$171 Cheap American Airlines flights Philadelphia (PHL) to San Antonio (SAT)

Finding cheap one-way American Airlines flights from PHL to SAT from $171 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $341 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.

January is one of the least expensive months to fly to San Antonio with American Airlines. You could also find excellent prices on return and one-way fares in September.

To find cheap American Airlines fares from Philadelphia Intl. Airport (PHL) to San Antonio Intl. Airport (SAT), start searching one to three months before your planned departure. Reserving 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 impact the cost. Sunday is generally 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 route from PHL to SAT with American Airlines or other airlines, use our “Nonstop” filter when browsing for flights.

Filter your results by “Early Morning” and “Morning” to see the earliest departures from PHL to SAT. Leaving early means you’re 20% less likely to experience 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.

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

Changes are generally free within 24 hours of booking, but your airline may charge a fee after that time. For more information about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to make changes without additional costs, apply the “Changes included” and “No cancel fee” filters when organizing your trip.