Cheap flights from Philadelphia to San Antonio from $109

If you aren’t able to travel during the month of April, then book flights to San Antonio from Philadelphia during October instead. Flights to San Antonio in October, while not as cheap as those in April, still average around $404.

The cheapest day to depart on your flight to San Antonio is on a Friday when prices can be found for as low as $467. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Monday is $667.

According to our data, the cheapest time of day to fly to San Antonio is in the evening. momondo users have found flights departing from Philadelphia to San Antonio in the evening for as low as $219. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $518. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Philadelphia to San Antonio for the best Philadelphia - San Antonio flight prices

You are more likely to see cheaper flights to San Antonio from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $469 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Philadelphia for as low as $362 on momondo.

There is only 1 cabin class available to choose from on Philadelphia to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Philadelphia to San Antonio.

As of June 2026, prices for Philadelphia to San Antonio flights are approximately 49% more expensive when compared to flights at the same time last year.

Delta, Frontier, and American Airlines are the most popular carriers operating from Philadelphia to San Antonio

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to San Antonio from Philadelphia according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 6 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.

Historically, on average around 24% of flights between Philadelphia and San Antonio have experienced a delay on any given week. The average delay length over the past 12 months has been 187 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 23% of their flights experiencing any sort of delay.

Nashville (BNA) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Flights via Chicago (ORD) offer the lowest average round-trip price of $270.

Flights connecting via Nashville (BNA) have the shortest average one-way travel time: 5h 30m.

Nashville (BNA) has the shortest average layover time for this route: 0h 49m.

As of June 2026, 2 flights take off from Philadelphia and land in San Antonio each day. The most common flight departure time for this route is 5:00PM, with 46% of daily flights taking off in the afternoon.

The number of flights available between Philadelphia and San Antonio is 15 per week as of June 2026. The most frequent departure day is Mon, with 20% of weekly flights leaving on this day.