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Cheap flights from Seattle to San Juan from $160

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 1/19. 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.
American Airlines Logo
5:00 am - 10:09 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
14h 09m2 stops Dallas/Fort Worth Miami
American Airlines Logo
4:17 pm - 12:10 amSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
10h 53m1 stop Dallas/Fort Worth
$320American Airlines
Tue, Oct 20 - Sat, Oct 24
American Airlines Logo
11:59 pm - 3:18 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
11h 19m1 stop Chicago O'Hare Intl
American Airlines Logo
8:20 am - 8:45 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
16h 25m1 stop Charlotte Douglas
$320American Airlines
Sat, Jan 23 - Tue, Feb 2
JetBlue Logo
10:50 pm - 5:20 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
14h 30m1 stop New York John F Kennedy Intl
JetBlue Logo
5:23 pm - 11:59 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
10h 36m1 stop Minneapolis St Paul
$427JetBlue
Mon, Nov 23 - Sat, Dec 5
JetBlue Logo
9:55 pm - 1:05 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
11h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
3:15 pm - 10:05 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
10h 50m1 stop Detroit Metropolitan Wayne County
$427JetBlue
Sun, Jan 17 - Wed, Jan 20
Southwest Logo
8:55 am - 11:45 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
11h 50m2 stops Austin Bergstrom Orlando
Southwest Logo
1:00 pm - 9:40 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
11h 40m2 stops Tampa Denver Intl
$475Southwest
Tue, Oct 20 - Sat, Oct 24
Delta Logo
11:59 pm - 4:49 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
13h 50m2 stops Minneapolis St Paul Atlanta Hartsfield-Jackson
Delta Logo
12:56 pm - 11:58 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
14h 02m1 stop Atlanta Hartsfield-Jackson
$476Delta
Fri, Sep 11 - Sat, Sep 19
Delta Logo
11:59 pm - 1:45 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
10h 46m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:56 pm - 11:55 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
13h 59m2 stops Atlanta Hartsfield-Jackson Minneapolis St Paul
$476Delta
Mon, Sep 28 - Mon, Oct 5
Southwest Logo
6:55 am - 10:00 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
11h 05m2 stops Denver Intl Tampa
Southwest Logo
7:35 am - 4:45 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
13h 10m2 stops Tampa Denver Intl
$496Southwest
Wed, Feb 3 - Mon, Feb 8
United Airlines Logo
8:00 am - 10:22 pmSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
10h 22m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
1:00 pm - 9:05 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
12h 05m1 stop Newark
$510United Airlines
Thu, Jan 28 - Tue, Feb 2
United Airlines Logo
2:41 pm - 5:21 amSEA  Seattle/Tacoma Intl-SJU San Juan Luis Munoz Marin Intl
10h 40m1 stop Denver Intl
United Airlines Logo
1:00 pm - 9:05 pmSJU  San Juan Luis Munoz Marin Intl-SEA Seattle/Tacoma Intl
12h 05m1 stop Newark
$510United Airlines
Thu, Dec 31 - Thu, Jan 21

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American Airlines flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Our best American Airlines deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
American Airlines
Oct 19
SEA6:20 pmSeattle/Tacoma Intl
12h 26m
2 stops
SJU9:46 amSan Juan Luis Munoz Marin Intl
Oct 23
SJU12:41 pmSan Juan Luis Munoz Marin Intl
13h 29m
1 stop
SEA11:10 pmSeattle/Tacoma Intl
$320
American Airlines
Nov 1
SEA9:14 pmSeattle/Tacoma Intl
9h 30m
1 stop
SJU10:44 amSan Juan Luis Munoz Marin Intl
Nov 7
SJU11:34 amSan Juan Luis Munoz Marin Intl
16h 25m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$417
American Airlines
Sep 9
SEA10:45 pmSeattle/Tacoma Intl
11h 47m
1 stop
SJU1:32 pmSan Juan Luis Munoz Marin Intl
Sep 16
SJU2:22 pmSan Juan Luis Munoz Marin Intl
11h 35m
1 stop
SEA10:57 pmSeattle/Tacoma Intl
$422

JetBlue flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Our best JetBlue deals on Seattle to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
Oct 18
SEA10:15 pmSeattle/Tacoma Intl
10h 13m
1 stop
SJU11:28 amSan Juan Luis Munoz Marin Intl
Oct 21
SJU10:30 amSan Juan Luis Munoz Marin Intl
13h 45m
1 stop
SEA9:15 pmSeattle/Tacoma Intl
$515
JetBlue
Oct 15
SEA11:55 pmSeattle/Tacoma Intl
12h 34m
1 stop
SJU3:29 pmSan Juan Luis Munoz Marin Intl
Oct 19
SJU10:30 amSan Juan Luis Munoz Marin Intl
13h 45m
1 stop
SEA9:15 pmSeattle/Tacoma Intl
$517
JetBlue
Sep 30
SEA11:42 pmSeattle/Tacoma Intl
16h 52m
2 stops
SJU7:34 pmSan Juan Luis Munoz Marin Intl
Oct 6
SJU10:30 amSan Juan Luis Munoz Marin Intl
13h 13m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
$569

