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Cheap flights from Seattle to San Juan from $163

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 10/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

American Airlines Logo
6:41 pm - 12:05 pmSEA-SJU
13h 24m2 stops
American Airlines Logo
6:25 am - 10:20 pmSJU-SEA
19h 55m1 stop
$363American Airlines
Find Deal
Wed, Nov 12 - Mon, Nov 17
American Airlines Logo
11:24 pm - 3:54 pmSEA-SJU
13h 30m2 stops
American Airlines Logo
11:56 am - 9:48 pmSJU-SEA
12h 52m2 stops
$364American Airlines
Find Deal
Mon, Oct 6 - Wed, Oct 22
JetBlue Logo
11:40 pm - 4:42 pmSEA-SJU
14h 02m1 stop
JetBlue Logo
1:25 pm - 10:36 pmSJU-SEA
12h 11m1 stop
$370JetBlue
Find Deal
Fri, Oct 17 - Fri, Oct 24
United Airlines Logo
5:30 am - 10:22 pmSEA-SJU
12h 52m2 stops
United Airlines Logo
2:25 pm - 11:10 pmSJU-SEA
12h 45m1 stop
$373United Airlines
Find Deal
Tue, Nov 4 - Thu, Nov 20
JetBlue Logo
11:40 pm - 9:24 pmSEA-SJU
18h 44m1 stop
JetBlue Logo
9:30 pm - 10:21 pmSJU-SEA
27h 51m1 stop
$377JetBlue
Find Deal
Fri, Oct 17 - Mon, Oct 20
United Airlines Logo
7:00 am - 9:00 pmSEA-SJU
10h 00m1 stop
United Airlines Logo
7:45 am - 6:10 pmSJU-SEA
14h 25m2 stops
$378United Airlines
Find Deal
Sun, Feb 22 - Sat, Feb 28
Frontier Logo
12:58 pm - 11:46 amSEA-SJU
18h 48m2 stops
Frontier Logo
3:59 am - 6:32 pmSJU-SEA
18h 33m2 stops
$393Frontier
Find Deal
Wed, Nov 12 - Fri, Nov 14
Frontier Logo
12:58 pm - 11:19 amSEA-SJU
18h 21m2 stops
Frontier Logo
3:59 am - 12:13 pmSJU-SEA
12h 14m2 stops
$396Frontier
Find Deal
Sat, Nov 8 - Fri, Nov 14
Delta Logo
6:00 am - 9:59 pmSEA-SJU
12h 59m1 stop
Delta Logo
7:15 am - 4:27 pmSJU-SEA
13h 12m1 stop
$400Delta
Find Deal
Tue, Oct 28 - Thu, Nov 6
Delta Logo
6:00 am - 11:13 pmSEA-SJU
13h 13m1 stop
Delta Logo
1:57 pm - 11:59 pmSJU-SEA
14h 02m1 stop
$436Delta
Find Deal
Sun, Nov 9 - Thu, Nov 13

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
Nov 12
SEA6:41 pmSeattle/Tacoma Intl
13h 24m
2 stops
SJU12:05 pmSan Juan Luis Munoz Marin Intl
Nov 17
SJU6:25 amSan Juan Luis Munoz Marin Intl
19h 55m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
$363
Find similar
American Airlines
Oct 6
SEA11:24 pmSeattle/Tacoma Intl
13h 30m
2 stops
SJU3:54 pmSan Juan Luis Munoz Marin Intl
Oct 22
SJU11:56 amSan Juan Luis Munoz Marin Intl
12h 52m
2 stops
SEA9:48 pmSeattle/Tacoma Intl
$364
Find similar
American Airlines
Mar 2
SEA11:07 pmSeattle/Tacoma Intl
8h 53m
1 stop
SJU12:00 pmSan Juan Luis Munoz Marin Intl
Mar 3
SJU4:15 pmSan Juan Luis Munoz Marin Intl
10h 52m
1 stop
SEA11:07 pmSeattle/Tacoma Intl
$375
Find similar

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

Our best Frontier deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
Frontier
Nov 12
SEA12:58 pmSeattle/Tacoma Intl
18h 48m
2 stops
SJU11:46 amSan Juan Luis Munoz Marin Intl
Nov 14
SJU3:59 amSan Juan Luis Munoz Marin Intl
18h 33m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$393
Find similar
Frontier
Nov 8
SEA12:58 pmSeattle/Tacoma Intl
18h 21m
2 stops
SJU11:19 amSan Juan Luis Munoz Marin Intl
Nov 14
SJU3:59 amSan Juan Luis Munoz Marin Intl
12h 14m
2 stops
SEA12:13 pmSeattle/Tacoma Intl
$396
Find similar
Frontier
Nov 6
SEA1:08 pmSeattle/Tacoma Intl
23h 02m
2 stops
SJU4:10 pmSan Juan Luis Munoz Marin Intl
Nov 14
SJU10:39 pmSan Juan Luis Munoz Marin Intl
17h 34m
2 stops
SEA12:13 pmSeattle/Tacoma Intl
$415
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 September 17, 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

Wed 11/12

6:41 pm-12:05 pm

2 stops13h 24m

San Juan Luis Munoz Marin Intl

Mon 11/17

6:25 am-10:20 pm

1 stop19h 55m

$363

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 10/6

11:24 pm-3:54 pm

2 stops13h 30m

San Juan Luis Munoz Marin Intl

Wed 10/22

11:56 am-9:48 pm

2 stops12h 52m

$364

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/17

11:40 pm-4:42 pm

1 stop14h 02m

San Juan Luis Munoz Marin Intl

Fri 10/24

1:25 pm-10:36 pm

1 stop12h 11m

$370

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 11/4

5:30 am-10:22 pm

2 stops12h 52m

San Juan Luis Munoz Marin Intl

Thu 11/20

2:25 pm-11:10 pm

1 stop12h 45m

$373

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/17

11:40 pm-9:24 pm

1 stop18h 44m

San Juan Luis Munoz Marin Intl

Mon 10/20

9:30 pm-10:21 pm

1 stop27h 51m

$377

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 2/22

7:00 am-9:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

Sat 2/28

7:45 am-6:10 pm

2 stops14h 25m

$378

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 11/12

12:58 pm-11:46 am

2 stops18h 48m

San Juan Luis Munoz Marin Intl

Fri 11/14

3:59 am-6:32 pm

2 stops18h 33m

$393

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 11/8

12:58 pm-11:19 am

2 stops18h 21m

San Juan Luis Munoz Marin Intl

Fri 11/14

3:59 am-12:13 pm

2 stops12h 14m

$396

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 10/28

6:00 am-9:59 pm

1 stop12h 59m

San Juan Luis Munoz Marin Intl

Thu 11/6

7:15 am-4:27 pm

1 stop13h 12m

$400

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 11/9

6:00 am-11:13 pm

1 stop13h 13m

San Juan Luis Munoz Marin Intl

Thu 11/13

1:57 pm-11:59 pm

1 stop14h 02m

$436

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

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 $593 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 $514 on momondo.

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

You could potentially save up to 22% 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 September 2025, prices for Seattle to San Juan Luis Munoz Marin Intl Airport flights are approximately 15% 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

Direct flights

None
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 8h 53m.

  • 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 $194Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $233Free CancellationRating
6.3
8,023 reviews
Search Spirit Airlines flights
JetBluePriceFrom $326Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
American AirlinesPriceFrom $355Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $359Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $368Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Sun Country AirPriceFrom $447Free CancellationRating
6.9
330 reviews
Search Sun Country Air flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $678Free CancellationRating
8.0
10,000 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
Caguas
Humacao
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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