£122 Cheap Flights from Philadelphia (PHL) to San Francisco (SFO)

View £122 flight on Wed, 27 May 2026Opens in a new window

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Popular airlines from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO)

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Cheap Flights from Philadelphia (PHL) to San Francisco (SFO)

Prices were available within the past 7 days and start at £122 for one-way flights and £273 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 15 May - Thu, 28 May
PHL
Philadelphia
SFO
San Francisco
£273 Return, found 6 days ago
£273
Return
found 6 days ago
Select Delta flight, departing Fri, 15 May from Philadelphia to San Francisco, returning Thu, 28 May, priced at £273 found 6 days ago
Delta
Wed, 20 May - Thu, 28 May
PHL
Philadelphia
SFO
San Francisco
£321 Return, found 6 days ago
£321
Return
found 6 days ago
Select Delta flight, departing Wed, 20 May from Philadelphia to San Francisco, returning Thu, 28 May, priced at £321 found 6 days ago
Delta
Thu, 21 May - Thu, 28 May
PHL
Philadelphia
SFO
San Francisco
£335 Return, found 6 days ago
£335
Return
found 6 days ago
Select Delta flight, departing Thu, 21 May from Philadelphia to San Francisco, returning Thu, 28 May, priced at £335 found 6 days ago
Alaska Airlines
Tue, 26 May - Tue, 2 Jun
PHL
Philadelphia
SFO
San Francisco
£343 Return, found 1 day ago
£343
Return
found 1 day ago
Select Alaska Airlines flight, departing Tue, 26 May from Philadelphia to San Francisco, returning Tue, 2 Jun, priced at £343 found 1 day ago
Alaska Airlines
Wed, 22 Jul - Wed, 29 Jul
PHL
Philadelphia
SFO
San Francisco
£351 Return, found 6 days ago
£351
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 22 Jul from Philadelphia to San Francisco, returning Wed, 29 Jul, priced at £351 found 6 days ago
American Airlines
Mon, 18 May - Sun, 31 May
PHL
Philadelphia
SFO
San Francisco
£352 Return, found 6 days ago
£352
Return
found 6 days ago
Select American Airlines flight, departing Mon, 18 May from Philadelphia to San Francisco, returning Sun, 31 May, priced at £352 found 6 days ago
Alaska Airlines
Wed, 22 Jul - Wed, 29 Jul
PHL
Philadelphia
SFO
San Francisco
£355 Return, found 6 days ago
£355
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 22 Jul from Philadelphia to San Francisco, returning Wed, 29 Jul, priced at £355 found 6 days ago
Alaska Airlines
Tue, 26 May - Tue, 2 Jun
PHL
Philadelphia
SFO
San Francisco
£358 Return, found 1 day ago
£358
Return
found 1 day ago
Select Alaska Airlines flight, departing Tue, 26 May from Philadelphia to San Francisco, returning Tue, 2 Jun, priced at £358 found 1 day ago
JetBlue Airways
Tue, 9 Jun - Tue, 16 Jun
PHL
Philadelphia
SFO
San Francisco
£405 Return, found 1 day ago
£405
Return
found 1 day ago
Select JetBlue Airways flight, departing Tue, 9 Jun from Philadelphia to San Francisco, returning Tue, 16 Jun, priced at £405 found 1 day ago
United
Mon, 18 May - Sun, 31 May
PHL
Philadelphia
SFO
San Francisco
£425 Return, found 6 days ago
£425
Return
found 6 days ago
Select United flight, departing Mon, 18 May from Philadelphia to San Francisco, returning Sun, 31 May, priced at £425 found 6 days ago

Frequently asked questions

How much does a flight from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) cost?
One-way flights typically cost between £691 and £1,113 and return flights often range between £691 and £1,113. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
September is typically the cheapest month to fly from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO), with average return fares of approximately £268. This is about 13% lower than the average price throughout the year. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO) include February and May.
Which airlines fly direct from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
Enter PHL to SFO and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
To find a cheap flight from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The best airline to fly with from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, UA typically offers the lowest fares. AA offers the most daily flights from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
When looking for the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.), it's a balance between price and popularity. Based on booking data from the past year, you'll find the cheapest flights in September or February, with average return fares around £268. While these months offer great value, they aren't the most popular times to travel, which means you might have fewer direct flight options. If you prioritize a wider selection of flights, January and July are the most popular months, though prices may be higher.
How many flights per day from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
There are approximately 8 nonstop flights per day from Philadelphia Intl. (PHL) to San Francisco Intl. (SFO). For even more choice, look at flights that include layovers, as there are around 159 connecting flights per day. Some common connection points include Seattle - Tacoma Intl. (SEA), O'Hare Intl. (ORD), and Denver Intl. (DEN).
What is the earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in January and February. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
If you're flying from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO), you'll typically find the most flights on a Thursday, with around 87 flights available. This gives you plenty of options to choose from. Major airlines on this route include American Airlines, United Airlines, and Delta Air Lines. Flight schedules are consistent throughout the week, so you'll have a good selection of flights regardless of the day you choose to travel.
What are the most popular departure times for flights from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The most popular departure times for flights from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO) are in the early morning, from 6am to 9am. About 36% of passengers prefer this time window. Many major carriers, including American Airlines and United Airlines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive at your destination with plenty of time left.
How long does it take to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
A nonstop flight from PHL to SFO typically takes around 6 hours 20 minutes, covering approximately 2,516 miles. Connecting flights on this route usually add 2 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
Select the "Business class" and "First class" filters when looking for PHL to SFO flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight with Expedia?
It's easy to earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Francisco from Philadelphia Intl. (PHL)?
If you're planning to travel to San Francisco from Philadelphia Intl. (PHL), you can fly directly into San Francisco Intl. (SFO) Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Midway Intl. (MDW), Denver Intl. (DEN) before reaching San Francisco. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) at the last minute?
Typically, booking a last minute flight from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package?
Securing a Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
If you booked your Philadelphia, PA (PHL-Philadelphia Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
San Francisco Intl.
Airlines serving
Alaska Airlines, JetBlue Airways
Return price
£272
Distance
4025 km
Average flight time
3 hours 53 mins

Book with confidence

Compare flights from Philadelphia to San Francisco easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Philadelphia to San Francisco. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to San Francisco Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Philadelphia Intl. to San Francisco Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Philadelphia Intl. (PHL) to San Francisco Intl. (SFO)

The easiest way to view the best deals on flights from Philadelphia to San Francisco today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Philadelphia Intl. to San Francisco Intl. start at just £273 and range up to £425.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Philadelphia and San Francisco
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Philadelphia to San Francisco flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Philadelphia Intl. to San Francisco Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Philadelphia to San Francisco easily and book with confidence

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*Available to Expedia members.