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Luis Munoz Marin Intl

$181+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 September or October, 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 June 12, 2025.

Round-trip from

$424
(FlightHub)

One-way from

$181
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$650
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. 4% potential increase in price ($25 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 June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/83:58 pmSEA - SJU
2 stops16h 34mSpirit Airlines
Fri 7/111:37 amSJU - SEA
2 stops17h 48mSpirit Airlines
Deal found 6/9$424
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/75:00 amSEA - SJU
1 stop9h 30mUnited Airlines
Wed 10/151:05 amSJU - SEA
1 stop12h 42mUnited Airlines
Deal found 6/12$434
This Southwest deal was found by Cheapflights users on 6/11. 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.
Tue 9/169:10 pmSEA - SJU
1 stop12h 35mSouthwest
Fri 9/198:15 amSJU - SEA
2 stops12h 45mSouthwest
Deal found 6/11$436
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2512:45 amSEA - SJU
2 stops11h 15mAmerican Airlines
Mon 9/16:00 amSJU - SEA
1 stop21h 14mAmerican Airlines
Deal found 6/10$451
This Frontier deal was found by Cheapflights users on 6/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/412:13 pmSEA - SJU
2 stops21h 15mFrontier
Wed 8/612:59 amSJU - SEA
2 stops16h 07mFrontier
Deal found 6/11$456
This eDestinos deal was found by Cheapflights users on 6/10. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:17 amSEA - SJU
3 stops38h 37mMultiple Airlines
Sat 8/306:55 pmSJU - SEA
3 stops30h 48mMultiple Airlines
Deal found 6/10$475
This JetBlue deal was found by Cheapflights users on 6/12. 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 9/1411:40 pmSEA - SJU
1 stop12h 14mJetBlue
Sun 9/2112:50 pmSJU - SEA
1 stop12h 20mJetBlue
Deal found 6/12$496
This Delta deal was found by Cheapflights users on 6/12. 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 9/2212:40 amSEA - SJU
2 stops18h 28mDelta
Tue 9/307:30 amSJU - SEA
1 stop15h 06mDelta
Deal found 6/12$528

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 June 12, 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

Tue 7/8

3:58 pm-11:32 am

2 stops16h 34m

San Juan Luis Munoz Marin Intl

Fri 7/11

1:37 am-4:25 pm

2 stops17h 48m

$424

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 10/7

5:00 am-5:30 pm

1 stop9h 30m

San Juan Luis Munoz Marin Intl

Wed 10/15

1:05 am-10:47 am

1 stop12h 42m

$434

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 9/16

9:10 pm-12:45 pm

1 stop12h 35m

San Juan Luis Munoz Marin Intl

Fri 9/19

8:15 am-6:00 pm

2 stops12h 45m

$436

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 8/25

12:45 am-3:00 pm

2 stops11h 15m

San Juan Luis Munoz Marin Intl

Mon 9/1

6:00 am-12:14 am

1 stop21h 14m

$451

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 8/4

12:13 pm-12:28 pm

2 stops21h 15m

San Juan Luis Munoz Marin Intl

Wed 8/6

12:59 am-2:06 pm

2 stops16h 07m

$456

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Fri 8/22

6:17 am-11:54 pm

3 stops38h 37m

San Juan Luis Munoz Marin Intl

Sat 8/30

6:55 pm-10:43 pm

3 stops30h 48m

$475

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 9/14

11:40 pm-2:54 pm

1 stop12h 14m

San Juan Luis Munoz Marin Intl

Sun 9/21

12:50 pm-10:10 pm

1 stop12h 20m

$496

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 9/22

12:40 am-10:08 pm

2 stops18h 28m

San Juan Luis Munoz Marin Intl

Tue 9/30

7:30 am-7:36 pm

1 stop15h 06m

$528

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 9/25

4:58 pm-4:46 pm

2 stops20h 48m

$181

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Thu 9/25

11:38 pm-3:52 pm

1 stop13h 14m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 18 results
1
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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 June 9, 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 June 12, 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.

Rainfall in Luis Munoz Marin Intl by month

Plan your trip to Luis Munoz Marin Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 2.2 in.

Temperature in Luis Munoz Marin Intl by month

Plan your trip to Luis Munoz Marin Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

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 June 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Seattle to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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.

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

    Flying on Spirit Airlines is currently your cheapest option to San Juan Luis Munoz Marin Intl Airport, with prices starting at $424. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $434 and $436, respectively. Spirit Airlines is 25% 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 Spirit Airlines ($181), American Airlines ($189), and JetBlue ($219).

  • 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 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 $61 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 $48 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.

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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.
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$194Average$792FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$233Average$341FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$286Average$562FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$330Average$567FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$339Average$564FlexibilityNo cancel feeOn-time69%
DeltaCheapest$413Average$729FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$447Average$885FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$466Average$637FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$490Average$815FlexibilityNo cancel feeOn-time75%

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