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Luis Munoz Marin Intl

$190+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Aug 8 — Aug 151
Sat 8/8
Sat 8/15
1 adult, Economy
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Cheap 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 July 9, 2026.

This Southwest deal was found by Cheapflights users on 7/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:15 am
SEA
-
SJU
2 stops13h 55m
Southwest
Tue 9/158:20 am
SJU
-
SEA
2 stops12h 35m
Southwest
Deal found 7/8$450
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:45 pm
SEA
-
SJU
2 stops16h 35m
Delta
Sat 12/127:15 am
SJU
-
SEA
2 stops15h 15m
Delta
Deal found 7/8$464
This American Airlines deal was found by Cheapflights users on 7/8. 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.
Sat 8/225:10 am
SEA
-
SJU
1 stop15h 33m
American Airlines
Sat 8/297:03 am
SJU
-
SEA
1 stop18h 53m
American Airlines
Deal found 7/8$465
This American Airlines deal was found by Cheapflights users on 7/8. 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 9/26:25 am
SEA
-
SJU
1 stop14h 34m
American Airlines
Tue 9/86:00 am
SJU
-
SEA
1 stop21h 20m
American Airlines
Deal found 7/8$469
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:40 pm
SEA
-
SJU
1 stop12h 54m
JetBlue
Sat 10/1710:30 am
SJU
-
SEA
1 stop13h 45m
JetBlue
Deal found 7/8$472
This JetBlue deal was found by Cheapflights users on 7/7. 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.
Sun 10/49:40 pm
SEA
-
SJU
1 stop12h 54m
JetBlue
Fri 10/1610:30 am
SJU
-
SEA
1 stop13h 45m
JetBlue
Deal found 7/7$475
This Southwest deal was found by Cheapflights users on 7/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:10 am
SEA
-
SJU
2 stops11h 50m
Southwest
Mon 8/316:30 am
SJU
-
SEA
2 stops14h 05m
Southwest
Deal found 7/8$477
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Fri 9/47:35 pm
SEA
-
SJU
2 stops13h 59m
United Airlines
Sun 9/61:00 am
SJU
-
SEA
1 stop13h 03m
United Airlines
Deal found 7/8$484
This American Airlines deal was found by Cheapflights users on 7/6. 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 9/711:16 pm
SEA
-
SJU
2 stops13h 55m
American Airlines
Sun 9/204:38 pm
SJU
-
SEA
1 stop10h 14m
American Airlines
Deal found 7/6$489
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:59 pm
SEA
-
SJU
1 stop13h 39m
Delta
Wed 9/27:30 am
SJU
-
SEA
1 stop15h 50m
Delta
Deal found 7/8$501
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:15 pm
SEA
-
SJU
1 stop10h 13m
JetBlue
Thu 10/151:00 pm
SJU
-
SEA
1 stop11h 15m
JetBlue
Deal found 7/8$506
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Wed 12/27:00 am
SEA
-
SJU
1 stop10h 00m
United Airlines
Mon 12/78:30 am
SJU
-
SEA
2 stops14h 29m
United Airlines
Deal found 7/8$508

Find 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 July 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$450
(Southwest)

One-way from

$190
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$707
Provider with most accurate pricing for Seattle/Tacoma Intl-San Juan Luis Munoz Marin Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-San Juan Luis Munoz Marin Intl flights.
Search Deals
From Seattle/Tacoma Intl to San Juan Luis Munoz Marin Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to San Juan Luis Munoz Marin Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 9, 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 - SJU

