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Cheap flights from Seattle to San Juan from $161

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 10/6. 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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Find the cheapest flights from Seattle to San Juan

Cheap round-trip flights

JetBlue Logo
11:40 pm - 4:42 pmSEA-SJU
14h 02m1 stop
JetBlue Logo
1:25 pm - 10:36 pmSJU-SEA
12h 11m1 stop
$322JetBlue
Find Deal
Fri, Oct 17 - Fri, Oct 24
JetBlue Logo
11:40 pm - 8:59 pmSEA-SJU
18h 19m1 stop
JetBlue Logo
3:03 am - 10:36 pmSJU-SEA
22h 33m1 stop
$354JetBlue
Find Deal
Fri, Oct 3 - Mon, Oct 6
American Airlines Logo
7:25 am - 11:37 pmSEA-SJU
13h 12m2 stops
American Airlines Logo
6:10 am - 8:09 pmSJU-SEA
16h 59m2 stops
$372American Airlines
Find Deal
Fri, Oct 3 - Sat, Oct 4
United Airlines Logo
11:58 pm - 3:42 pmSEA-SJU
12h 44m1 stop
United Airlines Logo
1:05 am - 10:47 amSJU-SEA
12h 42m1 stop
$377United Airlines
Find Deal
Tue, Sep 23 - Mon, Sep 29
American Airlines Logo
5:43 pm - 2:15 pmSEA-SJU
17h 32m1 stop
American Airlines Logo
1:35 pm - 11:35 pmSJU-SEA
13h 00m1 stop
$378American Airlines
Find Deal
Fri, Oct 3 - Sat, Oct 11
United Airlines Logo
7:00 am - 11:57 pmSEA-SJU
13h 57m2 stops
United Airlines Logo
7:00 am - 6:45 pmSJU-SEA
14h 45m2 stops
$393United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Delta Logo
5:25 am - 9:59 pmSEA-SJU
13h 34m2 stops
Delta Logo
7:15 am - 8:19 pmSJU-SEA
16h 04m2 stops
$432Delta
Find Deal
Mon, Oct 27 - Fri, Oct 31
Southwest Logo
5:15 am - 11:00 pmSEA-SJU
13h 45m2 stops
Southwest Logo
6:10 am - 5:50 pmSJU-SEA
15h 40m2 stops
$456Southwest
Find Deal
Sat, Jan 10 - Wed, Jan 21
Delta Logo
6:00 am - 8:30 pmSEA-SJU
10h 30m1 stop
Delta Logo
6:15 am - 2:54 pmSJU-SEA
12h 39m1 stop
$457Delta
Find Deal
Fri, Jan 9 - Fri, Jan 16
Southwest Logo
9:10 pm - 1:50 pmSEA-SJU
13h 40m2 stops
Southwest Logo
10:40 am - 10:05 pmSJU-SEA
14h 25m2 stops
$483Southwest
Find Deal
Sun, Sep 28 - Sat, Oct 4

JetBlue flights from Seattle to San Juan

Our best JetBlue deals on Seattle to San Juan flight tickets
JetBlue
Oct 17
SEA11:40 pmSeattle/Tacoma Intl
14h 02m
1 stop
SJU4:42 pmSan Juan Luis Munoz Marin Intl
Oct 24
SJU1:25 pmSan Juan Luis Munoz Marin Intl
12h 11m
1 stop
SEA10:36 pmSeattle/Tacoma Intl
$322
Find similar
JetBlue
Oct 3
SEA11:40 pmSeattle/Tacoma Intl
18h 19m
1 stop
SJU8:59 pmSan Juan Luis Munoz Marin Intl
Oct 6
SJU3:03 amSan Juan Luis Munoz Marin Intl
22h 33m
1 stop
SEA10:36 pmSeattle/Tacoma Intl
$354
Find similar
JetBlue
Sep 18
SEA11:59 pmSeattle/Tacoma Intl
13h 44m
1 stop
SJU4:43 pmSan Juan Luis Munoz Marin Intl
Sep 23
SJU1:25 pmSan Juan Luis Munoz Marin Intl
11h 55m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
$356
Find similar

