$76 Cheap Spirit Airlines flights Philadelphia (PHL) to Boston (BOS)

You can find affordable return Spirit Airlines flights from $131 from PHL to BOS by sorting your results from “Price (lowest to highest)” on Expedia. Or search for options from $76 for a one-way trip.**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.

Spirit Airlines flights to Boston tend to be more affordable in the off-peak months of January and February. Whether you’re in search of a one-way or a return ticket, you could score a better deal then.

Search for affordable Spirit Airlines flights from Philadelphia Intl. Airport (PHL) to Logan Intl. Airport (BOS) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the best day to book a domestic flight is generally Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.

Click on the “Nonstop” filter when browsing for direct Spirit Airlines flights from PHL to BOS. You can also compare other airlines offering the same nonstop route.

To find the earliest departures from PHL to BOS with Spirit Airlines, sort your results by “Morning” and “Early Morning.” Choosing an early flight generally means you’ll experience 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.

Spirit Airlines flights from Philadelphia Intl. Airport (PHL) to Boston arrive at Logan Intl. Airport (BOS). This is the main entry point here.

A rewarding loyalty program and the chance to rack up points through Free Spirit are the start of the reasons to travel from PHL to BOS with Spirit Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* in addition to Spirit Airlines’s loyalty program earnings. It’s yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of making your booking, but your airline may charge you after that. For more information about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to adjust your plans without being charged, tick the “No cancel fee” or “Changes included” filter when planning your next escape.