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Cheap Flights from Seattle to San Juan (SEA-SJU)
Prices were available within the past 7 days and start at $142 for one-way flights and $297 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Luis Munoz Marin Intl. |
Airlines serving | Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, Spirit Airlines, United |
Roundtrip price | $297 |
Distance | 3724 mi |
Seattle to San Juan Flights
The cheapest times to fly from Seattle to San Juan
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to San Juan are during the month of May. You can find some of the cheapest flights from Seattle to San Juan with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Seattle to San Juan
Sunday is one of the best days to book for cheap flights from Seattle to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Seattle to San Juan
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $142 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
Frequently asked questions
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Flights
- Alaska Airlines Seattle (SEA) to Phoenix (PHX) flights
- JetBlue Airways Raleigh (RDU) to San Juan (SJU) flights
- JetBlue Airways Hartford (BDL) to San Juan (SJU) flights
- JetBlue Airways Boston (BOS) to San Juan (SJU) flights
- JetBlue Airways Chicago (ORD) to San Juan (SJU) flights
- JetBlue Airways Fort Lauderdale (FLL) to San Juan (SJU) flights
- JetBlue Airways Washington (DCA) to San Juan (SJU) flights
- JetBlue Airways Newark Liberty Intl. Airport (EWR) to San Juan (SJU) flights
- Spirit Airlines Detroit (DTW) to San Juan (SJU) flights
- JetBlue Airways Tampa (TPA) to San Juan (SJU) flights
- Spirit Airlines New York (LGA) to San Juan (SJU) flights
- Emirates Seattle (SEA) to Delhi (DEL) flights
- Alaska Airlines Seattle (SEA) to San Diego (SAN) flights
- Alaska Airlines Seattle (SEA) to Miami (MIA) flights
- Alaska Airlines Seattle (SEA) to Orange County (SNA) flights
- Asiana Airlines Seattle (SEA) to Manila (MNL) flights
- Alaska Airlines Seattle (SEA) to Newark Liberty Intl. Airport (EWR) flights
- Alaska Airlines Seattle (SEA) to Honolulu (HNL) flights
- Alaska Airlines Seattle (SEA) to Los Angeles (LAX) flights
- Alaska Airlines Seattle (SEA) to Puerto Vallarta (PVR) flights
- Flights from Seattle (SEA) to New York (JFK)
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- Flights from Seattle (SEA) to Phoenix (PHX)
- Flights from Hartford (BDL) to San Juan (SJU)
- Flights from Chicago (ORD) to San Juan (SJU)
- Flights from Detroit (DTW) to San Juan (SJU)
- Flights from Raleigh (RDU) to San Juan (SJU)
- Flights from Newark Liberty Intl. Airport (EWR) to San Juan (SJU)
- Flights from Washington (IAD) to San Juan (SJU)
- Flights from New York (LGA) to San Juan (SJU)
- Flights from Boston (BOS) to San Juan (SJU)
- Flights from Fort Lauderdale (FLL) to San Juan (SJU)
- Flights from Miami (MIA) to San Juan (SJU)
- Flights from Tampa (TPA) to San Juan (SJU)
- Flights from Washington (DCA) to San Juan (SJU)
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- Flights from Boston (BOS) to Miami (MIA)
- Flights from Seattle (SEA) to Miami (MIA)
- Flights from Seattle (SEA) to Orange County (SNA)
- Flights from Seattle (SEA) to Manila (MNL)
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- Flights from Seattle (SEA) to Newark Liberty Intl. Airport (EWR)
- Flights from Seattle (SEA) to Honolulu (HNL)
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- Flights from Las Vegas (LAS) to Los Angeles (LAX)
- Flights from Seattle (SEA) to Puerto Vallarta (PVR)
- Flights from Seattle (SEA) to Dallas (DAL)
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