Cheap flights from San Diego to Philadelphia from $159

The cheapest month to fly to Philadelphia from San Diego is in February. Flight prices, which tend to average around $421, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Philadelphia, with average flight prices from San Diego averaging around $433.

The cheapest day to depart from San Diego to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $526. On the other hand, Sunday is the most expensive day to depart from San Diego because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $734.

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from San Diego to Philadelphia in the evening for as low as $507. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $574.

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

You are more likely to see cheaper flights to Philadelphia from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $487 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from San Diego for as low as $444 on momondo.

There are 4 cabin classes available to choose from on San Diego to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier and Southwest are the most popular carriers operating from San Diego to Philadelphia

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Philadelphia from San Diego according to our data. American Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 7 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Atlanta (ATL) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $416.

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 44m.

Atlanta (ATL) has the shortest average layover time for this route: 1h 17m.

As of September 2026, there are 6 flights per day flying from San Diego to Philadelphia. The most common time of day flights depart is 6:00AM, with 100% of flights taking off at noon.

As of September 2026, 42 flights take off from San Diego and land in Philadelphia each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.