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Cheap flights from Seattle to Puerto Rico from $144

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 Puerto Rico departing on 4/19. 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 Puerto Rico

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
6:00 am - 10:40 pm
SEA
-
SJU
13h 40m
2 stops
Southwest Logo
5:05 am - 6:30 pm
SJU
-
SEA
16h 25m
2 stops
$374Southwest
Tue, Apr 28 - Tue, May 5
American Airlines Logo
1:37 pm - 4:24 am
SEA
-
SJU
11h 47m
1 stop
American Airlines Logo
2:40 pm - 11:04 pm
SJU
-
SEA
11h 24m
1 stop
$389American Airlines
Mon, Mar 16 - Tue, Mar 17
Delta Logo
11:59 pm - 4:31 pm
SEA
-
SJU
13h 32m
2 stops
Delta Logo
7:00 am - 8:07 pm
SJU
-
SEA
16h 07m
1 stop
$394Delta
Fri, May 1 - Thu, May 7
Southwest Logo
9:20 am - 11:40 pm
SEA
-
SJU
11h 20m
2 stops
Southwest Logo
5:05 am - 6:30 pm
SJU
-
SEA
16h 25m
2 stops
$399Southwest
Tue, May 5 - Tue, May 12
Southwest Logo
6:00 am - 10:40 pm
SEA
-
SJU
13h 40m
2 stops
Southwest Logo
11:25 am - 11:55 pm
SJU
-
SEA
15h 30m
2 stops
$411Southwest
Wed, Apr 15 - Wed, Apr 22
Southwest Logo
6:00 am - 9:05 pm
SEA
-
SJU
12h 05m
2 stops
Southwest Logo
11:25 am - 11:35 pm
SJU
-
SEA
15h 10m
2 stops
$423Southwest
Tue, May 5 - Tue, May 19
United Airlines Logo
7:00 am - 11:36 pm
SEA
-
SJU
13h 36m
2 stops
United Airlines Logo
1:05 am - 11:10 am
SJU
-
SEA
13h 05m
1 stop
$426United Airlines
Tue, Mar 10 - Fri, Mar 13
United Airlines Logo
7:05 pm - 12:34 pm
SEA
-
SJU
14h 29m
2 stops
United Airlines Logo
3:56 pm - 12:19 am
SJU
-
SEA
11h 23m
1 stop
$427United Airlines
Sun, Apr 12 - Fri, Apr 17
Southwest Logo
7:10 pm - 10:35 am
SEA
-
SJU
12h 25m
2 stops
Southwest Logo
11:25 am - 11:35 pm
SJU
-
SEA
15h 10m
2 stops
$433Southwest
Tue, May 5 - Tue, May 19
United Airlines Logo
7:05 pm - 12:04 pm
SEA
-
SJU
13h 59m
2 stops
United Airlines Logo
1:40 pm - 9:06 pm
SJU
-
SEA
10h 26m
1 stop
$438United Airlines
Fri, May 1 - Fri, May 15

Delta flights from Seattle to Puerto Rico

Our best Delta deals on Seattle to Puerto Rico flight tickets
Delta
May 1
SEA11:59 pmSeattle/Tacoma Intl
13h 32m
2 stops
SJU4:31 pmSan Juan Luis Munoz Marin Intl
May 7
SJU7:00 amSan Juan Luis Munoz Marin Intl
16h 07m
1 stop
SEA8:07 pmSeattle/Tacoma Intl
$394
Delta
Apr 10
SEA5:30 amSeattle/Tacoma Intl
14h 45m
2 stops
SJU11:15 pmSan Juan Luis Munoz Marin Intl
Apr 21
SJU2:03 pmSan Juan Luis Munoz Marin Intl
10h 46m
1 stop
SEA9:49 pmSeattle/Tacoma Intl
$460
Delta
Apr 10
SEA5:30 amSeattle/Tacoma Intl
14h 45m
2 stops
SJU11:15 pmSan Juan Luis Munoz Marin Intl
Apr 22
SJU6:15 amSan Juan Luis Munoz Marin Intl
15h 15m
2 stops
SEA6:30 pmSeattle/Tacoma Intl
$505

United Airlines flights from Seattle to Puerto Rico

Our best United Airlines deals on Seattle to Puerto Rico flight tickets
United Airlines
Apr 12
SEA7:00 amSeattle/Tacoma Intl
10h 34m
1 stop
SJU8:34 pmSan Juan Luis Munoz Marin Intl
Apr 21
SJU7:20 amSan Juan Luis Munoz Marin Intl
14h 40m
2 stops
SEA7:00 pmSeattle/Tacoma Intl
$427
United Airlines
May 1
SEA7:05 pmSeattle/Tacoma Intl
13h 59m
2 stops
SJU12:04 pmSan Juan Luis Munoz Marin Intl
May 15
SJU1:40 pmSan Juan Luis Munoz Marin Intl
10h 26m
1 stop
SEA9:06 pmSeattle/Tacoma Intl
$438
United Airlines
May 1
SEA11:00 pmSeattle/Tacoma Intl
11h 45m
1 stop
SJU1:45 pmSan Juan Luis Munoz Marin Intl
May 15
SJU1:40 pmSan Juan Luis Munoz Marin Intl
12h 19m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$439

