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Cheap flights from Seattle to San Juan from $127

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 3/2. 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
6:05 pm - 1:05 pm
SEA
-
SJU
15h 00m2 stops
Delta Logo
7:00 am - 8:46 pm
SJU
-
SEA
17h 46m2 stops
$363Delta
Mon, Jan 12 - Wed, Jan 28
American Airlines Logo
6:12 am - 11:56 pm
SEA
-
SJU
13h 44m1 stop
American Airlines Logo
6:00 am - 3:34 pm
SJU
-
SEA
13h 34m2 stops
$364American Airlines
Fri, Jan 9 - Thu, Jan 15
United Airlines Logo
7:00 am - 12:36 am
SEA
-
SJU
13h 36m2 stops
United Airlines Logo
8:35 am - 4:01 pm
SJU
-
SEA
11h 26m1 stop
$369United Airlines
Wed, Jan 7 - Wed, Jan 14
American Airlines Logo
7:35 am - 11:59 pm
SEA
-
SJU
12h 24m2 stops
American Airlines Logo
7:07 am - 3:34 pm
SJU
-
SEA
12h 27m1 stop
$370American Airlines
Thu, Jan 22 - Tue, Jan 27
American Airlines Logo
7:35 am - 11:59 pm
SEA
-
SJU
12h 24m2 stops
American Airlines Logo
4:49 pm - 11:42 pm
SJU
-
SEA
10h 53m1 stop
$371American Airlines
Thu, Jan 22 - Tue, Jan 27
American Airlines Logo
6:26 pm - 10:07 am
SEA
-
SJU
11h 41m2 stops
American Airlines Logo
4:03 pm - 11:07 pm
SJU
-
SEA
11h 04m1 stop
$389American Airlines
Mon, Mar 2 - Tue, Mar 3
American Airlines Logo
6:26 pm - 10:07 am
SEA
-
SJU
11h 41m2 stops
American Airlines Logo
1:30 am - 8:41 am
SJU
-
SEA
11h 11m1 stop
$394American Airlines
Sun, Feb 22 - Sat, Mar 7
United Airlines Logo
5:00 am - 9:00 pm
SEA
-
SJU
12h 00m2 stops
United Airlines Logo
8:35 am - 6:26 pm
SJU
-
SEA
13h 51m2 stops
$398United Airlines
Sun, Jan 25 - Wed, Jan 28
Multiple Airlines Logo
9:54 am - 1:41 am
SEA
-
SJU
11h 47m1 stop
Multiple Airlines Logo
2:59 am - 10:29 pm
SJU
-
SEA
23h 30m1 stop
$422Multiple Airlines
Sat, Jan 24 - Sat, Jan 31
American Airlines Logo
6:12 am - 11:56 pm
SEA
-
SJU
13h 44m1 stop
American Airlines Logo
6:00 am - 5:45 pm
SJU
-
SEA
15h 45m2 stops
$425American Airlines
Sat, Jan 10 - Sat, Jan 17

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

Our best Delta deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
Delta
Jan 12
SEA6:05 pmSeattle/Tacoma Intl
15h 00m
2 stops
SJU1:05 pmSan Juan Luis Munoz Marin Intl
Jan 28
SJU7:00 amSan Juan Luis Munoz Marin Intl
17h 46m
2 stops
SEA8:46 pmSeattle/Tacoma Intl
$363
Find similar
Delta
Jan 13
SEA6:15 amSeattle/Tacoma Intl
13h 30m
1 stop
SJU11:45 pmSan Juan Luis Munoz Marin Intl
Jan 21
SJU2:15 pmSan Juan Luis Munoz Marin Intl
13h 00m
1 stop
SEA11:15 pmSeattle/Tacoma Intl
$426
Find similar
Delta
Jan 12
SEA6:05 pmSeattle/Tacoma Intl
15h 00m
2 stops
SJU1:05 pmSan Juan Luis Munoz Marin Intl
Jan 14
SJU3:20 pmSan Juan Luis Munoz Marin Intl
10h 29m
1 stop
SEA9:49 pmSeattle/Tacoma Intl
$444
Find similar