American Airlines flights from Seattle to San Juan

Our best American Airlines deals on Seattle to San Juan flight tickets
American Airlines
Oct 3
SEA7:25 amSeattle/Tacoma Intl
13h 12m
2 stops
SJU11:37 pmSan Juan Luis Munoz Marin Intl
Oct 4
SJU6:10 amSan Juan Luis Munoz Marin Intl
16h 59m
2 stops
SEA8:09 pmSeattle/Tacoma Intl
$372
Find similar
American Airlines
Oct 3
SEA5:43 pmSeattle/Tacoma Intl
17h 32m
1 stop
SJU2:15 pmSan Juan Luis Munoz Marin Intl
Oct 11
SJU1:35 pmSan Juan Luis Munoz Marin Intl
13h 00m
1 stop
SEA11:35 pmSeattle/Tacoma Intl
$378
Find similar
American Airlines
Oct 3
SEA5:43 pmSeattle/Tacoma Intl
17h 32m
1 stop
SJU2:15 pmSan Juan Luis Munoz Marin Intl
Oct 7
SJU1:35 pmSan Juan Luis Munoz Marin Intl
13h 00m
1 stop
SEA11:35 pmSeattle/Tacoma Intl
$385
Find similar

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 August 24, 2025.
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

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/17

11:40 pm-4:42 pm

1 stop14h 02m

San Juan Luis Munoz Marin Intl

Fri 10/24

1:25 pm-10:36 pm

1 stop12h 11m

$322

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/3

11:40 pm-8:59 pm

1 stop18h 19m

San Juan Luis Munoz Marin Intl

Mon 10/6

3:03 am-10:36 pm

1 stop22h 33m

$354

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/3

7:25 am-11:37 pm

2 stops13h 12m

San Juan Luis Munoz Marin Intl

Sat 10/4

6:10 am-8:09 pm

2 stops16h 59m

$372

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 9/23

11:58 pm-3:42 pm

1 stop12h 44m

San Juan Luis Munoz Marin Intl

Mon 9/29

1:05 am-10:47 am

1 stop12h 42m

$377

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/3

5:43 pm-2:15 pm

1 stop17h 32m

San Juan Luis Munoz Marin Intl

Sat 10/11

1:35 pm-11:35 pm

1 stop13h 00m

$378

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 9/23

7:00 am-11:57 pm

2 stops13h 57m

San Juan Luis Munoz Marin Intl

Tue 9/30

7:00 am-6:45 pm

2 stops14h 45m

$393

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 10/27

5:25 am-9:59 pm

2 stops13h 34m

San Juan Luis Munoz Marin Intl

Fri 10/31

7:15 am-8:19 pm

2 stops16h 04m

$432

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 1/10

5:15 am-11:00 pm

2 stops13h 45m

San Juan Luis Munoz Marin Intl

Wed 1/21

6:10 am-5:50 pm

2 stops15h 40m

$456

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 1/9

6:00 am-8:30 pm

1 stop10h 30m

San Juan Luis Munoz Marin Intl

Fri 1/16

6:15 am-2:54 pm

1 stop12h 39m

$457

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 9/28

9:10 pm-1:50 pm

2 stops13h 40m

San Juan Luis Munoz Marin Intl

Sat 10/4

10:40 am-10:05 pm

2 stops14h 25m

$483

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 October, then January is your next best option. Flight prices from Seattle to San Juan during January average around $471.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart from Seattle to San Juan is on a Tuesday when prices can be found for as low as $504. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $693.

What is the cheapest time of day to depart on your flight to San Juan?

The cheapest time of day to fly to San Juan is at noon when flights can be purchased for as low as $465. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $584 on average. Flights to San Juan from Seattle in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $591 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 $484 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

Direct flights

None
There are no direct flights from Seattle to San Juan. There are no popular flight routes from Seattle to San Juan.
Search flight deals

  • 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 03m.

  • 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
5.8
3,202 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $233Free CancellationRating
6.3
8,027 reviews
Search Spirit Airlines flights
JetBluePriceFrom $326Free CancellationRating
7.2
2,919 reviews
Search JetBlue flights
American AirlinesPriceFrom $343Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $352Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
DeltaPriceFrom $363Free CancellationRating
7.9
7,980 reviews
Search Delta flights
Sun Country AirPriceFrom $447Free CancellationRating
6.9
332 reviews
Search Sun Country Air flights
SouthwestPriceFrom $521Free CancellationRating
8.0
4,247 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 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.

An easier way to manage your San Juan trip

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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