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Puerto Rico 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 February 17, 2026.
Use the filters below to find and compare flights from Seattle to Puerto Rico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 4/28

6:00 am-10:40 pm

2 stops13h 40m

San Juan Luis Munoz Marin Intl

Tue 5/5

5:05 am-6:30 pm

2 stops16h 25m

$374

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 3/16

1:37 pm-4:24 am

1 stop11h 47m

San Juan Luis Munoz Marin Intl

Tue 3/17

2:40 pm-11:04 pm

1 stop11h 24m

$389

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 5/1

11:59 pm-4:31 pm

2 stops13h 32m

San Juan Luis Munoz Marin Intl

Thu 5/7

7:00 am-8:07 pm

1 stop16h 07m

$394

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 5/5

9:20 am-11:40 pm

2 stops11h 20m

San Juan Luis Munoz Marin Intl

Tue 5/12

5:05 am-6:30 pm

2 stops16h 25m

$399

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 4/15

6:00 am-10:40 pm

2 stops13h 40m

San Juan Luis Munoz Marin Intl

Wed 4/22

11:25 am-11:55 pm

2 stops15h 30m

$411

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 5/5

6:00 am-9:05 pm

2 stops12h 05m

San Juan Luis Munoz Marin Intl

Tue 5/19

11:25 am-11:35 pm

2 stops15h 10m

$423

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 3/10

7:00 am-11:36 pm

2 stops13h 36m

San Juan Luis Munoz Marin Intl

Fri 3/13

1:05 am-11:10 am

1 stop13h 05m

$426

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 4/12

7:05 pm-12:34 pm

2 stops14h 29m

San Juan Luis Munoz Marin Intl

Fri 4/17

3:56 pm-12:19 am

1 stop11h 23m

$427

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 5/5

7:10 pm-10:35 am

2 stops12h 25m

San Juan Luis Munoz Marin Intl

Tue 5/19

11:25 am-11:35 pm

2 stops15h 10m

$433

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 5/1

7:05 pm-12:04 pm

2 stops13h 59m

San Juan Luis Munoz Marin Intl

Fri 5/15

1:40 pm-9:06 pm

1 stop10h 26m

$438

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 Puerto Rico from

How to get the cheapest flight ticket from Seattle to Puerto Rico

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 Puerto Rico?

If you don’t want to visit Puerto Rico in October, then you should wait until September to fly from Seattle, when ticket prices are also cheap, with an average price of $474.

How far in advance should I book a flight to Puerto Rico?

You are more likely to see cheaper flights to Puerto Rico from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Puerto Rico for around $580 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Puerto Rico from Seattle for as low as $504 on momondo.

Can stopping save me money on Seattle to Puerto Rico flights?

You could potentially save up to 5% on your flight if you consider stops on a Seattle to Puerto Rico flight.

Cheap Seattle to Puerto Rico flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Puerto Rico

Fastest flight time

9h 25m

Direct flights

None
The fastest flight from Seattle to Puerto Rico takes 9h 25m
There are no direct flights from Seattle to Puerto Rico. There are no popular flight routes from Seattle to Puerto Rico.
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Puerto Rico?

    Prices for flights from Seattle/Tacoma Intl Airport to Puerto Rico were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Puerto Rico?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Puerto Rico?

    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 Puerto Rico.

  • What documentation or ID do you need to fly to Puerto Rico?

    The travel and health documents you'll need for your trip to Puerto Rico 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 Puerto Rico. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Seattle to Puerto Rico

Compare and see reviews for airlines that fly from Seattle to Puerto Rico with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $175Free CancellationRating
5.7
3,047 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $191Free CancellationRating
6.3
8,466 reviews
Search Spirit Airlines flights
DeltaPriceFrom $224Free CancellationRating
7.9
8,206 reviews
Search Delta flights
JetBluePriceFrom $276Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,309 reviews
Search United Airlines flights
American AirlinesPriceFrom $363Free CancellationRating
7.2
11,294 reviews
Search American Airlines flights
Sun Country AirPriceFrom $454Free CancellationRating
6.8
341 reviews
Search Sun Country Air flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,290 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $598Free CancellationRating
8.0
11,893 reviews
Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Puerto Rico?

Finding the right flight to Puerto Rico from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Puerto Rico quick and easy, saving you time and money.

Can I find flights from Seattle to Puerto Rico with flexible booking policies on momondo?

All flight searches from Seattle to Puerto Rico on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Puerto Rico?

momondo helps you find the best flight between Seattle and Puerto Rico by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Puerto Rico from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Puerto Rico trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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Find better results for your trip to Puerto Rico

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