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
Jan 9
SEA6:12 amSeattle/Tacoma Intl
13h 44m
1 stop
SJU11:56 pmSan Juan Luis Munoz Marin Intl
Jan 15
SJU6:00 amSan Juan Luis Munoz Marin Intl
13h 34m
2 stops
SEA3:34 pmSeattle/Tacoma Intl
$364
Find similar
American Airlines
Mar 3
SEA5:39 amSeattle/Tacoma Intl
13h 53m
1 stop
SJU11:32 pmSan Juan Luis Munoz Marin Intl
Mar 11
SJU6:33 amSan Juan Luis Munoz Marin Intl
12h 24m
1 stop
SEA3:57 pmSeattle/Tacoma Intl
$365
Find similar
American Airlines
Jan 22
SEA7:35 amSeattle/Tacoma Intl
12h 24m
2 stops
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Jan 27
SJU7:07 amSan Juan Luis Munoz Marin Intl
12h 27m
1 stop
SEA3:34 pmSeattle/Tacoma Intl
$370
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 December 18, 2025.
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

Mon 1/12

6:05 pm-1:05 pm

2 stops15h 00m

San Juan Luis Munoz Marin Intl

Wed 1/28

7:00 am-8:46 pm

2 stops17h 46m

$363

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 1/9

6:12 am-11:56 pm

1 stop13h 44m

San Juan Luis Munoz Marin Intl

Thu 1/15

6:00 am-3:34 pm

2 stops13h 34m

$364

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 1/7

7:00 am-12:36 am

2 stops13h 36m

San Juan Luis Munoz Marin Intl

Wed 1/14

8:35 am-4:01 pm

1 stop11h 26m

$369

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 1/22

7:35 am-11:59 pm

2 stops12h 24m

San Juan Luis Munoz Marin Intl

Tue 1/27

7:07 am-3:34 pm

1 stop12h 27m

$370

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 1/22

7:35 am-11:59 pm

2 stops12h 24m

San Juan Luis Munoz Marin Intl

Tue 1/27

4:49 pm-11:42 pm

1 stop10h 53m

$371

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 3/2

6:26 pm-10:07 am

2 stops11h 41m

San Juan Luis Munoz Marin Intl

Tue 3/3

4:03 pm-11:07 pm

1 stop11h 04m

$389

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 2/22

6:26 pm-10:07 am

2 stops11h 41m

San Juan Luis Munoz Marin Intl

Sat 3/7

1:30 am-8:41 am

1 stop11h 11m

$394

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 1/25

5:00 am-9:00 pm

2 stops12h 00m

San Juan Luis Munoz Marin Intl

Wed 1/28

8:35 am-6:26 pm

2 stops13h 51m

$398

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 1/24

9:54 am-1:41 am

1 stop11h 47m

San Juan Luis Munoz Marin Intl

Sat 1/31

2:59 am-10:29 pm

1 stop23h 30m

$422

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 1/10

6:12 am-11:56 pm

1 stop13h 44m

San Juan Luis Munoz Marin Intl

Sat 1/17

6:00 am-5:45 pm

2 stops15h 45m

$425

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 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 $447.

What is the cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

On average, the least expensive day to fly to San Juan Luis Munoz Marin Intl Airport from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $504. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $693.

What is the cheapest time of day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is at noon when flights can be purchased for as low as $465. Flights in the evening are often more expensive with an average ticket price of $584.

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 $580 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 $487 on momondo.

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

You could potentially save up to 14% 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 December 2025, prices for Seattle to San Juan Luis Munoz Marin Intl Airport flights are approximately 43% 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 40m

Direct flights

None
The fastest flight from Seattle to San Juan Luis Munoz Marin Intl Airport takes 9h 40m
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 40m.

  • 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
5.8
3,081 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $214Free CancellationRating
6.3
8,190 reviews
Search Spirit Airlines flights
JetBluePriceFrom $327Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
DeltaPriceFrom $357Free CancellationRating
7.9
8,005 reviews
Search Delta flights
American AirlinesPriceFrom $363Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
SouthwestPriceFrom $521Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
Sun Country AirPriceFrom $544Free CancellationRating
6.9
333 reviews
Search Sun Country Air flights
Alaska AirlinesPriceFrom $678Free CancellationRating
8.0
11,477 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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