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to San Juan Luis Munoz Marin Intl Airport 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 18, 2026.
Use the filters below to find and compare flights from Seattle to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Tue 10/20

5:00 am-10:09 pm

2 stops14h 09m

San Juan Luis Munoz Marin Intl

Sat 10/24

4:17 pm-12:10 am

1 stop10h 53m

$320

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Sat 1/23

11:59 pm-3:18 pm

1 stop11h 19m

San Juan Luis Munoz Marin Intl

Tue 2/2

8:20 am-8:45 pm

1 stop16h 25m

$320

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Mon 11/23

10:50 pm-5:20 pm

1 stop14h 30m

San Juan Luis Munoz Marin Intl

Sat 12/5

5:23 pm-11:59 pm

1 stop10h 36m

$427
Quickest round-trip

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Sun 1/17

9:55 pm-1:05 pm

1 stop11h 10m

San Juan Luis Munoz Marin Intl

Wed 1/20

3:15 pm-10:05 pm

1 stop10h 50m

$427

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Tue 10/20

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

$475

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Fri 9/11

11:59 pm-4:49 pm

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Sat 9/19

12:56 pm-11:58 pm

1 stop14h 02m

$476

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Mon 9/28

11:59 pm-1:45 pm

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Mon 10/5

12:56 pm-11:55 pm

2 stops13h 59m

$476

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Wed 2/3

6:55 am-10:00 pm

2 stops11h 05m

San Juan Luis Munoz Marin Intl

Mon 2/8

7:35 am-4:45 pm

2 stops13h 10m

$496

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Thu 1/28

8:00 am-10:22 pm

1 stop10h 22m

San Juan Luis Munoz Marin Intl

Tue 2/2

1:00 pm-9:05 pm

1 stop12h 05m

$510

SeattleSan Juan

SEA Seattle/Tacoma Intl - SJU San Juan Luis Munoz Marin Intl

SEASJU

Seattle/Tacoma Intl

Thu 12/31

2:41 pm-5:21 am

1 stop10h 40m

San Juan Luis Munoz Marin Intl

Thu 1/21

1:00 pm-9:05 pm

1 stop12h 05m

$510

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to San Juan Luis Munoz Marin Intl Airport

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 Luis Munoz Marin Intl Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $466 to $670.
The lowest price recently found on this route was $320.

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $484.

How far in advance should I book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $584 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Seattle for as low as $509 on momondo.

Can stopping save me money on Seattle to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 4% on your flight if you consider stops on a Seattle to San Juan Luis Munoz Marin Intl Airport flight.

How have Seattle to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of August 2026, prices for Seattle to San Juan Luis Munoz Marin Intl Airport flights are approximately 7% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to San Juan Luis Munoz Marin Intl Airport (SEA to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to San Juan Luis Munoz Marin Intl Airport

Best Price Found

$160

Fastest flight time

9h 20m

Direct flights

None
The best one-way flight to San Juan Luis Munoz Marin Intl Airport from Seattle in the past 72 hours is $160. The best round-trip flight deal from Seattle to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is $320.
The fastest flight from Seattle to San Juan Luis Munoz Marin Intl Airport takes 9h 20m
There are no direct flights from Seattle to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from Seattle to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

Frequently asked questions about flying from Seattle to San Juan Luis Munoz Marin Intl Airport

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

    San Juan Luis Munoz Marin Intl is 3726.9 mi away from Seattle/Tacoma Intl. By plane, this route typically takes 9h 20m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to San Juan Luis Munoz Marin Intl Airport are updated daily.

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

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

    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 Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

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

  • What is the most popular airline from Seattle to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Seattle to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Seattle to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $175Free CancellationRating
5.6
2,674 reviews
Search Frontier flights
JetBluePriceFrom $327Free CancellationRating
7.1
3,033 reviews
Search JetBlue flights
DeltaPriceFrom $342Free CancellationRating
7.8
8,504 reviews
Search Delta flights
United AirlinesPriceFrom $363Free CancellationRating
7.4
10,107 reviews
Search United Airlines flights
American AirlinesPriceFrom $373Free CancellationRating
7.1
11,948 reviews
Search American Airlines flights
Sun Country AirPriceFrom $454Free CancellationRating
6.7
318 reviews
Search Sun Country Air flights
SouthwestPriceFrom $454Free CancellationRating
8.0
4,219 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $587Free CancellationRating
7.9
12,811 reviews
Search Alaska Airlines flights

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Rio Grande
Humacao
Caguas
Bayamón

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Juan from Seattle.

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

momondo does allow users to show only those flights to San Juan from Seattle which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to San Juan from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to San Juan right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Juan, momondo offers a useful price alert feature which will track prices for flights to San Juan from Seattle and alert you when they change.

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