$100 Cheap Frontier Airlines flights San Antonio (SAT) to Philadelphia (PHL)

You can discover cheap round-trip Frontier Airlines flights from $188 from SAT to PHL by sorting your results from “Price (lowest to highest)” on Expedia. Or search for deals from $100 for a one-way journey.**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.

Browse for round-trip or one-way flights to Philadelphia in January or February. You could find a cheap fare with Frontier Airlines during these off-season months.

For cheap Frontier Airlines fares from San Antonio Intl. Airport (SAT) to Philadelphia Intl. Airport (PHL), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect the cost. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**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 figure out if there’s a direct journey from SAT to PHL with Frontier Airlines or other airlines, use our “Nonstop” filter when looking for tickets.

Find Frontier Airlines’s earliest flights from SAT to PHL by using the “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures are also 20% less likely to be canceled.**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.

Philadelphia Intl. Airport (PHL) is the primary Philadelphia gateway for Frontier Airlines flights from San Antonio Intl. Airport (SAT).

Travel from SAT to PHL with Frontier Airlines and you’ll enjoy a range of perks including a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you can also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee typically applies if you change or cancel your flight more than 24 hours after it’s confirmed. To secure plane tickets with more flexibility, select our “Changes included” or “No cancel fee” filter while looking for flights. For additional information on canceling or changing your reservation, head to “Trips,” select your flight and tick “Manage Booking.”