$63 Cheap Spirit Airlines flights San Juan (SJU) to Boston (BOS)

Scoring cheap one-way Spirit Airlines flights from SJU to BOS from $63 on Expedia is a cinch — just filter by “Price (lowest to highest).” Or check out our affordable return fares from $142 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for round-trip or one-way flights to Boston in January or February. You could find lower fares with Spirit Airlines during these off-season months.

To find affordable flights from SJU to BOS with Spirit Airlines, begin your search about one month before your intended departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another good tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To see if there’s a direct route from SJU to BOS with Spirit Airlines or another airline, check the “Nonstop” box when searching for flights.

Find Spirit Airlines’s earliest flights from SJU to BOS by checking the “Morning” and “Early Morning” filters. Not only will you get to your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Logan Intl. Airport (BOS) is the primary Boston hub for Spirit Airlines flights from Luis Munoz Marin Intl. Airport (SJU).

Travel from SJU to BOS with Spirit Airlines and you’ll enjoy a host of benefits starting with a rewarding loyalty program. When you book through Expedia as a Free Spirit and One Key™ member, you could also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making your booking, but your airline may charge a fee after that time. For more information about altering your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to adjust your plans without additional charges, tick the “Changes included” or “No cancel fee” filter when planning your trip.