just found
Select Delta flight, departing Fri, Jan 30 from Seattle to San Juan, returning Sun, Feb 15, priced at $366 just found
Southwest Airlines
Mon, Jan 19 - Sat, Jan 24
SEA
Seattle
SJU
San Juan
$369 Roundtrip, just found
$369
Roundtrip
just found
Select Southwest Airlines flight, departing Mon, Jan 19 from Seattle to San Juan, returning Sat, Jan 24, priced at $369 just found
American Airlines
Tue, May 12 - Tue, May 19
SEA
Seattle
SJU
San Juan
$372 Roundtrip, found 2 days ago
$372
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, May 12 from Seattle to San Juan, returning Tue, May 19, priced at $372 found 2 days ago
American Airlines
Sun, Jan 11 - Wed, Jan 21
SEA
Seattle
SJU
San Juan
$375 Roundtrip, found 15 hours ago
$375
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sun, Jan 11 from Seattle to San Juan, returning Wed, Jan 21, priced at $375 found 15 hours ago
United
Sun, Dec 7 - Tue, Dec 9
SEA
Seattle
SJU
San Juan
$377 Roundtrip, found 11 hours ago
$377
Roundtrip
found 11 hours ago
Select United flight, departing Sun, Dec 7 from Seattle to San Juan, returning Tue, Dec 9, priced at $377 found 11 hours ago
JetBlue Airways
Fri, May 8 - Tue, May 12
SEA
Seattle
SJU
San Juan
$428 Roundtrip, found 4 hours ago
$428
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Fri, May 8 from Seattle to San Juan, returning Tue, May 12, priced at $428 found 4 hours ago

Find the cheapest month to fly from Seattle (SEA) to San Juan (SJU)

March is typically the cheapest month to fly

From $235 - $631 per traveler.

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $477
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $477

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU) cost?
Lock in a cheap one-way flight from $182 or cheap return flight from $358 from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU)?
January is the most affordable month to fly from SEA to SJU. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest SEA to SJU flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU)?
There aren't any daily direct flights from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from SEA to SJU?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on a number of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU)?
Select a flight from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU) that takes off before 3 PM to reduce the risk of cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Last-minute bookings from SEA to SJU are typically more expensive. For the cheapest rates, start looking for flights as early as possible. That being said, if you're flexible with your travel plans, you may score a cheap fare right before your trip.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Luis Munoz Marin Intl. Airport (SJU)?
If you booked your SEA to SJU flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Luis Munoz Marin Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$357
Distance
3724 mi

Book with confidence

Seattle to San Juan Flights

The cheapest times to fly from Seattle to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to San Juan are during the month of January. You can find some of the cheapest flights from Seattle to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to San Juan

Sunday is one of the best days to book for cheap flights from Seattle to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $182 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to San Juan Flights

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*Available to One Key members.