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Cheap flights from Seattle to San Juan from $113

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 1/25. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:48 pm - 11:25 pmSEA-SJU
30h 37m2 stops
Multiple Airlines Logo
2:52 pm - 10:48 pmSJU-SEA
11h 56m1 stop
$418Multiple Airlines
Find Deal
Sat, Dec 6 - Fri, Dec 19
Multiple Airlines Logo
1:37 pm - 11:27 amSEA-SJU
17h 50m2 stops
Multiple Airlines Logo
6:00 am - 8:22 amSJU-SEA
30h 22m1 stop
$419Multiple Airlines
Find Deal
Wed, Nov 19 - Tue, Nov 25
United Airlines Logo
8:10 am - 10:22 pmSEA-SJU
10h 12m1 stop
United Airlines Logo
2:05 am - 11:07 amSJU-SEA
13h 02m1 stop
$420United Airlines
Find Deal
Fri, Jan 23 - Mon, Feb 2
United Airlines Logo
5:00 am - 10:22 pmSEA-SJU
13h 22m2 stops
United Airlines Logo
2:05 am - 11:14 amSJU-SEA
13h 09m1 stop
$425United Airlines
Find Deal
Wed, Feb 18 - Tue, Feb 24
American Airlines Logo
7:15 am - 11:33 pmSEA-SJU
12h 18m1 stop
American Airlines Logo
7:00 am - 3:58 pmSJU-SEA
12h 58m2 stops
$429American Airlines
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Wed, Feb 18 - Tue, Feb 24
United Airlines Logo
5:10 pm - 4:36 pmSEA-SJU
19h 26m2 stops
United Airlines Logo
2:05 am - 9:12 pmSJU-SEA
23h 07m2 stops
$433United Airlines
Find Deal
Mon, Jan 12 - Mon, Jan 26
American Airlines Logo
10:07 pm - 1:05 pmSEA-SJU
10h 58m1 stop
American Airlines Logo
3:58 pm - 11:13 pmSJU-SEA
11h 15m1 stop
$442American Airlines
Find Deal
Fri, Dec 5 - Thu, Dec 18
Delta Logo
5:00 pm - 12:58 pmSEA-SJU
15h 58m2 stops
Delta Logo
7:00 am - 5:00 pmSJU-SEA
14h 00m2 stops
$489Delta
Find Deal
Fri, Dec 5 - Thu, Dec 11
Southwest Logo
6:35 am - 12:40 amSEA-SJU
14h 05m2 stops
Southwest Logo
6:10 am - 5:50 pmSJU-SEA
15h 40m2 stops
$492Southwest
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Fri, Jan 16 - Tue, Jan 20
Southwest Logo
11:55 pm - 4:30 pmSEA-SJU
13h 35m2 stops
Southwest Logo
6:50 am - 7:05 pmSJU-SEA
15h 15m2 stops
$495Southwest
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Wed, Apr 1 - Thu, Apr 9

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 18
SEA7:15 amSeattle/Tacoma Intl
12h 18m
1 stop
SJU11:33 pmSan Juan Luis Munoz Marin Intl
Feb 24
SJU7:00 amSan Juan Luis Munoz Marin Intl
12h 58m
2 stops
SEA3:58 pmSeattle/Tacoma Intl
$429
Find similar
American Airlines
Dec 5
SEA10:07 pmSeattle/Tacoma Intl
10h 58m
1 stop
SJU1:05 pmSan Juan Luis Munoz Marin Intl
Dec 18
SJU3:58 pmSan Juan Luis Munoz Marin Intl
11h 15m
1 stop
SEA11:13 pmSeattle/Tacoma Intl
$442
Find similar
American Airlines
Jan 16
SEA6:12 amSeattle/Tacoma Intl
13h 44m
1 stop
SJU11:56 pmSan Juan Luis Munoz Marin Intl
Feb 25
SJU12:45 pmSan Juan Luis Munoz Marin Intl
13h 32m
2 stops
SEA10:17 pmSeattle/Tacoma Intl
$458
Find similar

