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

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

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.

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 October 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.

$127 Cheap Flights from Seattle to Puerto Rico in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Puerto Rico

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:12 pm - 3:59 pmSEA-SJU

12h 47m2 stops

9:25 am - 10:01 pmSJU-SEA

16h 36m1 stop

$397American Airlines

Find Deal

Fri, Jan 16 - Wed, Feb 25

5:00 am - 9:00 pmSEA-SJU

12h 00m2 stops

8:10 am - 6:14 pmSJU-SEA

14h 04m2 stops

$401United Airlines

Find Deal

Mon, Jan 12 - Tue, Jan 20

2:22 pm - 4:10 pmSEA-SJU

21h 48m2 stops

10:22 pm - 11:56 amSJU-SEA

17h 34m2 stops

$403Frontier

Find Deal

Sun, Nov 16 - Sun, Nov 23

1:01 pm - 9:40 amSEA-SJU

16h 39m2 stops

4:31 pm - 8:46 amSJU-SEA

20h 15m2 stops

$405Frontier

Find Deal

Thu, Nov 27 - Thu, Dec 4

9:45 am - 12:35 amSEA-SJU

10h 50m1 stop

7:10 am - 11:53 amSJU-SEA

32h 43m2 stops

$407Multiple Airlines

Find Deal

Fri, Dec 5 - Sat, Dec 13

2:22 pm - 3:19 pmSEA-SJU

20h 57m2 stops

10:39 pm - 12:13 pmSJU-SEA

17h 34m2 stops

$408Frontier

Find Deal

Fri, Nov 14 - Sun, Nov 16

5:00 am - 10:22 pmSEA-SJU

13h 22m2 stops

2:05 am - 11:07 amSJU-SEA

13h 02m1 stop

$415United Airlines

Find Deal

Wed, Jan 28 - Sat, Feb 7

6:45 am - 12:35 amSEA-SJU

13h 50m2 stops

12:10 pm - 10:30 pmSJU-SEA

14h 20m2 stops

$429Southwest

Find Deal

Wed, Jan 14 - Wed, Jan 21

12:59 am - 3:13 pmSEA-SJU

10h 14m1 stop

9:25 am - 10:01 pmSJU-SEA

16h 36m1 stop

$443American Airlines

Find Deal

Tue, Feb 17 - Tue, Feb 24

6:35 am - 12:35 amSEA-SJU

14h 00m2 stops

11:20 am - 10:55 pmSJU-SEA

15h 35m2 stops

$474Southwest

Find Deal

Thu, Dec 4 - Wed, Dec 10

American Airlines flights from Seattle to Puerto Rico

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

American Airlines

Jan 16

SEA11:12 pmSeattle/Tacoma Intl

12h 47m

2 stops

SJU3:59 pmSan Juan Luis Munoz Marin Intl

Feb 25

SJU9:25 amSan Juan Luis Munoz Marin Intl

16h 36m

1 stop

SEA10:01 pmSeattle/Tacoma Intl

$397

Find similar

American Airlines

Feb 17

SEA12:59 amSeattle/Tacoma Intl

10h 14m

1 stop

SJU3:13 pmSan Juan Luis Munoz Marin Intl

Feb 24

SJU9:25 amSan Juan Luis Munoz Marin Intl

16h 36m

1 stop

SEA10:01 pmSeattle/Tacoma Intl

$443

Find similar

American Airlines

Jan 13

SEA7:35 amSeattle/Tacoma Intl

10h 51m

1 stop

SJU10:26 pmSan Juan Luis Munoz Marin Intl

Jan 18

SJU6:30 amSan Juan Luis Munoz Marin Intl

19h 37m

1 stop

SEA10:07 pmSeattle/Tacoma Intl

$459

Find similar

Frontier flights from Seattle to Puerto Rico

Our best Frontier deals on Seattle to Puerto Rico flight tickets

Frontier

Nov 16

SEA2:22 pmSeattle/Tacoma Intl

21h 48m

2 stops

SJU4:10 pmSan Juan Luis Munoz Marin Intl

Nov 23

SJU10:22 pmSan Juan Luis Munoz Marin Intl

17h 34m

2 stops

SEA11:56 amSeattle/Tacoma Intl

$403

Find similar

Frontier

Nov 27

SEA1:01 pmSeattle/Tacoma Intl

16h 39m

2 stops

SJU9:40 amSan Juan Luis Munoz Marin Intl

Dec 4

SJU4:31 pmSan Juan Luis Munoz Marin Intl

20h 15m

2 stops

SEA8:46 amSeattle/Tacoma Intl

$405

Find similar

Frontier

Nov 14

SEA2:22 pmSeattle/Tacoma Intl

20h 57m

2 stops

SJU3:19 pmSan Juan Luis Munoz Marin Intl

Nov 16

SJU10:39 pmSan Juan Luis Munoz Marin Intl

17h 34m

2 stops

SEA12:13 pmSeattle/Tacoma Intl

$408

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 1/16

11:12 pm-3:59 pm

2 stops12h 47m

San Juan Luis Munoz Marin Intl

Wed 2/25

9:25 am-10:01 pm

1 stop16h 36m

$397

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 1/12

5:00 am-9:00 pm

2 stops12h 00m

San Juan Luis Munoz Marin Intl

Tue 1/20

8:10 am-6:14 pm

2 stops14h 04m

$401

