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Cheap flights from Seattle to San Juan from $174

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 6/26. 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
0 bags

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Find the cheapest flights from Seattle to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:19 pm - 9:13 am
SEA
-
SJU
11h 54m
2 stops
American Airlines Logo
1:47 pm - 10:58 pm
SJU
-
SEA
12h 11m
1 stop
$475American Airlines
Mon, May 18 - Fri, May 29
Delta Logo
7:15 am - 11:35 pm
SEA
-
SJU
13h 20m
1 stop
Delta Logo
1:10 pm - 11:59 pm
SJU
-
SEA
13h 49m
2 stops
$494Delta
Tue, Jun 2 - Thu, Jun 11
American Airlines Logo
5:15 am - 10:45 pm
SEA
-
SJU
14h 30m
1 stop
American Airlines Logo
7:16 pm - 12:00 pm
SJU
-
SEA
19h 44m
1 stop
$499American Airlines
Wed, Jun 10 - Tue, Jun 16
Southwest Logo
6:15 am - 10:15 pm
SEA
-
SJU
13h 00m
2 stops
Southwest Logo
1:20 pm - 11:05 pm
SJU
-
SEA
12h 45m
2 stops
$505Southwest
Fri, Aug 7 - Tue, Aug 11
United Airlines Logo
11:20 pm - 12:34 pm
SEA
-
SJU
10h 14m
1 stop
United Airlines Logo
1:00 am - 11:57 am
SJU
-
SEA
13h 57m
1 stop
$528United Airlines
Fri, May 29 - Thu, Jun 4
Southwest Logo
11:05 am - 12:30 am
SEA
-
SJU
10h 25m
1 stop
Southwest Logo
5:00 am - 2:55 pm
SJU
-
SEA
12h 55m
2 stops
$530Southwest
Mon, Aug 3 - Mon, Aug 17
JetBlue Logo
11:39 pm - 1:16 pm
SEA
-
SJU
10h 37m
1 stop
JetBlue Logo
7:50 am - 8:40 pm
SJU
-
SEA
15h 50m
1 stop
$532JetBlue
Mon, Jun 1 - Sat, Jun 13
JetBlue Logo
11:52 pm - 3:30 pm
SEA
-
SJU
12h 38m
1 stop
JetBlue Logo
9:52 am - 8:56 pm
SJU
-
SEA
14h 04m
1 stop
$534JetBlue
Wed, May 27 - Sat, Jun 6
JetBlue Logo
11:52 pm - 5:51 pm
SEA
-
SJU
14h 59m
1 stop
JetBlue Logo
9:52 am - 8:56 pm
SJU
-
SEA
14h 04m
1 stop
$539JetBlue
Wed, May 27 - Sat, Jun 6
American Airlines Logo
6:00 am - 8:51 pm
SEA
-
SJU
11h 51m
1 stop
American Airlines Logo
7:15 pm - 11:57 am
SJU
-
SEA
19h 42m
1 stop
$543American Airlines
Tue, May 19 - Wed, May 27

JetBlue flights from Seattle to San Juan

Our best JetBlue deals on Seattle to San Juan flight tickets
JetBlue
Jun 1
SEA11:39 pmSeattle/Tacoma Intl
10h 37m
1 stop
SJU1:16 pmSan Juan Luis Munoz Marin Intl
Jun 13
SJU7:50 amSan Juan Luis Munoz Marin Intl
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$532
JetBlue
May 27
SEA11:52 pmSeattle/Tacoma Intl
12h 38m
1 stop
SJU3:30 pmSan Juan Luis Munoz Marin Intl
Jun 6
SJU9:52 amSan Juan Luis Munoz Marin Intl
14h 04m
1 stop
SEA8:56 pmSeattle/Tacoma Intl
$534
JetBlue
May 27
SEA11:52 pmSeattle/Tacoma Intl
14h 59m
1 stop
SJU5:51 pmSan Juan Luis Munoz Marin Intl
Jun 6
SJU9:52 amSan Juan Luis Munoz Marin Intl
14h 04m
1 stop
SEA8:56 pmSeattle/Tacoma Intl
$539

