Cheap Flights from Philadelphia to San Francisco from US$122

Frequently Asked Questions

• What are the cheapest flights from Philadelphia to San Francisco (PHL-SFO)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$122 on Cheapest nonstop routes (e.g. PHL to SFO on Thu, Sep 24), while Frontier Airlines offers Cheapest nonstop round-trips from US$239 departing on Tue, Sep 15 and returning on Tue, Sep 22.

• Which airlines offer direct flights from Philadelphia to San Francisco?

  At the moment, you can catch a nonstop flight from Philadelphia to San Francisco with the following airlines, including: American Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Philadelphia to San Francisco?

  It takes about 6 hours 11 minutes to fly from Philadelphia to San Francisco.

• When is the best time to book flights from Philadelphia to San Francisco?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Philadelphia to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Philadelphia to San Francisco?

  Based on Trip.com data in the past 4 weeks, there is 38 flight per week flying from Philadelphia to San Francisco. You can check the weekly schedule for popular airlines on this route below: American Airlines: S/M/T/W/T/F/S -- AA1524 (08:49)

• How can I find the best deals on flights from Philadelphia to San Francisco?

  To find best deals on flights from Philadelphia to San Francisco, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Sep 24, with one-way flights priced at just US$122.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Philadelphia (PHL) to San Francisco (SFO) the cheapest?

  The cheapest months to fly from Philadelphia to San Francisco is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Philadelphia to San Francisco on?

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Philadelphia to San Francisco on September 26, 2026 with Frontier Airlines, with prices starting at US$120.

• Which airports fly into San Francisco from Philadelphia?

  You can land at any one of the following hubs in San Francisco: San Francisco International Airport (SFO). Flying from Philadelphia International Airport to San Francisco International Airport (PHL-SFO) is by far the most common option on this route.

• Is there any time difference between Philadelphia and San Francisco?

  The time difference between San Francisco and Philadelphia is 3h.

• How do I change or cancel my ticket from Philadelphia to San Francisco?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Philadelphia to San Francisco?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Philadelphia to San Francisco is US$265. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Philadelphia to San Francisco?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Philadelphia to San Francisco is US$484. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Philadelphia to San Francisco on Trip.com?

  Enter Philadelphia and San Francisco, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Philadelphia to San Francisco route?

  Frontier Airlinesare the most popular budget airlines flying from Philadelphia to San Francisco. Check baggage, seat and payment fees before comparing the final price.