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 11/16

2:22 pm-4:10 pm

2 stops21h 48m

San Juan Luis Munoz Marin Intl

Sun 11/23

10:22 pm-11:56 am

2 stops17h 34m

$403

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 11/27

1:01 pm-9:40 am

2 stops16h 39m

San Juan Luis Munoz Marin Intl

Thu 12/4

4:31 pm-8:46 am

2 stops20h 15m

$405

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 12/5

9:45 am-12:35 am

1 stop10h 50m

San Juan Luis Munoz Marin Intl

Sat 12/13

7:10 am-11:53 am

2 stops32h 43m

$407

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 11/14

2:22 pm-3:19 pm

2 stops20h 57m

San Juan Luis Munoz Marin Intl

Sun 11/16

10:39 pm-12:13 pm

2 stops17h 34m

$408

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 1/28

5:00 am-10:22 pm

2 stops13h 22m

San Juan Luis Munoz Marin Intl

Sat 2/7

2:05 am-11:07 am

1 stop13h 02m

$415

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 1/14

6:45 am-12:35 am

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Wed 1/21

12:10 pm-10:30 pm

2 stops14h 20m

$429

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 2/17

12:59 am-3:13 pm

1 stop10h 14m

San Juan Luis Munoz Marin Intl

Tue 2/24

9:25 am-10:01 pm

1 stop16h 36m

$443

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 12/4

6:35 am-12:35 am

2 stops14h 00m

San Juan Luis Munoz Marin Intl

Wed 12/10

11:20 am-10:55 pm

2 stops15h 35m

$474

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 September, then you should wait until October to fly from Seattle, when ticket prices are also cheap, with an average price of $459.

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 $588 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 $520 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 October 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 3,123 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $218	Free Cancellation	Rating 6.3 8,116 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $327	Free Cancellation	Rating 7.2 2,906 reviews	Search JetBlue flights
United Airlines	PriceFrom $347	Free Cancellation	Rating 7.4 8,999 reviews	Search United Airlines flights
American Airlines	PriceFrom $351	Free Cancellation	Rating 7.2 11,034 reviews	Search American Airlines flights
Delta	PriceFrom $357	Free Cancellation	Rating 7.9 7,998 reviews	Search Delta flights
Sun Country Air	PriceFrom $447	Free Cancellation	Rating 6.9 335 reviews	Search Sun Country Air flights
Southwest	PriceFrom $521	Free Cancellation	Rating 8.0 4,243 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $678	Free Cancellation	Rating 8.0 11,220 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

Find my bookings

Get notified when prices go down

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

1 adult

Sat 11/29

Sat 12/6

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Puerto Rico

Popular cities in Puerto Rico

Flights to San Juanfrom $90

Flights to Aguadillafrom $176

Flights to Mayagüezfrom $319

Cheap flights from Seattle to Puerto Rico from $127

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 12/5. 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

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to Puerto Rico

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

American Airlines flights from Seattle to Puerto Rico

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

Frontier flights from Seattle to Puerto Rico

Our best Frontier deals on Seattle to Puerto Rico flight tickets

momondo Fare Finder

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 September, then you should wait until October to fly from Seattle, when ticket prices are also cheap, with an average price of $459.

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, United Airlines, 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