What airlines fly to Puerto Rico?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Puerto Rico from Seattle according to our data. American Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Puerto Rico. Keep in mind that there are 9 different airlines that fly to Puerto Rico on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Puerto Rico?

Frontier, Delta, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Puerto Rico

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Puerto Rico is 9 as of November 2025.

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.

$109 Cheap Flights from Seattle to Puerto Rico in 2025/26

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12:59 am - 11:33 pmSEA-SJU

18h 34m1 stop

9:25 am - 10:01 pmSJU-SEA

16h 36m1 stop

$423American Airlines

Find Deal

Sun, Mar 1 - Tue, Mar 3

5:18 am - 9:25 pmSEA-SJU

12h 07m1 stop

1:30 am - 9:26 amSJU-SEA

11h 56m1 stop

$425American Airlines

Find Deal

Mon, Dec 15 - Sun, Dec 21

11:06 pm - 4:09 pmSEA-SJU

13h 03m1 stop

6:00 am - 10:01 pmSJU-SEA

20h 01m1 stop

$428American Airlines

Find Deal

Tue, Feb 17 - Fri, Feb 20

12:59 am - 5:01 pmSEA-SJU

12h 02m1 stop

8:19 am - 11:42 pmSJU-SEA

19h 23m1 stop

$429American Airlines

Find Deal

Mon, Feb 9 - Tue, Feb 17

11:45 pm - 2:40 pmSEA-SJU

10h 55m1 stop

8:10 am - 7:03 pmSJU-SEA

14h 53m2 stops

$432United Airlines

Find Deal

Tue, Feb 17 - Fri, Feb 20

5:20 pm - 2:40 pmSEA-SJU

17h 20m2 stops

2:05 am - 9:01 pmSJU-SEA

22h 56m2 stops

$433United Airlines

Find Deal

Mon, Feb 23 - Tue, Mar 3

10:07 pm - 3:28 pmSEA-SJU

13h 21m1 stop

6:25 am - 9:50 pmSJU-SEA

19h 25m1 stop

$437American Airlines

Find Deal

Thu, Dec 4 - Mon, Dec 8

9:32 am - 11:55 pmSEA-SJU

10h 23m1 stop

6:10 am - 11:56 amSJU-SEA

33h 46m2 stops

$440Multiple Airlines

Find Deal

Sun, Nov 23 - Wed, Nov 26

11:01 am - 12:32 pmSEA-SJU

21h 31m2 stops

5:14 pm - 5:06 pmSJU-SEA

27h 52m1 stop

$442Multiple Airlines

Find Deal

Thu, Dec 11 - Thu, Dec 18

7:15 am - 2:40 pmSEA-SJU

27h 25m2 stops

1:05 am - 11:23 amSJU-SEA

13h 18m1 stop

$443United Airlines

Find Deal

Mon, Mar 2 - Tue, Mar 10

American Airlines flights from Seattle to Puerto Rico

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

American Airlines

Mar 1

SEA12:59 amSeattle/Tacoma Intl

18h 34m

1 stop

SJU11:33 pmSan Juan Luis Munoz Marin Intl

Mar 3

SJU9:25 amSan Juan Luis Munoz Marin Intl

16h 36m

1 stop

SEA10:01 pmSeattle/Tacoma Intl

$423

Find similar

American Airlines

Dec 15

SEA5:18 amSeattle/Tacoma Intl

12h 07m

1 stop

SJU9:25 pmSan Juan Luis Munoz Marin Intl

Dec 21

SJU1:30 amSan Juan Luis Munoz Marin Intl

11h 56m

1 stop

SEA9:26 amSeattle/Tacoma Intl

$425

Find similar

American Airlines

Feb 17

SEA11:06 pmSeattle/Tacoma Intl

13h 03m

1 stop

SJU4:09 pmSan Juan Luis Munoz Marin Intl

Feb 20

SJU6:00 amSan Juan Luis Munoz Marin Intl

20h 01m

1 stop

SEA10:01 pmSeattle/Tacoma Intl

$428

Find similar

United Airlines flights from Seattle to Puerto Rico

Our best United Airlines deals on Seattle to Puerto Rico flight tickets

United Airlines

Feb 17

SEA11:45 pmSeattle/Tacoma Intl

10h 55m

1 stop

SJU2:40 pmSan Juan Luis Munoz Marin Intl

Feb 20

SJU8:10 amSan Juan Luis Munoz Marin Intl

14h 53m

2 stops

SEA7:03 pmSeattle/Tacoma Intl

$432

Find similar

United Airlines

Feb 23

SEA5:20 pmSeattle/Tacoma Intl

17h 20m

2 stops

SJU2:40 pmSan Juan Luis Munoz Marin Intl

Mar 3

SJU2:05 amSan Juan Luis Munoz Marin Intl

22h 56m

2 stops

SEA9:01 pmSeattle/Tacoma Intl

$433

Find similar

United Airlines

Mar 2

SEA7:15 amSeattle/Tacoma Intl

27h 25m

2 stops

SJU2:40 pmSan Juan Luis Munoz Marin Intl

Mar 10

SJU1:05 amSan Juan Luis Munoz Marin Intl

13h 18m

1 stop

SEA11:23 amSeattle/Tacoma Intl

$443

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 3/1

12:59 am-11:33 pm

1 stop18h 34m

San Juan Luis Munoz Marin Intl

Tue 3/3

9:25 am-10:01 pm

1 stop16h 36m

$423

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 12/15

5:18 am-9:25 pm

1 stop12h 07m

San Juan Luis Munoz Marin Intl

Sun 12/21

1:30 am-9:26 am

1 stop11h 56m

$425

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 2/17

11:06 pm-4:09 pm

1 stop13h 03m

San Juan Luis Munoz Marin Intl

Fri 2/20

6:00 am-10:01 pm

1 stop20h 01m

$428

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/9

12:59 am-5:01 pm

1 stop12h 02m

San Juan Luis Munoz Marin Intl

