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Cheap flights from Seattle to San Juan from $218

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 9/1. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
7:25 pm - 12:20 pm
SEA
-
SJU
13h 55m
2 stops
Southwest Logo
5:00 am - 3:00 pm
SJU
-
SEA
13h 00m
2 stops
$450Southwest
Mon, Sep 21 - Fri, Sep 25
American Airlines Logo
11:56 pm - 4:11 pm
SEA
-
SJU
13h 15m
2 stops
American Airlines Logo
6:00 am - 4:41 pm
SJU
-
SEA
13h 41m
2 stops
$456American Airlines
Mon, Aug 24 - Tue, Sep 1
United Airlines Logo
10:58 pm - 1:45 pm
SEA
-
SJU
11h 47m
1 stop
United Airlines Logo
1:00 am - 11:27 am
SJU
-
SEA
13h 27m
2 stops
$459United Airlines
Mon, Sep 28 - Tue, Sep 29
Delta Logo
7:15 am - 11:48 pm
SEA
-
SJU
13h 33m
1 stop
Delta Logo
7:30 am - 6:30 pm
SJU
-
SEA
14h 00m
1 stop
$460Delta
Wed, Sep 23 - Sat, Oct 3
Delta Logo
5:45 am - 11:55 pm
SEA
-
SJU
14h 10m
2 stops
Delta Logo
7:15 am - 6:30 pm
SJU
-
SEA
15h 15m
2 stops
$464Delta
Sat, Dec 5 - Sat, Dec 12
American Airlines Logo
8:10 am - 10:24 pm
SEA
-
SJU
11h 14m
1 stop
American Airlines Logo
12:55 am - 9:29 am
SJU
-
SEA
11h 34m
1 stop
$465American Airlines
Wed, Sep 2 - Sun, Sep 6
Southwest Logo
5:20 am - 9:05 pm
SEA
-
SJU
12h 45m
2 stops
Southwest Logo
10:30 am - 8:25 pm
SJU
-
SEA
12h 55m
2 stops
$466Southwest
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
8:21 pm - 4:11 pm
SEA
-
SJU
16h 50m
1 stop
American Airlines Logo
7:03 am - 10:56 pm
SJU
-
SEA
18h 53m
1 stop
$469American Airlines
Wed, Sep 2 - Tue, Sep 8
JetBlue Logo
9:40 pm - 1:34 pm
SEA
-
SJU
12h 54m
1 stop
JetBlue Logo
10:30 am - 8:42 pm
SJU
-
SEA
13h 12m
1 stop
$475JetBlue
Mon, Sep 21 - Thu, Sep 24
Southwest Logo
8:50 am - 12:45 am
SEA
-
SJU
12h 55m
2 stops
Southwest Logo
6:30 am - 8:25 pm
SJU
-
SEA
16h 55m
2 stops
$480Southwest
Sun, Oct 4 - Mon, Oct 12

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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
Aug 24
SEA11:56 pmSeattle/Tacoma Intl
13h 15m
2 stops
SJU4:11 pmSan Juan Luis Munoz Marin Intl
Sep 1
SJU6:00 amSan Juan Luis Munoz Marin Intl
13h 41m
2 stops
SEA4:41 pmSeattle/Tacoma Intl
$456
American Airlines
Sep 2
SEA6:25 amSeattle/Tacoma Intl
14h 34m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Sep 8
SJU6:00 amSan Juan Luis Munoz Marin Intl
21h 20m
1 stop
SEA12:20 amSeattle/Tacoma Intl
$465
American Airlines
Sep 2
SEA8:21 pmSeattle/Tacoma Intl
10h 22m
1 stop
SJU9:43 amSan Juan Luis Munoz Marin Intl
Sep 6
SJU12:55 amSan Juan Luis Munoz Marin Intl
11h 34m
1 stop
SEA9:29 amSeattle/Tacoma Intl
$469

