Cheap flights from Philadelphia to San Antonio from $121

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 $410.

The cheapest day to depart on your flight to San Antonio is on a Saturday when prices can be found for as low as $484. 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 Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $687.

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 $329. 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 afternoon, with an average ticket price of $536. Departure times in the afternoon 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 $472 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 $333 on momondo.

There are 3 cabin classes 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.

You could potentially save up to 8% on your flight if you consider stops on a Philadelphia to San Antonio flight.

As of September 2026, prices for Philadelphia to San Antonio flights are approximately 37% cheaper when compared to flights at the same time last year.

Southwest and Delta 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 44% 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 25% 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 189 minutes.

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

Tuesday 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 25% of their flights experiencing any sort of delay.

Orlando (MCO) was the most common stop: 25% 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 Dallas (DFW) have the shortest average one-way travel time: 5h 47m.

Dallas (DFW) has the shortest average layover time for this route: 0h 48m.

As of September 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 100% of daily flights taking off in the afternoon.

The number of flights available between Philadelphia and San Antonio is 14 per week as of September 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.