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Cheap flights from Seattle to San Juan from $131

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to San Juan departing on 2/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
9:59 pm - 4:50 pm
SEA
-
SJU
14h 51m1 stop
Delta Logo
2:15 pm - 11:15 pm
SJU
-
SEA
13h 00m1 stop
$364Delta
Sat, Jan 31 - Thu, Feb 5
American Airlines Logo
10:57 pm - 1:40 pm
SEA
-
SJU
10h 43m1 stop
American Airlines Logo
2:30 pm - 9:57 pm
SJU
-
SEA
11h 27m1 stop
$370American Airlines
Thu, Feb 19 - Wed, Feb 25
American Airlines Logo
10:08 pm - 4:52 pm
SEA
-
SJU
14h 44m1 stop
American Airlines Logo
9:20 am - 9:57 pm
SJU
-
SEA
15h 37m1 stop
$389American Airlines
Mon, Feb 16 - Wed, Mar 18
American Airlines Logo
12:07 am - 4:01 pm
SEA
-
SJU
11h 54m2 stops
American Airlines Logo
6:33 am - 11:04 pm
SJU
-
SEA
20h 31m1 stop
$395American Airlines
Tue, Feb 17 - Mon, Feb 23
United Airlines Logo
7:00 am - 12:36 am
SEA
-
SJU
13h 36m2 stops
United Airlines Logo
2:05 am - 11:07 am
SJU
-
SEA
13h 02m1 stop
$397United Airlines
Wed, Feb 4 - Sat, Feb 7
Southwest Logo
7:10 am - 12:40 am
SEA
-
SJU
13h 30m2 stops
Southwest Logo
6:10 am - 5:50 pm
SJU
-
SEA
15h 40m2 stops
$418Southwest
Sat, Feb 21 - Tue, Mar 3
American Airlines Logo
6:00 am - 8:51 pm
SEA
-
SJU
11h 51m1 stop
American Airlines Logo
11:59 pm - 9:35 am
SJU
-
SEA
12h 36m1 stop
$421American Airlines
Sat, May 2 - Sat, May 2
American Airlines Logo
5:37 am - 9:34 pm
SEA
-
SJU
11h 57m2 stops
American Airlines Logo
6:33 am - 9:16 pm
SJU
-
SEA
17h 43m1 stop
$426American Airlines
Thu, Mar 5 - Thu, Mar 19
American Airlines Logo
5:37 am - 9:34 pm
SEA
-
SJU
11h 57m2 stops
American Airlines Logo
7:11 am - 11:40 pm
SJU
-
SEA
19h 29m1 stop
$427American Airlines
Mon, Mar 2 - Mon, Mar 9
Delta Logo
6:10 am - 11:58 pm
SEA
-
SJU
13h 48m2 stops
Delta Logo
7:00 am - 12:09 am
SJU
-
SEA
21h 09m2 stops
$430Delta
Mon, Feb 23 - Tue, Mar 3

American Airlines flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Our best American Airlines deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
American Airlines
Feb 19
SEA10:57 pmSeattle/Tacoma Intl
10h 43m
1 stop
SJU1:40 pmSan Juan Luis Munoz Marin Intl
Feb 25
SJU2:30 pmSan Juan Luis Munoz Marin Intl
11h 27m
1 stop
SEA9:57 pmSeattle/Tacoma Intl
$370
Find similar
American Airlines
Feb 16
SEA10:08 pmSeattle/Tacoma Intl
14h 44m
1 stop
SJU4:52 pmSan Juan Luis Munoz Marin Intl
Mar 18
SJU9:20 amSan Juan Luis Munoz Marin Intl
15h 37m
1 stop
SEA9:57 pmSeattle/Tacoma Intl
$389
Find similar
American Airlines
Feb 17
SEA12:07 amSeattle/Tacoma Intl
11h 54m
2 stops
SJU4:01 pmSan Juan Luis Munoz Marin Intl
Feb 23
SJU6:33 amSan Juan Luis Munoz Marin Intl
20h 31m
1 stop
SEA11:04 pmSeattle/Tacoma Intl
$395
Find similar

United Airlines flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Our best United Airlines deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
United Airlines
Feb 4
SEA7:00 amSeattle/Tacoma Intl
13h 36m
2 stops
SJU12:36 amSan Juan Luis Munoz Marin Intl
Feb 7
SJU2:05 amSan Juan Luis Munoz Marin Intl
13h 02m
1 stop
SEA11:07 amSeattle/Tacoma Intl
$397
Find similar
United Airlines
Feb 26
SEA7:00 amSeattle/Tacoma Intl
10h 00m
1 stop
SJU9:00 pmSan Juan Luis Munoz Marin Intl
Mar 6
SJU8:05 amSan Juan Luis Munoz Marin Intl
14h 58m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$435
Find similar
United Airlines
Mar 1
SEA11:59 pmSeattle/Tacoma Intl
11h 41m
1 stop
SJU3:40 pmSan Juan Luis Munoz Marin Intl
Mar 2
SJU2:05 amSan Juan Luis Munoz Marin Intl
13h 09m
1 stop
SEA11:14 amSeattle/Tacoma Intl
$449
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to San Juan Luis Munoz Marin Intl Airport 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, momondo users made 832,500 searches. Data last updated January 7, 2026.
Use the filters below to find and compare flights from Seattle to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 1/31

