Cheap Flights from Seattle / Tacoma International to San Juan

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Flight deals from Seattle / Tacoma International to San Juan

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International to San Juan? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle / Tacoma International to San Juan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to San Juan flights are currently cheapest in February.

Alternative Seattle / Tacoma International to San Juan routes

Looking for the cheapest, fastest or easiest route from Seattle / Tacoma International to San Juan? You could fly into the following airports instead.

Seattle to San Juan: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 6,380
Cheapest month to flyFebruary

Finding cheap flights from Seattle / Tacoma International to San Juan: Frequently asked questions

There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
The best price we found for a return flight from Seattle / Tacoma International to San Juan is ج.م.‏ 12,567. 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 / Tacoma International to San Juan. But we found flights with one or more stops from ج.م.‏ 12,567.
As of January 2026, there are no flights flying from Seattle / Tacoma International to San Juan.
The cheapest month to fly from Seattle / Tacoma International to San Juan is usually January.
If you're flying from Seattle / Tacoma International Airport, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from ج.م.‏ 12,567.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to San Juan on Friday, 30 January 2026.
No airlines currently offer direct flights between Seattle / Tacoma International Airport and San Juan. 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 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.
In January, the average temperature is usually around 25°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
Currently, Frontier Airlines offers the cheapest flight tickets to San Juan.

Flying from Seattle-Tacoma International Airport (SEA) to San Juan: what you need to know

  • Seattle-Tacoma International Airport is located in Seattle. Based in the UTC-4 timezone, San Juan is three hours ahead of Seattle.

  • For stress-free travel, arrive at the airport two hours ahead of international flights and one hour before domestic departures. That way, you can comfortably board your SEA to San Juan flight.

  • Longer lines at security and check-in are likely if you're travelling during high season, so allow some extra wiggle room. A good rule for peak times? Get there up to four hours early for international flights and at least two hours for domestic departures.

  • Stopovers are the perfect opportunity to break up your journey and perhaps even visit a new city. When searching for flight tickets from SEA to San Juan, deselect the 'Direct flights only' box to see where you can stop along the way. Popular options include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Denver International Airport (DEN)

    • Orlando International Airport (MCO)

  • SEA is around 18 kilometres from central Seattle. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 20 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the journey time to be around 55 minutes.

  • Booked an early flight from Seattle-Tacoma International Airport to San Juan? Avoid the hassle of rushing to the terminal (and sneak in some extra snooze time) by choosing one of these hotels close to SEA:

  • Seattle-Tacoma International Airport gets top marks for on-time performance. 81.27% of flights that take off from SEA arrive at their destination without delay.

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to San Juan

  • ج.م.‏ 6,380 is currently the lowest price for a one-way Seattle-Tacoma International Airport to San Juan flight. Return flight tickets start at ج.م.‏ 12,567. These fares can change based on demand.

  • To pick up cheap flights from SEA to San Juan, book early. Airlines tend to offer lower fares when flights first go on sale.

  • The 'Whole month' tool will show you the cheapest tickets from Seattle-Tacoma International Airport to San Juan across the entire month. It's an easy way to find a bargain if your trip dates are flexible.

  • You don't need to check in daily to find out if fares have dropped when you create a Price Alert. We'll update you as soon as there's an updated deal for cheap flights from SEA to San Juan.

  • Tailor your flights with filters. Choose your ideal departure and arrival times, airlines and total journey duration. You can also sort the results by 'Cheapest,' 'Best' or 'Fastest' flights from Seattle-Tacoma International Airport to San Juan.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • Luis Munoz Marin International Airport (SJU) to the centre of San Juan takes about 10 minutes to reach by car. The centre is roughly 8 kilometres away.

  • Getting there on public transport will take you around 55 minutes.

  • If you're coming in on a late flight from Seattle-Tacoma International Airport to San Juan, few things beat the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and snoozing soon after at one of these hotels near SJU:

  • Get on the fast track to adventure by picking up a Luis Munoz Marin International Airport rental car. Grab a set of wheels from Sixt, Ace Rent a Car or U-Save and explore beyond San Juan's usual tourist stops.

  • Booking your vehicle from Luis Munoz Marin International Airport about two weeks before your flight from SEA to San Juan can help you lock in the best possible rate.

Fernando Luis Ribas Dominicci Airport (SIG)

  • Fernando Luis Ribas Dominicci Airport (SIG) is about 8 kilometres from central San Juan. Once you've disembarked your flight from Seattle-Tacoma International Airport to San Juan, it'll take you around 15 minutes to reach the heart of the city in a cab or ride-share.

  • If you travel by public transport, you'll reach the centre in 1 hour or so.

  • Place the 'Do not disturb' sign on your door and rest at a hotel close to SIG. Here are a few options where you can settle in after your SEA to San Juan flight:

Best time to go to San Juan

  • Carefully consider your travel dates before locking in your flight from Seattle-Tacoma International Airport to San Juan. The city comes alive in peak season, but hotel prices are usually higher and major attractions can be busy. Plan your trip to San Juan in the off-season for a more relaxed vibe.

  • The warmest month in San Juan is September, with temperatures ranging between 23ºC and 33ºC. Book your Seattle-Tacoma International Airport to San Juan flight ticket then if this is the type of weather you enjoy.

  • February sees average temperatures of between 20ºC and 28ºC. Search for a cheap ticket from SEA to San Juan around that time if you want to travel in cooler conditions.

More about San Juan

  • After booking your flight from Seattle-Tacoma International Airport to San Juan, choose a hotel that puts you where you want to be. Make one of these accommodation options your base for exploring San Juan:

  • There are so many things to see and do in this city it can be hard to know where to start. La Garita del morro de san juan bahia, Castillo San Felipe del Morro and Fortaleza Street are top sights which should be on every San Juan itinerary.

Explore more of Puerto Rico

  • San Juan has its own special appeal, but there are so many other parts of Puerto Rico you should also see. About 113 kilometres west of San Juan, a trip to Aguadilla will fill your itinerary to the brim. Don't miss top attractions like El Parterre, Aguadilla Ice Skating Arena and Bandera de los Reyes Magos.

  • If you're looking to explore another corner of Puerto Rico, consider Isabela, about 105 kilometres west of San Juan. Amarillo Mango, Urb. Llanos Piscina Park and Noches de Artesania are key highlights.

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