Cheap Flights from Seattle (SEA) to San Juan (SIG)

Popular airlines from Seattle-Tacoma International Airport (SEA) to San Juan (SIG-Fernando Luis Ribas Dominicci)

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Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $579
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $579
Flights from Seattle (SEA) to San Juan (SIG)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Fernando Luis Ribas Dominicci
Distance
3719 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 . 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 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

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG) cost?
Discover the latest flight deals from SEA to SIG by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to SIG?
The cheapest flights from SEA to SIG are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to SIG?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to SIG. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG)?
There aren't any daily nonstop flights departing from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from SEA to SIG?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG)?
Choose a flight from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG) last-minute?
Last-minute bookings from SEA to SIG are generally more expensive. To lock in the lowest rates, start looking for flights as soon as possible. That said, if you're flexible with your travel dates, you may land a cheap fare right before you leave.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Fernando Luis Ribas Dominicci Airport (SIG)?
If you booked your SEA to SIG flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more information.

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*Available to One Key members.