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Cheap flights from Seattle to Puerto Rico from $145

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 4/20. 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

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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
10:30 pm - 12:50 pm
SEA
-
SJU
11h 20m
1 stop
Southwest Logo
1:45 pm - 11:35 pm
SJU
-
SEA
12h 50m
2 stops
$454Southwest
Tue, Aug 25 - Tue, Sep 1
American Airlines Logo
6:19 pm - 9:13 am
SEA
-
SJU
11h 54m
2 stops
American Airlines Logo
6:45 am - 10:47 pm
SJU
-
SEA
19h 02m
1 stop
$455American Airlines
Sat, Apr 25 - Sat, May 2
Multiple Airlines Logo
1:34 pm - 5:59 pm
SEA
-
SJU
49h 25m
2 stops
Multiple Airlines Logo
6:09 pm - 9:49 am
SJU
-
SEA
42h 40m
3 stops
$456Multiple Airlines
Wed, Apr 29 - Thu, May 14
American Airlines Logo
6:00 am - 8:51 pm
SEA
-
SJU
11h 51m
1 stop
American Airlines Logo
11:59 pm - 9:35 am
SJU
-
SEA
12h 36m
1 stop
$460American Airlines
Wed, Apr 29 - Wed, May 6
American Airlines Logo
6:00 am - 8:51 pm
SEA
-
SJU
11h 51m
1 stop
American Airlines Logo
6:00 am - 9:23 pm
SJU
-
SEA
18h 23m
1 stop
$469American Airlines
Wed, Apr 29 - Thu, May 14
American Airlines Logo
6:00 am - 8:51 pm
SEA
-
SJU
11h 51m
1 stop
American Airlines Logo
7:25 am - 9:04 pm
SJU
-
SEA
16h 39m
1 stop
$470American Airlines
Wed, Apr 29 - Thu, May 14
Delta Logo
11:14 pm - 12:52 pm
SEA
-
SJU
10h 38m
1 stop
Delta Logo
2:35 pm - 12:12 am
SJU
-
SEA
12h 37m
2 stops
$474Delta
Fri, May 1 - Thu, May 7
American Airlines Logo
1:03 pm - 9:39 am
SEA
-
SJU
17h 36m
1 stop
American Airlines Logo
1:47 pm - 10:58 pm
SJU
-
SEA
12h 11m
1 stop
$475American Airlines
Tue, May 26 - Tue, Jun 2
United Airlines Logo
6:30 am - 11:09 pm
SEA
-
BQN
13h 39m
2 stops
United Airlines Logo
12:15 am - 4:04 pm
BQN
-
SEA
18h 49m
2 stops
$567United Airlines
Tue, Apr 21 - Mon, Apr 27
United Airlines Logo
7:00 am - 11:09 pm
SEA
-
BQN
13h 09m
2 stops
United Airlines Logo
12:15 am - 11:39 am
BQN
-
SEA
14h 24m
2 stops
$610United Airlines
Mon, Apr 27 - Mon, May 4

American Airlines flights from Seattle to Puerto Rico

Our best American Airlines deals on Seattle to Puerto Rico flight tickets
American Airlines
Apr 25
SEA6:19 pmSeattle/Tacoma Intl
11h 54m
2 stops
SJU9:13 amSan Juan Luis Munoz Marin Intl
May 2
SJU6:45 amSan Juan Luis Munoz Marin Intl
19h 02m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
$455
American Airlines
Apr 29
SEA6:00 amSeattle/Tacoma Intl
11h 51m
1 stop
SJU8:51 pmSan Juan Luis Munoz Marin Intl
May 6
SJU11:59 pmSan Juan Luis Munoz Marin Intl
12h 36m
1 stop
SEA9:35 amSeattle/Tacoma Intl
$460
American Airlines
Apr 29
SEA6:00 amSeattle/Tacoma Intl
11h 51m
1 stop
SJU8:51 pmSan Juan Luis Munoz Marin Intl
May 14
SJU6:00 amSan Juan Luis Munoz Marin Intl
18h 23m
1 stop
SEA9:23 pmSeattle/Tacoma Intl
$469

