299 € Cheap Flights from Seattle to San Juan Luis Munoz Marin

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Flight deals from Seattle to San Juan Luis Munoz Marin Airport

Looking for a cheap last-minute deal or the best return flight from Seattle to San Juan Luis Munoz Marin Airport? If you want to travel next month, return fares start from 299 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to San Juan Luis Munoz Marin

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to San Juan Luis Munoz Marin flights are currently cheapest in April.

Seattle to San Juan: Flight information

The things to know before you go.
Cheapest flight found299 €
Cheapest month to flyApril

Finding cheap flights from Seattle to San Juan Luis Munoz Marin: Frequently asked questions

The best price we found for a return flight from Seattle to San Juan Luis Munoz Marin is 299 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle to San Juan Luis Munoz Marin. But we found flights with one stop from 299 €.
As of March 2026, there are no flights flying from Seattle to San Juan Luis Munoz Marin.
The cheapest month to fly from Seattle to San Juan Luis Munoz Marin is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to San Juan Luis Munoz Marin Airport on Tuesday, 14 April 2026.
No airlines currently offer direct flights between Seattle and San Juan Luis Munoz Marin Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Juan Luis Munoz Marin but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Juan is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to San Juan Luis Munoz Marin is Frontier Airlines .

Flying from Seattle to Luis Munoz Marin International Airport (SJU): What you need to know

  • There are a couple of airports you can fly out of in Seattle. Explore your options departing from Seattle-Tacoma International Airport (SEA) or Lake Union Sea Plane Base Airport (LKE) when searching for a flight from Seattle to Luis Munoz Marin International Airport (SJU).

  • The timezone in San Juan is UTC-4, which is three hours ahead of Seattle. Luis Munoz Marin International Airport is located in San Juan.

  • To ensure you get on your flight from Seattle to SJU, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and an hour before domestic flights is the standard rule.

  • Heading off during a peak period like school or public holidays? Expect longer queues at check-in and security. To give yourself peace of mind, arrive up to four hours before international flights and two hours before domestic departures.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • We make it a breeze to find cheap flights from Seattle to SJU with a stopover. To explore the options leaving from Seattle-Tacoma International Airport (SEA), deselect 'Direct flights only.' Next, select a flight with a stop long enough to tour your chosen city. Popular stopovers between SEA and SJU include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Denver International Airport (DEN)

    • Orlando International Airport (MCO)

  • Located around 23 kilometres from the centre of Seattle, SEA can be reached in about 20 minutes by car, depending on traffic. The journey on public transport takes roughly 55 minutes.

  • Have an early flight from Seattle to Luis Munoz Marin International Airport? Avoid the last-minute rush to the terminal (and enjoy a little extra shut-eye) by picking one of these stays close to Seattle-Tacoma International Airport:

  • Seattle-Tacoma International Airport scores top marks for on-time performance. 81.27% of flights that take off from SEA arrive at their destination on time.

Lake Union Sea Plane Base Airport (LKE)

About Luis Munoz Marin International Airport (SJU)

Getting from Luis Munoz Marin International Airport (SJU) to central San Juan

  • Central San Juan is around 6 kilometres from Luis Munoz Marin International Airport. Travel times by cab or car hire will vary based on time of day, so do a little research before your trip.

  • Travelling on public transport takes around 55 minutes.

How to find the cheapest flights from Seattle to Luis Munoz Marin International Airport (SJU)

  • 147 € is the best price for a one-way ticket from Seattle to Luis Munoz Marin International Airport. Return flights start at 299 €. These prices may change depending on demand.

  • Booking early is often the key to scoring a cheap flight from Seattle to SJU. Prices tend to rise as demand increases, so the closer your departure date, the more expensive your ticket may be.

  • The 'Whole month' search tool will show you the cheapest Seattle to Luis Munoz Marin International Airport tickets across each month. It's an easy way to snap up a bargain if your plans aren't set in stone.

  • Locking in a cheap plane ticket from Seattle to SJU is easy with Price Alerts. Simply create one of these automatic alerts and we'll let you know when prices go down.

  • Find an affordable flight from Seattle to Luis Munoz Marin International Airport by using the search filters. Select your preferred departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Seattle to Luis Munoz Marin International Airport (SJU)

  • May is the quietest month for flights from Seattle to Luis Munoz Marin International Airport (SJU), while July is the most popular. Pick the best time to visit San Juan based on whether you want a lively atmosphere or a more laid-back vibe.

  • The warmest month in San Juan is September, with temperatures ranging between 23ºC (73ºF) and 33ºC (91ºF). Lock in your Seattle to SJU plane ticket then if that's your definition of good weather.

  • If you like cooler conditions, search for a cheap ticket from Seattle to Luis Munoz Marin International Airport in February when temperatures are between 20ºC (68ºF) and 28ºC (82ºF).

More about San Juan

  • After booking your flight from Seattle to Luis Munoz Marin International Airport, find a hotel that offers a good mix of location and comfort. Make one of these accommodation options your base for exploring San Juan:

  • All great journeys should include a little sightseeing. Balneario El Escambrón, Esperanza Beach and Escambron Green are essential stops on your San Juan itinerary.

Explore more of Puerto Rico

  • Aguadilla is just one of the many cities in Puerto Rico waiting to be explored after you've experienced San Juan. Around 121 kilometres away to the west, popular attractions include Silla Aguadilla, Bridges Surf Beach and Playa Rompe Olas.

  • Around 105 kilometres west of San Juan, Isabela is another favourite stop in Puerto Rico. Get a taste of what this destination has to offer at Shore Island Beach, Guajataca Forest Reserve and Middles Beach.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.