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Cheap flights from Seattle to Puerto Rico from $164

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 10/21. 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
mié., nov. 12 - lun., 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
lun., oct. 6 - mié., oct. 22
JetBlue Logo
11:40 pm - 9:24 pmSEA-SJU
18h 44m1 stop
JetBlue Logo
6:00 am - 10:36 pmSJU-SEA
19h 36m1 stop
$370JetBlue
Find Deal
vie., oct. 17 - vie., 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
mar., nov. 4 - jue., nov. 20
United Airlines Logo
7:00 am - 9:00 pmSEA-SJU
10h 00m1 stop
United Airlines Logo
2:05 am - 11:11 amSJU-SEA
13h 06m1 stop
$377United Airlines
Find Deal
mié., nov. 12 - vie., nov. 14
JetBlue Logo
11:40 pm - 12:57 amSEA-SJU
22h 17m1 stop
JetBlue Logo
1:25 pm - 10:36 pmSJU-SEA
12h 11m1 stop
$382JetBlue
Find Deal
sáb., oct. 11 - jue., oct. 16
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
mié., nov. 12 - vie., 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
sáb., nov. 8 - vie., nov. 14
Delta Logo
11:55 pm - 4:33 pmSEA-SJU
13h 38m2 stops
Delta Logo
7:15 am - 2:01 pmSJU-SEA
10h 46m1 stop
$400Delta
Find Deal
mar., oct. 28 - jue., 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
dom., nov. 9 - jue., nov. 13

American Airlines flights from Seattle to Puerto Rico

Our best American Airlines deals on Seattle to Puerto Rico 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 Puerto Rico

Our best Frontier deals on Seattle to Puerto Rico 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 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 septiembre 17, 2025.
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

mié. 11/12

6:41 pm-12:05 pm

2 stops13h 24m

San Juan Luis Munoz Marin Intl

lun. 11/17

6:25 am-10:20 pm

1 stop19h 55m

$363

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

lun. 10/6

11:24 pm-3:54 pm

2 stops13h 30m

San Juan Luis Munoz Marin Intl

mié. 10/22

11:56 am-9:48 pm

2 stops12h 52m

$364

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

vie. 10/17

11:40 pm-9:24 pm

1 stop18h 44m

San Juan Luis Munoz Marin Intl

vie. 10/24

6:00 am-10:36 pm

1 stop19h 36m

$370

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

mar. 11/4

5:30 am-10:22 pm

2 stops12h 52m

San Juan Luis Munoz Marin Intl

jue. 11/20

2:25 pm-11:10 pm

1 stop12h 45m

$373

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

mié. 11/12

7:00 am-9:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

vie. 11/14

2:05 am-11:11 am

1 stop13h 06m

$377

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

sáb. 10/11

11:40 pm-12:57 am

1 stop22h 17m

San Juan Luis Munoz Marin Intl

jue. 10/16

1:25 pm-10:36 pm

1 stop12h 11m

$382

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

mié. 11/12

12:58 pm-11:46 am

2 stops18h 48m

San Juan Luis Munoz Marin Intl

vie. 11/14

3:59 am-6:32 pm

2 stops18h 33m

$393

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

sáb. 11/8

12:58 pm-11:19 am

2 stops18h 21m

San Juan Luis Munoz Marin Intl

vie. 11/14

3:59 am-12:13 pm

2 stops12h 14m

$396

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

mar. 10/28

11:55 pm-4:33 pm

2 stops13h 38m

San Juan Luis Munoz Marin Intl

jue. 11/6

7:15 am-2:01 pm

1 stop10h 46m

$400

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

dom. 11/9

6:00 am-11:13 pm

1 stop13h 13m

San Juan Luis Munoz Marin Intl

jue. 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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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 January to fly from Seattle, when ticket prices are also cheap, with an average price of $474.

What is the cheapest day to depart on your flight to Puerto Rico?

On average, the least expensive day to fly to Puerto Rico 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. The most expensive day to fly to Puerto Rico is Friday, with ticket prices averaging around $693.

What is the cheapest time of day to depart on your flight to Puerto Rico?

Our most recent data shows that the best time of day to fly to Puerto Rico is at noon. Flights from Seattle to Puerto Rico during this time can be as low as $465. In contrast, the most expensive time of day to depart to Puerto Rico is in the evening when prices are around $584.

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 $593 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 $514 on momondo.

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

You could potentially save up to 22% 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

Direct flights

None
There are no direct flights from Seattle to Puerto Rico. There are no popular flight routes from Seattle to Puerto Rico.
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  • 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 $194Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $233Free CancellationRating
6.3
8,023 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $306Free CancellationRating
7.4
8,926 reviews
Search United 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
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

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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vie. 10/17
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Find better results for your trip to Puerto Rico

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