Cheap flights from Philadelphia to San Francisco from $145

If you aren’t able to travel to San Francisco during the month of September, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $379.

The cheapest day to depart from Philadelphia to San Francisco is on a Wednesday when prices can be found for as low as $422. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $663.

Our data shows that the cheapest Philadelphia to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $374. Flights in the afternoon are often more expensive with an average ticket price of $489.

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

You are more likely to see cheaper flights to San Francisco from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $397 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Philadelphia for as low as $316 on momondo.

There are 4 cabin classes available to choose from on Philadelphia to San Francisco 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 2% on your flight if you consider stops on a Philadelphia to San Francisco flight.

As of February 2026, prices for Philadelphia to San Francisco flights are approximately 24% cheaper when compared to flights at the same time last year.

Frontier is the most popular carrier operating from Philadelphia to San Francisco

United Airlines, American Airlines and Alaska Airlines are the top three most popular airlines that fly to San Francisco from Philadelphia according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 10 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Atlanta (ATL) was the most common stop: 71% of momondo users choosing 1-stop flights on this route connected there.

Flights via Boston (BOS) offer the lowest average round-trip price of $246.

Flights connecting via Las Vegas (LAS) have the shortest average one-way travel time: 8h 07m.

Las Vegas (LAS) has the shortest average layover time for this route: 1h 09m.

As of February 2026, 10 flights take off from Philadelphia and land in San Francisco each day. The most common flight departure time for this route is 3:00PM, with 36% of daily flights taking off in the afternoon.

The number of flights available between Philadelphia and San Francisco is 75 per week as of February 2026. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.