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Cheap flights from Seattle to San Juan from $190

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 San Juan departing on 8/10. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
7:25 pm - 12:20 pm
SEA
-
SJU
13h 55m
2 stops
Southwest Logo
1:20 pm - 11:05 pm
SJU
-
SEA
12h 45m
2 stops
$436Southwest
Mon, Aug 17 - Wed, Aug 26
Southwest Logo
6:15 pm - 10:50 am
SEA
-
SJU
13h 35m
2 stops
Southwest Logo
5:30 am - 3:00 pm
SJU
-
SEA
12h 30m
1 stop
$446Southwest
Fri, Sep 25 - Mon, Sep 28
Southwest Logo
8:55 am - 11:45 pm
SEA
-
SJU
11h 50m
2 stops
Southwest Logo
1:00 pm - 9:40 pm
SJU
-
SEA
11h 40m
2 stops
$450Southwest
Wed, Oct 14 - Sat, Oct 24
American Airlines Logo
11:56 pm - 4:11 pm
SEA
-
SJU
13h 15m
2 stops
American Airlines Logo
12:55 am - 9:29 am
SJU
-
SEA
11h 34m
1 stop
$456American Airlines
Tue, Aug 18 - Sun, Aug 23
Delta Logo
6:05 am - 11:55 pm
SEA
-
SJU
13h 50m
2 stops
Delta Logo
7:15 am - 7:23 pm
SJU
-
SEA
16h 08m
1 stop
$460Delta
Wed, Nov 18 - Mon, Nov 23
Delta Logo
5:45 am - 11:55 pm
SEA
-
SJU
14h 10m
2 stops
Delta Logo
7:15 am - 6:30 pm
SJU
-
SEA
15h 15m
2 stops
$464Delta
Sat, Dec 5 - Sat, Dec 12
American Airlines Logo
6:25 am - 11:59 pm
SEA
-
SJU
14h 34m
1 stop
American Airlines Logo
6:00 am - 12:20 am
SJU
-
SEA
21h 20m
1 stop
$465American Airlines
Wed, Sep 2 - Tue, Sep 8
Southwest Logo
9:00 am - 12:20 am
SEA
-
SJU
12h 20m
2 stops
Southwest Logo
6:35 am - 7:05 pm
SJU
-
SEA
15h 30m
2 stops
$466Southwest
Thu, Oct 22 - Tue, Oct 27
American Airlines Logo
9:58 pm - 1:24 pm
SEA
-
SJU
12h 26m
1 stop
American Airlines Logo
6:00 am - 12:20 am
SJU
-
SEA
21h 20m
1 stop
$469American Airlines
Wed, Sep 2 - Mon, Sep 7
JetBlue Logo
11:45 pm - 2:11 pm
SEA
-
SJU
11h 26m
1 stop
JetBlue Logo
1:50 pm - 10:49 pm
SJU
-
SEA
11h 59m
1 stop
$475JetBlue
Wed, Sep 2 - Sun, Sep 6

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Southwest flights from Seattle to San Juan

Our best Southwest deals on Seattle to San Juan flight tickets
Southwest
Aug 17
SEA7:25 pmSeattle/Tacoma Intl
13h 55m
2 stops
SJU12:20 pmSan Juan Luis Munoz Marin Intl
Aug 26
SJU1:20 pmSan Juan Luis Munoz Marin Intl
12h 45m
2 stops
SEA11:05 pmSeattle/Tacoma Intl
$436
Southwest
Sep 25
SEA10:30 pmSeattle/Tacoma Intl
11h 40m
1 stop
SJU1:10 pmSan Juan Luis Munoz Marin Intl
Sep 28
SJU5:30 amSan Juan Luis Munoz Marin Intl
12h 30m
1 stop
SEA3:00 pmSeattle/Tacoma Intl
$446
Southwest
Oct 14
SEA8:55 amSeattle/Tacoma Intl
11h 50m
2 stops
SJU11:45 pmSan Juan Luis Munoz Marin Intl
Oct 24
SJU1:00 pmSan Juan Luis Munoz Marin Intl
11h 40m
2 stops
SEA9:40 pmSeattle/Tacoma Intl
$450

American Airlines flights from Seattle to San Juan

Our best American Airlines deals on Seattle to San Juan flight tickets
American Airlines
Aug 18
SEA11:56 pmSeattle/Tacoma Intl
13h 15m
2 stops
SJU4:11 pmSan Juan Luis Munoz Marin Intl
Aug 23
SJU12:55 amSan Juan Luis Munoz Marin Intl
11h 34m
1 stop
SEA9:29 amSeattle/Tacoma Intl
$456
American Airlines
Sep 2
SEA6:25 amSeattle/Tacoma Intl
14h 34m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Sep 8
SJU6:00 amSan Juan Luis Munoz Marin Intl
21h 20m
1 stop
SEA12:20 amSeattle/Tacoma Intl
$465
American Airlines
Sep 2
SEA9:58 pmSeattle/Tacoma Intl
12h 26m
1 stop
SJU1:24 pmSan Juan Luis Munoz Marin Intl
Sep 7
SJU6:00 amSan Juan Luis Munoz Marin Intl
21h 20m
1 stop
SEA12:20 amSeattle/Tacoma Intl
$469