9:59 pm-4:50 pm

1 stop14h 51m

San Juan Luis Munoz Marin Intl

Thu 2/5

2:15 pm-11:15 pm

1 stop13h 00m

$364

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 2/19

10:57 pm-1:40 pm

1 stop10h 43m

San Juan Luis Munoz Marin Intl

Wed 2/25

2:30 pm-9:57 pm

1 stop11h 27m

$370

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/16

10:08 pm-4:52 pm

1 stop14h 44m

San Juan Luis Munoz Marin Intl

Wed 3/18

9:20 am-9:57 pm

1 stop15h 37m

$389

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 2/17

12:07 am-4:01 pm

2 stops11h 54m

San Juan Luis Munoz Marin Intl

Mon 2/23

6:33 am-11:04 pm

1 stop20h 31m

$395

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 2/4

7:00 am-12:36 am

2 stops13h 36m

San Juan Luis Munoz Marin Intl

Sat 2/7

2:05 am-11:07 am

1 stop13h 02m

$397

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 2/21

7:10 am-12:40 am

2 stops13h 30m

San Juan Luis Munoz Marin Intl

Tue 3/3

6:10 am-5:50 pm

2 stops15h 40m

$418

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 5/2

6:00 am-8:51 pm

1 stop11h 51m

San Juan Luis Munoz Marin Intl

Sat 5/2

11:59 pm-9:35 am

1 stop12h 36m

$421

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 3/5

5:37 am-9:34 pm

2 stops11h 57m

San Juan Luis Munoz Marin Intl

Thu 3/19

6:33 am-9:16 pm

1 stop17h 43m

$426

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 3/2

5:37 am-9:34 pm

2 stops11h 57m

San Juan Luis Munoz Marin Intl

Mon 3/9

7:11 am-11:40 pm

1 stop19h 29m

$427

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/23

6:10 am-11:58 pm

2 stops13h 48m

San Juan Luis Munoz Marin Intl

Tue 3/3

7:00 am-12:09 am

2 stops21h 09m

$430

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Juan from

How to get the cheapest flight ticket from Seattle to San Juan Luis Munoz Marin Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and San Juan Luis Munoz Marin Intl Airport?

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $472.

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $581 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Seattle for as low as $485 on momondo.

How have Seattle to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of January 2026, prices for Seattle to San Juan Luis Munoz Marin Intl Airport flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to San Juan Luis Munoz Marin Intl Airport (SEA to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to San Juan Luis Munoz Marin Intl Airport

Fastest flight time

9h 25m

Direct flights

None
The fastest flight from Seattle to San Juan Luis Munoz Marin Intl Airport takes 9h 25m
There are no direct flights from Seattle to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from Seattle to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

  • How far is Seattle/Tacoma Intl to San Juan Luis Munoz Marin Intl by plane?

    San Juan Luis Munoz Marin Intl is 3726.9 mi away from Seattle/Tacoma Intl. By plane, this route typically takes 9h 25m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to San Juan Luis Munoz Marin Intl Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The travel and health documents you'll need for your trip to San Juan Luis Munoz Marin Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Seattle to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Seattle to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $175Free CancellationRating
5.7
3,063 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $214Free CancellationRating
6.3
8,284 reviews
Search Spirit Airlines flights
JetBluePriceFrom $327Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
DeltaPriceFrom $357Free CancellationRating
7.9
8,022 reviews
Search Delta flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,138 reviews
Search United Airlines flights
American AirlinesPriceFrom $363Free CancellationRating
7.2
11,091 reviews
Search American Airlines flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,249 reviews
Search Southwest flights
Sun Country AirPriceFrom $544Free CancellationRating
6.8
340 reviews
Search Sun Country Air flights
Alaska AirlinesPriceFrom $678Free CancellationRating
8.0
11,658 reviews
Search Alaska Airlines flights

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Humacao
Caguas
Rio Grande
Bayamón

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to San Juan?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Juan from Seattle.

Can I find flights from Seattle to San Juan with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Juan from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to San Juan?

momondo provides multiple filters to help you find the best flight to San Juan from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to San Juan right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Juan, momondo offers a useful price alert feature which will track prices for flights to San Juan from Seattle and alert you when they change.

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