American Airlines flights from Seattle to San Juan

Our best American Airlines deals on Seattle to San Juan flight tickets
American Airlines
May 18
SEA6:19 pmSeattle/Tacoma Intl
11h 54m
2 stops
SJU9:13 amSan Juan Luis Munoz Marin Intl
May 29
SJU1:47 pmSan Juan Luis Munoz Marin Intl
12h 11m
1 stop
SEA10:58 pmSeattle/Tacoma Intl
$475
American Airlines
Jun 10
SEA5:15 amSeattle/Tacoma Intl
14h 30m
1 stop
SJU10:45 pmSan Juan Luis Munoz Marin Intl
Jun 16
SJU7:16 pmSan Juan Luis Munoz Marin Intl
19h 44m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$499
American Airlines
May 19
SEA6:00 amSeattle/Tacoma Intl
11h 51m
1 stop
SJU8:51 pmSan Juan Luis Munoz Marin Intl
May 27
SJU7:15 pmSan Juan Luis Munoz Marin Intl
19h 42m
1 stop
SEA11:57 amSeattle/Tacoma Intl
$543

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 May 10, 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 5/18

6:19 pm-9:13 am

2 stops11h 54m

San Juan Luis Munoz Marin Intl

Fri 5/29

1:47 pm-10:58 pm

1 stop12h 11m

$475

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 6/2

7:15 am-11:35 pm

1 stop13h 20m

San Juan Luis Munoz Marin Intl

Thu 6/11

1:10 pm-11:59 pm

2 stops13h 49m

$494

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 6/10

5:15 am-10:45 pm

1 stop14h 30m

San Juan Luis Munoz Marin Intl

Tue 6/16

7:16 pm-12:00 pm

1 stop19h 44m

$499

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 8/7

6:15 am-10:15 pm

2 stops13h 00m

San Juan Luis Munoz Marin Intl

Tue 8/11

1:20 pm-11:05 pm

2 stops12h 45m

$505

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 5/29

11:20 pm-12:34 pm

1 stop10h 14m

San Juan Luis Munoz Marin Intl

Thu 6/4

1:00 am-11:57 am

1 stop13h 57m

$528
Quickest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 8/3

11:05 am-12:30 am

1 stop10h 25m

San Juan Luis Munoz Marin Intl

Mon 8/17

5:00 am-2:55 pm

2 stops12h 55m

$530

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 6/1

11:39 pm-1:16 pm

1 stop10h 37m

San Juan Luis Munoz Marin Intl

Sat 6/13

7:50 am-8:40 pm

1 stop15h 50m

$532

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 5/27

11:52 pm-3:30 pm

1 stop12h 38m

San Juan Luis Munoz Marin Intl

Sat 6/6

9:52 am-8:56 pm

1 stop14h 04m

$534

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 5/27

11:52 pm-5:51 pm

1 stop14h 59m

San Juan Luis Munoz Marin Intl

Sat 6/6

9:52 am-8:56 pm

1 stop14h 04m

$539

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 5/19

6:00 am-8:51 pm

1 stop11h 51m

San Juan Luis Munoz Marin Intl

Wed 5/27

7:15 pm-11:57 am

1 stop19h 42m

$543

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 $587 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 $515 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

10h 20m

Direct flights

None
The fastest flight from Seattle to San Juan takes 10h 20m
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 10h 20m.

  • 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
2,955 reviews
Search Frontier flights
JetBluePriceFrom $282Free CancellationRating
7.1
2,977 reviews
Search JetBlue flights
DeltaPriceFrom $342Free CancellationRating
7.9
8,454 reviews
Search Delta flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
9,694 reviews
Search United Airlines flights
American AirlinesPriceFrom $364Free CancellationRating
7.1
11,667 reviews
Search American Airlines flights
Sun Country AirPriceFrom $454Free CancellationRating
6.8
334 reviews
Search Sun Country Air flights
SouthwestPriceFrom $494Free CancellationRating
8.0
4,304 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $587Free CancellationRating
7.9
12,348 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