SEASJU

Seattle/Tacoma Intl

Thu 9/10

5:15 am-10:10 pm

2 stops13h 55m

San Juan Luis Munoz Marin Intl

Tue 9/15

8:20 am-5:55 pm

2 stops12h 35m

$450

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/23

7:15 am-11:48 pm

1 stop13h 33m

San Juan Luis Munoz Marin Intl

Sat 10/3

7:30 am-6:30 pm

1 stop14h 00m

$464

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 8/17

11:59 pm-3:42 pm

1 stop12h 43m

San Juan Luis Munoz Marin Intl

Fri 8/28

7:00 am-2:52 pm

1 stop10h 52m

$464

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 8/21

7:25 pm-10:50 am

2 stops12h 25m

San Juan Luis Munoz Marin Intl

Sun 8/30

5:30 am-5:05 pm

2 stops14h 35m

$464

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 9/10

11:00 pm-2:44 pm

1 stop12h 44m

San Juan Luis Munoz Marin Intl

Tue 9/15

7:00 am-2:52 pm

1 stop10h 52m

$464

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 8/23

11:59 pm-3:42 pm

1 stop12h 43m

San Juan Luis Munoz Marin Intl

Fri 8/28

7:00 am-8:43 pm

2 stops16h 43m

$554

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 9/2

6:15 pm-12:54 pm

2 stops15h 39m

San Juan Luis Munoz Marin Intl

Sat 9/5

1:00 am-4:07 pm

2 stops18h 07m

$554
Quickest round-trip

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 10/5

11:14 pm-12:34 pm

1 stop10h 20m

San Juan Luis Munoz Marin Intl

Mon 10/12

2:55 pm-10:45 pm

1 stop10h 50m

$554

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 8/23

11:59 pm-3:42 pm

1 stop12h 43m

San Juan Luis Munoz Marin Intl

Tue 9/8

1:00 am-3:45 pm

2 stops17h 45m

$554

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 8/23

7:50 pm-11:46 am

2 stops12h 56m

San Juan Luis Munoz Marin Intl

Fri 8/28

1:19 pm-11:59 pm

2 stops13h 40m

$570

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/7

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Luis Munoz Marin Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Luis Munoz Marin Intl in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-San Juan Luis Munoz Marin Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

Booking 87 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, October is the cheapest month in which you can book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport (average of $454). Flying from Seattle to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $778). 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.

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 July 9, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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.
Southwest
7.9
Good
4,249 reviews

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
7.9
Good
4,249 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Delta
7.8
Good
8,450 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
United Airlines
7.4
Good
9,951 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.1
Good
11,785 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
JetBlue
7.1
Good
3,014 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

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 8 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 12h 43m. Fly via Southwest, Delta, or United Airlines to get the fastest option. Seattle and San Juan Luis Munoz Marin Intl Airport are separated by a distance of 3723 mi. This flight may include one or multiple stops.

  • 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 $175. Additional round-trip tickets that might be worth considering are offered by JetBlue and Delta, with the lowest prices starting at $327 and $342, respectively. Frontier is 69% 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 ($161), American Airlines ($182), and Delta ($192).

  • 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. Miami 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 Reunion Tower. Travelers on a layover in Dallas can visit American Airlines Center, Dallas World Aquarium, and Reunion Tower, by traveling 15.0 mi, 15.5 mi, and 15.6 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 $57 per day.

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

    Miami travelers tend to visit Kaseya Center, Bayfront Park, and Bayside Marketplace more than any other notable places. Travelers on a layover in Miami can visit Kaseya Center, Bayfront Park, and Bayside Marketplace, by traveling 6.2 mi, 6.4 mi, and 6.4 mi, respectively after landing at Miami. Travelers can book a car rental at Miami for about $25 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 Charlotte.

  • 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, October is the cheapest month in which you can book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport (average of $454). Flying from Seattle to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $778). 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
Fajardo
Luquillo
Rio Grande
Dorado
Humacao
Bayamón

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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 8 airlines flying from Seattle to Luis Munoz Marin Intl

Discover the top 8 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 July 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$175Average$344FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$327Average$451FlexibilityNo cancel feeOn-time62%
DeltaCheapest$342Average$644FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$363Average$551FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$366Average$581FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$454Average$828FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$474Average$610FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$587Average$678FlexibilityNo cancel feeOn-time75%

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