Southwest flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Our best Southwest deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
Southwest
Sep 21
SEA7:25 pmSeattle/Tacoma Intl
13h 55m
2 stops
SJU12:20 pmSan Juan Luis Munoz Marin Intl
Sep 25
SJU5:00 amSan Juan Luis Munoz Marin Intl
13h 00m
2 stops
SEA3:00 pmSeattle/Tacoma Intl
$450
Southwest
Aug 18
SEA5:20 amSeattle/Tacoma Intl
12h 45m
2 stops
SJU9:05 pmSan Juan Luis Munoz Marin Intl
Aug 25
SJU10:30 amSan Juan Luis Munoz Marin Intl
12h 55m
2 stops
SEA8:25 pmSeattle/Tacoma Intl
$466
Southwest
Oct 4
SEA8:50 amSeattle/Tacoma Intl
12h 55m
2 stops
SJU12:45 amSan Juan Luis Munoz Marin Intl
Oct 12
SJU6:30 amSan Juan Luis Munoz Marin Intl
16h 55m
2 stops
SEA8:25 pmSeattle/Tacoma Intl
$480

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 June 29, 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

Cheapest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 9/21

7:25 pm-12:20 pm

2 stops13h 55m

San Juan Luis Munoz Marin Intl

Fri 9/25

5:00 am-3:00 pm

2 stops13h 00m

$450

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 8/24

11:56 pm-4:11 pm

2 stops13h 15m

San Juan Luis Munoz Marin Intl

Tue 9/1

6:00 am-4:41 pm

2 stops13h 41m

$456

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 9/28

10:58 pm-1:45 pm

1 stop11h 47m

San Juan Luis Munoz Marin Intl

Tue 9/29

1:00 am-11:27 am

2 stops13h 27m

$459

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/23

7:15 am-11:48 pm

1 stop13h 33m

San Juan Luis Munoz Marin Intl

Sat 10/3

7:30 am-6:30 pm

1 stop14h 00m

$460

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 12/5

5:45 am-11:55 pm

2 stops14h 10m

San Juan Luis Munoz Marin Intl

Sat 12/12

7:15 am-6:30 pm

2 stops15h 15m

$464
Quickest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/2

8:10 am-10:24 pm

1 stop11h 14m

San Juan Luis Munoz Marin Intl

Sun 9/6

12:55 am-9:29 am

1 stop11h 34m

$465

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 8/18

5:20 am-9:05 pm

2 stops12h 45m

San Juan Luis Munoz Marin Intl

Tue 8/25

10:30 am-8:25 pm

2 stops12h 55m

$466

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/2

8:21 pm-4:11 pm

1 stop16h 50m

San Juan Luis Munoz Marin Intl

Tue 9/8

7:03 am-10:56 pm

1 stop18h 53m

$469

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 9/21

9:40 pm-1:34 pm

1 stop12h 54m

San Juan Luis Munoz Marin Intl

Thu 9/24

10:30 am-8:42 pm

1 stop13h 12m

$475

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 10/4

8:50 am-12:45 am

2 stops12h 55m

San Juan Luis Munoz Marin Intl

Mon 10/12

6:30 am-8:25 pm

2 stops16h 55m

$480

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 September is also cheap. Prices for this month can be found on momondo for an average of $474.

How far in advance should I book a flight from Seattle 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 $586 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 $490 on momondo.

Can stopping save me money on Seattle to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 1% on your flight if you consider stops on a Seattle to San Juan Luis Munoz Marin Intl Airport flight.

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

As of June 2026, prices for Seattle to San Juan Luis Munoz Marin Intl Airport flights are approximately 39% 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 59m

Direct flights

None
The fastest flight from Seattle to San Juan Luis Munoz Marin Intl Airport takes 9h 59m
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

Frequently asked questions about flying from Seattle to San Juan Luis Munoz Marin Intl Airport

  • 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 59m.

  • 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
5.6
2,854 reviews
Search Frontier flights
JetBluePriceFrom $327Free CancellationRating
7.1
3,012 reviews
Search JetBlue flights
DeltaPriceFrom $342Free CancellationRating
7.8
8,450 reviews
Search Delta flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,895 reviews
Search United Airlines flights
American AirlinesPriceFrom $368Free CancellationRating
7.1
11,766 reviews
Search American Airlines flights
Sun Country AirPriceFrom $454Free CancellationRating
6.8
327 reviews
Search Sun Country Air flights
SouthwestPriceFrom $474Free CancellationRating
7.9
4,246 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $587Free CancellationRating
7.9
12,593 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
Rio Grande
Humacao
Caguas
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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