Tue 2/17

8:19 am-11:42 pm

1 stop19h 23m

$429

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 2/17

11:45 pm-2:40 pm

1 stop10h 55m

San Juan Luis Munoz Marin Intl

Fri 2/20

8:10 am-7:03 pm

2 stops14h 53m

$432

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/23

5:20 pm-2:40 pm

2 stops17h 20m

San Juan Luis Munoz Marin Intl

Tue 3/3

2:05 am-9:01 pm

2 stops22h 56m

$433

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 12/4

10:07 pm-3:28 pm

1 stop13h 21m

San Juan Luis Munoz Marin Intl

Mon 12/8

6:25 am-9:50 pm

1 stop19h 25m

$437

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 11/23

9:32 am-11:55 pm

1 stop10h 23m

San Juan Luis Munoz Marin Intl

Wed 11/26

6:10 am-11:56 am

2 stops33h 46m

$440

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 12/11

11:01 am-12:32 pm

2 stops21h 31m

San Juan Luis Munoz Marin Intl

Thu 12/18

5:14 pm-5:06 pm

1 stop27h 52m

$442

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 3/2

7:15 am-2:40 pm

2 stops27h 25m

San Juan Luis Munoz Marin Intl

Tue 3/10

1:05 am-11:23 am

1 stop13h 18m

$443

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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

Prices

Airlines

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 $447.

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 $582 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 $510 on momondo.

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.

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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Puerto Rico is 9 as of November 2025.
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
Frontier	PriceFrom $175	Free Cancellation	Rating 5.8 3,111 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $218	Free Cancellation	Rating 6.3 8,139 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $327	Free Cancellation	Rating 7.2 2,907 reviews	Search JetBlue flights
United Airlines	PriceFrom $347	Free Cancellation	Rating 7.4 9,017 reviews	Search United Airlines flights
American Airlines	PriceFrom $352	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
Delta	PriceFrom $357	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
Sun Country Air	PriceFrom $447	Free Cancellation	Rating 6.9 336 reviews	Search Sun Country Air flights
Southwest	PriceFrom $521	Free Cancellation	Rating 7.9 4,238 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $678	Free Cancellation	Rating 8.0 11,282 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

Popular cities in Puerto Rico

Flights to San Juanfrom $96

Flights to Aguadillafrom $174

Flights to Mayagüezfrom $333

Cheap flights from Seattle to Puerto Rico from $109

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 1/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Seattle to Puerto Rico

Cheap round-trip flights

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American Airlines flights from Seattle to Puerto Rico

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

United Airlines flights from Seattle to Puerto Rico

Our best United Airlines deals on Seattle to Puerto Rico flight tickets

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Use the filters below to find and compare flights from Seattle to Puerto Rico that are best for you.

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 $447.

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

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?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Puerto Rico?

Frontier, Delta, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Puerto Rico

What airlines fly to Puerto Rico?

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

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

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?

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

Best airlines flying from Seattle to Puerto Rico

Compare and see reviews for airlines that fly from Seattle to Puerto Rico with momondo

Why use momondo?

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

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

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

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

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Puerto Rico

Popular cities in Puerto Rico

Popular flights according to clicks in the last 7 days on momondo