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
Jan 16
SEA6:35 amSeattle/Tacoma Intl
14h 05m
2 stops
SJU12:40 amSan Juan Luis Munoz Marin Intl
Jan 20
SJU6:10 amSan Juan Luis Munoz Marin Intl
15h 40m
2 stops
SEA5:50 pmSeattle/Tacoma Intl
$492
Find similar
Southwest
Apr 1
SEA11:55 pmSeattle/Tacoma Intl
13h 35m
2 stops
SJU4:30 pmSan Juan Luis Munoz Marin Intl
Apr 9
SJU6:50 amSan Juan Luis Munoz Marin Intl
15h 15m
2 stops
SEA7:05 pmSeattle/Tacoma Intl
$495
Find similar
Southwest
Apr 18
SEA11:55 pmSeattle/Tacoma Intl
13h 35m
2 stops
SJU4:30 pmSan Juan Luis Munoz Marin Intl
Apr 25
SJU1:10 pmSan Juan Luis Munoz Marin Intl
10h 25m
1 stop
SEA8:35 pmSeattle/Tacoma Intl
$509
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 November 4, 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

Sat 12/6

12:48 pm-11:25 pm

2 stops30h 37m

San Juan Luis Munoz Marin Intl

Fri 12/19

2:52 pm-10:48 pm

1 stop11h 56m

$418

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 11/19

1:37 pm-11:27 am

2 stops17h 50m

San Juan Luis Munoz Marin Intl

Tue 11/25

6:00 am-8:22 am

1 stop30h 22m

$419

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 1/23

8:10 am-10:22 pm

1 stop10h 12m

San Juan Luis Munoz Marin Intl

Mon 2/2

2:05 am-11:07 am

1 stop13h 02m

$420

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 2/18

5:00 am-10:22 pm

2 stops13h 22m

San Juan Luis Munoz Marin Intl

Tue 2/24

2:05 am-11:14 am

1 stop13h 09m

$425

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 2/18

7:15 am-11:33 pm

1 stop12h 18m

San Juan Luis Munoz Marin Intl

Tue 2/24

7:00 am-3:58 pm

2 stops12h 58m

$429

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 1/12

5:10 pm-4:36 pm

2 stops19h 26m

San Juan Luis Munoz Marin Intl

Mon 1/26

2:05 am-9:12 pm

2 stops23h 07m

$433

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 12/5

10:07 pm-1:05 pm

1 stop10h 58m

San Juan Luis Munoz Marin Intl

Thu 12/18

3:58 pm-11:13 pm

1 stop11h 15m

$442

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 12/5

5:00 pm-12:58 pm

2 stops15h 58m

San Juan Luis Munoz Marin Intl

Thu 12/11

7:00 am-5:00 pm

2 stops14h 00m

$489

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 1/16

6:35 am-12:40 am

2 stops14h 05m

San Juan Luis Munoz Marin Intl

Tue 1/20

6:10 am-5:50 pm

2 stops15h 40m

$492

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 4/1

11:55 pm-4:30 pm

2 stops13h 35m

San Juan Luis Munoz Marin Intl

Thu 4/9

6:50 am-7:05 pm

2 stops15h 15m

$495

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 September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $461.

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 $590 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 $520 on momondo.

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

As of November 2025, prices for Seattle to San Juan Luis Munoz Marin Intl Airport flights are approximately 5% cheaper 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.
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  • 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 10m.

  • 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
3,117 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $218Free CancellationRating
6.3
8,113 reviews
Search Spirit Airlines flights
JetBluePriceFrom $327Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
American AirlinesPriceFrom $352Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
DeltaPriceFrom $357Free CancellationRating
7.9
8,004 reviews
Search Delta flights
United AirlinesPriceFrom $367Free CancellationRating
7.4
9,001 reviews
Search United Airlines flights
Sun Country AirPriceFrom $447Free CancellationRating
6.9
335 reviews
Search Sun Country Air flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,239 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $678Free CancellationRating
8.0
11,241 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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