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to San Juan 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 July 6, 2026.
Use the filters below to find and compare flights from Seattle to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 8/17

7:25 pm-12:20 pm

2 stops13h 55m

San Juan Luis Munoz Marin Intl

Wed 8/26

1:20 pm-11:05 pm

2 stops12h 45m

$436

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 9/25

6:15 pm-10:50 am

2 stops13h 35m

San Juan Luis Munoz Marin Intl

Mon 9/28

5:30 am-3:00 pm

1 stop12h 30m

$446

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 10/14

8:55 am-11:45 pm

2 stops11h 50m

San Juan Luis Munoz Marin Intl

Sat 10/24

1:00 pm-9:40 pm

2 stops11h 40m

$450

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 8/18

11:56 pm-4:11 pm

2 stops13h 15m

San Juan Luis Munoz Marin Intl

Sun 8/23

12:55 am-9:29 am

1 stop11h 34m

$456

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 11/18

6:05 am-11:55 pm

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Mon 11/23

7:15 am-7:23 pm

1 stop16h 08m

$460

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 12/5

5:45 am-11:55 pm

2 stops14h 10m

San Juan Luis Munoz Marin Intl

Sat 12/12

7:15 am-6:30 pm

2 stops15h 15m

$464

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/2

6:25 am-11:59 pm

1 stop14h 34m

San Juan Luis Munoz Marin Intl

Tue 9/8

6:00 am-12:20 am

1 stop21h 20m

$465

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 10/22

9:00 am-12:20 am

2 stops12h 20m

San Juan Luis Munoz Marin Intl

Tue 10/27

6:35 am-7:05 pm

2 stops15h 30m

$466

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/2

9:58 pm-1:24 pm

1 stop12h 26m

San Juan Luis Munoz Marin Intl

Mon 9/7

6:00 am-12:20 am

1 stop21h 20m

$469
Quickest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/2

11:45 pm-2:11 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Sun 9/6

1:50 pm-10:49 pm

1 stop11h 59m

$475

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 San Juan from

How to get the cheapest flight ticket from Seattle to San Juan

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 typical price of a round-trip flight between Seattle and San Juan?

What is the cheapest month to fly to San Juan?

If you’re not able to fly to San Juan in May, then February is your next best option. Flight prices from Seattle to San Juan during February average around $182.

How far in advance should I book a flight from Seattle to San Juan?

You are more likely to see cheaper flights to San Juan from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $583 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Seattle for as low as $490 on momondo.

Cheap Seattle to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to San Juan

Fastest flight time

9h 38m

Direct flights

None
The fastest flight from Seattle to San Juan takes 9h 38m
There are no direct flights from Seattle to San Juan. There are no popular flight routes from Seattle to San Juan.
Search flight deals

Frequently asked questions about flying from Seattle to San Juan

  • How far is Seattle/Tacoma Intl to San Juan by plane?

    Seattle/Tacoma Intl and San Juan are 3720.7 mi apart from one another. By plane, this route typically takes 9h 38m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to San Juan were last updated today.

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

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

    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 San Juan.

  • What documentation or ID do you need to fly to San Juan?

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

Best airlines flying from Seattle to San Juan

Compare and see reviews for airlines that fly from Seattle to San Juan with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $175Free CancellationRating
5.6
2,841 reviews
Search Frontier flights
JetBluePriceFrom $327Free CancellationRating
7.1
3,010 reviews
Search JetBlue flights
DeltaPriceFrom $342Free CancellationRating
7.8
8,451 reviews
Search Delta flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,945 reviews
Search United Airlines flights
American AirlinesPriceFrom $366Free CancellationRating
7.1
11,783 reviews
Search American Airlines flights
Sun Country AirPriceFrom $454Free CancellationRating
6.8
327 reviews
Search Sun Country Air flights
SouthwestPriceFrom $474Free CancellationRating
7.9
4,252 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $587Free CancellationRating
7.9
12,632 reviews
Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to San Juan?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to San Juan. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to San Juan with flexible booking policies on momondo?

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

How can momondo help me find flights from Seattle to San Juan?

momondo helps you find the best flight between Seattle and San Juan 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 San Juan right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Juan 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.

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Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan
San Juan Isla Grande Airport
San Juan Luis Munoz Marin Intl Airport