United Airlines flights from Seattle to Puerto Rico

Our best United Airlines deals on Seattle to Puerto Rico flight tickets
United Airlines
Apr 17
SEA7:05 pmSeattle/Tacoma Intl
13h 59m
2 stops
SJU12:04 pmSan Juan Luis Munoz Marin Intl
Apr 24
SJU2:55 pmSan Juan Luis Munoz Marin Intl
11h 17m
1 stop
SEA11:12 pmSeattle/Tacoma Intl
$501
United Airlines
Apr 15
SEA6:30 amSeattle/Tacoma Intl
11h 08m
1 stop
SJU8:38 pmSan Juan Luis Munoz Marin Intl
Apr 30
SJU1:00 amSan Juan Luis Munoz Marin Intl
13h 39m
2 stops
SEA11:39 amSeattle/Tacoma Intl
$523
United Airlines
Apr 14
SEA5:00 amSeattle/Tacoma Intl
15h 50m
2 stops
SJU11:50 pmSan Juan Luis Munoz Marin Intl
Apr 21
SJU1:00 amSan Juan Luis Munoz Marin Intl
18h 04m
2 stops
SEA4:04 pmSeattle/Tacoma Intl
$526

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 March 23, 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

Cheapest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 8/25

10:30 pm-12:50 pm

1 stop11h 20m

San Juan Luis Munoz Marin Intl

Tue 9/1

1:45 pm-11:35 pm

2 stops12h 50m

$454

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 4/25

6:19 pm-9:13 am

2 stops11h 54m

San Juan Luis Munoz Marin Intl

Sat 5/2

6:45 am-10:47 pm

1 stop19h 02m

$455

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 4/29

1:34 pm-5:59 pm

2 stops49h 25m

San Juan Luis Munoz Marin Intl

Thu 5/14

6:09 pm-9:49 am

3 stops42h 40m

$456

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 4/29

6:00 am-8:51 pm

1 stop11h 51m

San Juan Luis Munoz Marin Intl

Wed 5/6

11:59 pm-9:35 am

1 stop12h 36m

$460

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 4/29

6:00 am-8:51 pm

1 stop11h 51m

San Juan Luis Munoz Marin Intl

Thu 5/14

6:00 am-9:23 pm

1 stop18h 23m

$469

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 4/29

6:00 am-8:51 pm

1 stop11h 51m

San Juan Luis Munoz Marin Intl

Thu 5/14

7:25 am-9:04 pm

1 stop16h 39m

$470
Quickest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 5/1

11:14 pm-12:52 pm

1 stop10h 38m

San Juan Luis Munoz Marin Intl

Thu 5/7

2:35 pm-12:12 am

2 stops12h 37m

$474

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 5/26

1:03 pm-9:39 am

1 stop17h 36m

San Juan Luis Munoz Marin Intl

Tue 6/2

1:47 pm-10:58 pm

1 stop12h 11m

$475

SeattleAguadilla

SEA - BQN

SEABQN

Seattle/Tacoma Intl

Tue 4/21

6:30 am-11:09 pm

2 stops13h 39m

Aguadilla Borinquen

Mon 4/27

12:15 am-4:04 pm

2 stops18h 49m

$567

SeattleAguadilla

SEA - BQN

SEABQN

Seattle/Tacoma Intl

Mon 4/27

7:00 am-11:09 pm

2 stops13h 09m

Aguadilla Borinquen

Mon 5/4

12:15 am-11:39 am

2 stops14h 24m

$610

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 $465.

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 $578 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 $506 on momondo.

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

You could potentially save up to 12% 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 37m

Direct flights

None
The fastest flight from Seattle to Puerto Rico takes 9h 37m
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
3,018 reviews
Search Frontier flights
DeltaPriceFrom $224Free CancellationRating
7.9
8,319 reviews
Search Delta flights
Spirit AirlinesPriceFrom $258Free CancellationRating
6.3
8,538 reviews
Search Spirit Airlines flights
JetBluePriceFrom $327Free CancellationRating
7.2
2,909 reviews
Search JetBlue flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,460 reviews
Search United Airlines flights
American AirlinesPriceFrom $363Free CancellationRating
7.1
11,489 reviews
Search American Airlines flights
Sun Country AirPriceFrom $454Free CancellationRating
6.8
340 reviews
Search Sun Country Air flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,324 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $587Free CancellationRating
7.9
12,096 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.
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Find better results for your trip to Puerto Rico

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