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Luis Munoz Marin Intl

$166+ Cheap flights from Seattle (SEA) to Luis Munoz Marin Intl (SJU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Juan Luis Munoz Marin Intl are usually found in October or January, booked 55 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Seattle to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Luis Munoz Marin Intl (SJU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$363
(United Airlines)

One-way from

$166
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$474
From Seattle/Tacoma Intl to San Juan Luis Munoz Marin Intl
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One-way flight from Seattle/Tacoma Intl to San Juan Luis Munoz Marin Intl
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Highest demand for flights based on searches. 3% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Luis Munoz Marin Intl

Cheapest flights from Seattle to Luis Munoz Marin Intl
Explore the most affordable flight options available from Seattle to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:37 pmSEA - SJU
2 stops13h 57mUnited Airlines
Wed 10/221:30 pmSJU - SEA
1 stop11h 47mUnited Airlines
Deal found 9/9$363
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:37 pmSEA - SJU
2 stops13h 57mUnited Airlines
Thu 10/21:05 amSJU - SEA
2 stops13h 26mUnited Airlines
Deal found 9/9$368
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/211:59 pmSEA - SJU
1 stop18h 25mJetBlue
Tue 10/76:00 amSJU - SEA
1 stop19h 36mJetBlue
Deal found 9/10$370
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/138:49 pmSEA - SJU
1 stop12h 55mAmerican Airlines
Sun 10/197:00 amSJU - SEA
1 stop19h 35mAmerican Airlines
Deal found 9/9$371
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:00 amSEA - SJU
1 stop9h 30mUnited Airlines
Tue 10/287:30 amSJU - SEA
2 stops17h 03mUnited Airlines
Deal found 9/9$373
This JetBlue deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2311:59 pmSEA - SJU
1 stop13h 44mJetBlue
Sat 10/41:29 pmSJU - SEA
1 stop11h 55mJetBlue
Deal found 9/9$374
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:51 pmSEA - SJU
1 stop18h 24mAmerican Airlines
Tue 10/77:00 amSJU - SEA
2 stops12h 54mAmerican Airlines
Deal found 9/9$380
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1011:40 pmSEA - SJU
1 stop22h 17mJetBlue
Wed 10/156:00 amSJU - SEA
1 stop19h 21mJetBlue
Deal found 9/10$382
This JetBlue deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2311:59 pmSEA - SJU
1 stop13h 44mJetBlue
Fri 10/31:29 pmSJU - SEA
1 stop11h 55mJetBlue
Deal found 9/9$385
This JetBlue deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:59 pmSEA - SJU
1 stop11h 55mJetBlue
Sat 10/111:25 pmSJU - SEA
1 stop12h 11mJetBlue
Deal found 9/9$391

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Luis Munoz Marin Intl 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
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

Seattle

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 10/15

5:00 am-5:30 pm

1 stop9h 30m

San Juan Luis Munoz Marin Intl

Tue 11/11

2:05 am-1:54 pm

2 stops15h 49m

$363

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 9/30

5:31 pm-12:00 pm

2 stops15h 29m

San Juan Luis Munoz Marin Intl

Fri 10/3

2:00 pm-9:34 pm

1 stop10h 34m

$363

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 11/1

11:59 pm-3:40 pm

1 stop12h 41m

San Juan Luis Munoz Marin Intl

Fri 11/7

2:05 am-11:11 am

1 stop13h 06m

$380

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 10/3

6:55 pm-12:00 pm

2 stops14h 05m

San Juan Luis Munoz Marin Intl

Wed 10/8

1:05 am-10:47 am

1 stop12h 42m

$453

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 10/4

10:54 pm-1:45 pm

1 stop11h 51m

San Juan Luis Munoz Marin Intl

Fri 10/10

1:05 am-10:27 am

1 stop12h 22m

$453

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 10/7

10:45 pm-1:45 pm

1 stop12h 00m

San Juan Luis Munoz Marin Intl

Tue 10/14

1:05 am-2:24 pm

2 stops16h 19m

$453

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 10/25

10:54 pm-1:40 pm

1 stop11h 46m

San Juan Luis Munoz Marin Intl

Tue 11/4

2:05 am-11:11 am

1 stop13h 06m

$453

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 10/6

11:40 pm-4:42 pm

1 stop14h 02m

$171

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 10/19

7:28 pm-1:44 am

3 stops51h 16m

$172

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 10/6

11:56 pm-10:10 pm

1 stop19h 14m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 13 results
1
2

Best time to book a flight from Seattle to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to San Juan Luis Munoz Marin Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Luis Munoz Marin Intl. Price data was last updated on August 29, 2025.

Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to San Juan Luis Munoz Marin Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Seattle to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SJU?

Find hourly flight availability from Seattle to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s typically best to fly out from Seattle to San Juan Luis Munoz Marin Intl Airport at noon. Doing so could potentially save you 20% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Seattle to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Luis Munoz Marin Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Seattle to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Luis Munoz Marin Intl. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Seattle to San Juan Luis Munoz Marin Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
JetBlue
7.2
Good
2,913 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Spirit Airlines
6.3
Okay
8,023 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Luis Munoz Marin Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to San Juan Luis Munoz Marin Intl?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to San Juan Luis Munoz Marin Intl. On average, Seattle/Tacoma Intl has 0 outbound flights to San Juan Luis Munoz Marin Intl per day from 9 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to San Juan Luis Munoz Marin Intl Airport?

    There are many flights that can get you from Seattle to San Juan Luis Munoz Marin Intl Airport in 9h 30m. Fly via United Airlines to get the fastest option. Seattle and San Juan Luis Munoz Marin Intl Airport are separated by a distance of 3723 mi.

  • What are the cheapest airlines flying from Seattle to San Juan Luis Munoz Marin Intl Airport round-trip?

    Flying on Frontier is currently your cheapest option to San Juan Luis Munoz Marin Intl Airport, with prices starting at $194. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and JetBlue, with the lowest prices starting at $233 and $326, respectively. Frontier is 67% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to San Juan Luis Munoz Marin Intl Airport one-way?

    The cheapest airlines for a one-way flight from Seattle to San Juan Luis Munoz Marin Intl Airport are JetBlue ($171), American Airlines ($182), and Delta ($182).

  • Where are the most common layover locations when flying from Seattle to San Juan Luis Munoz Marin Intl Airport?

    Of the flights from Seattle to San Juan Luis Munoz Marin Intl Airport that have layovers, most of them stop in Dallas. Charlotte follows Dallas in terms of the most common layover location on Seattle to San Juan Luis Munoz Marin Intl Airport flights.

  • What are some popular things to do or see while on a layover in Dallas?

    The majority of Dallas visitors spend their time at American Airlines Center, Dallas World Aquarium, and Dos Equis Pavilion. Travelers on a layover in Dallas can visit American Airlines Center, Dallas World Aquarium, and Dos Equis Pavilion, by traveling 15.0 mi, 15.5 mi, and 18.3 mi, respectively after landing at Dallas/Fort Worth. Those looking to explore during their layover in Dallas can rent a car from Dallas/Fort Worth for about $50 per day.

  • What are some popular points of interest to see during a layover in Charlotte?

    Charlotte travelers tend to visit Carowind, Mint Museum Uptown, and NASCAR Hall of Fame more than any other notable places. Travelers on a layover in Charlotte can visit Carowind, Mint Museum Uptown, and NASCAR Hall of Fame, by traveling 8.2 mi, 5.4 mi, and 5.7 mi, respectively after landing at Charlotte Douglas. Travelers can book a car rental at Charlotte Douglas for about $44 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Seattle to San Juan Luis Munoz Marin Intl Airport flights?

    Of the flights from Seattle to San Juan Luis Munoz Marin Intl Airport that have layovers, the fewest flights stop in Atlanta. Atlanta is followed by Miami in terms of the least popular layover location on flights from Seattle to San Juan Luis Munoz Marin Intl Airport.

  • Can I find deals for flights from Seattle to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Seattle to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Luis Munoz Marin Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Luis Munoz Marin Intl.

  • Can I find deals for business class flights from Seattle to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Seattle to Luis Munoz Marin Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Seattle to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Dorado
Fajardo
Rio Grande
Luquillo
Humacao

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Alternative routes for Seattle to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Luis Munoz Marin Intl flights
Spokane to Luis Munoz Marin Intl flights
Pasco to Luis Munoz Marin Intl flights

Top 9 airlines flying from Seattle to Luis Munoz Marin Intl

Discover the top 9 airlines that operate flights from Seattle to Luis Munoz Marin Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$194Average$796FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$233Average$341FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$326Average$565FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$352Average$586FlexibilityNo cancel feeOn-time71%
DeltaCheapest$360Average$732FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$364Average$578FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$447Average$818FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$521Average$695FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$678Average$880FlexibilityNo cancel feeOn-time75%

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