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Cheap flights from Philadelphia to San Francisco from £135

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SFO
6 Aug — 13 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Philadelphia to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to San Francisco
Explore the most affordable flight options available from Philadelphia to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 July 2026.

Thu 8/1006:00
PHL
-
SFO
Nonstop6h 03m
United Airlines
Tue 13/1023:20
SFO
-
PHL
Nonstop5h 29m
United Airlines
Deal found 3/7£261
Thu 13/818:00
PHL
-
SFO
Nonstop6h 09m
American Airlines
Thu 20/823:59
SFO
-
PHL
Nonstop5h 32m
American Airlines
Deal found 6/7£262
Sat 5/908:55
PHL
-
SFO
1 stop9h 55m
Southwest
Wed 9/1208:15
SFO
-
PHL
2 stops10h 05m
Southwest
Deal found 3/7£263
Thu 13/813:32
PHL
-
SFO
1 stop8h 41m
Frontier
Wed 19/800:29
SFO
-
PHL
2 stops12h 00m
Frontier
Deal found 6/7£263
Sat 26/918:34
PHL
-
SFO
Nonstop6h 03m
United Airlines
Sat 26/900:35
SFO
-
PHL
1 stop8h 50m
United Airlines
Deal found 2/7£264
Wed 28/1009:55
PHL
-
SFO
1 stop9h 20m
United Airlines
Sun 1/1123:35
SFO
-
PHL
Nonstop5h 19m
United Airlines
Deal found 3/7£266
Tue 18/815:05
PHL
-
SFO
2 stops9h 35m
Southwest
Sun 23/806:50
SFO
-
PHL
1 stop7h 15m
Southwest
Deal found 2/7£266
Thu 8/1006:00
PHL
-
SFO
Nonstop6h 03m
United Airlines
Sat 10/1000:45
SFO
-
PHL
1 stop8h 13m
United Airlines
Deal found 3/7£269
Wed 29/713:50
PHL
-
SFO
2 stops11h 25m
Southwest
Tue 4/809:35
SFO
-
PHL
2 stops11h 15m
Southwest
Deal found 2/7£270
Wed 19/807:55
PHL
-
SFO
2 stops9h 45m
Southwest
Thu 20/813:55
SFO
-
PHL
2 stops16h 45m
Southwest
Deal found 2/7£271
Mon 16/1105:05
PHL
-
SFO
1 stop9h 10m
Southwest
Sun 22/1112:10
SFO
-
PHL
1 stop8h 45m
Southwest
Deal found 2/7£272

Find flight deals from Philadelphia to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7 July 2026.

Round-trip from

£261

One-way from

£135

Popular in

June

Cheapest in

September

Average price

£318

Good round-trip deal

£957 or less
United Airlines
  • United Airlines
  • 8/10-13/10
  • Nonstop
  • 11h 32m total
  • Philadelphia to San Francisco
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Southwest
  • Southwest
  • 1/12
  • 1 total stop
  • 9h 10m total
  • Philadelphia to San Francisco
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£11 potential increase over avg. return price).
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Cheapest flight prices on average. 0% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
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Price to beat on a round-trip flight from Philadelphia to San Francisco.
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Cheapflights Fare Finder

 
Customise your flight search to find flights from Philadelphia to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 July 2026.
Use the filters below to find and compare flights from Philadelphia to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 15/10

06:00-09:03

Nonstop6h 03m

San Francisco

Tue 20/10

23:20-07:49

Nonstop5h 29m

£261

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Mon 10/8

06:00-08:58

Nonstop5h 58m

San Francisco

Mon 17/8

23:59-11:58

1 stop8h 59m

£269

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 1/10

07:05-13:11

1 stop9h 06m

San Francisco

Fri 9/10

22:59-08:45

1 stop6h 46m

£276

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sat 17/10

05:55-11:45

1 stop8h 50m

San Francisco

Tue 27/10

10:20-23:30

2 stops10h 10m

£280

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Tue 18/8

15:05-21:20

2 stops9h 15m

San Francisco

Sun 23/8

06:50-17:05

1 stop7h 15m

£280

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 12/8

15:05-21:20

2 stops9h 15m

San Francisco

Wed 19/8

10:40-23:50

2 stops10h 10m

£284

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Tue 28/7

09:35-22:15

2 stops15h 40m

San Francisco

Wed 12/8

06:50-20:55

2 stops11h 05m

£288

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sun 20/9

17:05-23:15

2 stops9h 10m

San Francisco

Tue 22/9

10:40-23:50

2 stops10h 10m

£288

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sun 18/10

06:20-10:45

1 stop7h 25m

San Francisco

Sun 25/10

06:55-19:50

2 stops9h 55m

£298

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 13/8

08:00-14:40

2 stops9h 40m

San Francisco

Thu 20/8

13:55-09:40

2 stops16h 45m

£306

Flights are sorted by cheapest return flights first.

Deals found on 6/7

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Philadelphia to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Philadelphia with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to San Francisco

How far ahead should I book a flight from Philadelphia to San Francisco?

The best time to book flights from Philadelphia to San Francisco is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Philadelphia to San Francisco?

Currently, September is the cheapest month in which you can book a flight from Philadelphia to San Francisco (average of £284). Flying from Philadelphia to San Francisco in June is currently the most expensive (average of £341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to SFO?

Find hourly flight availability from Philadelphia to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 July 2026.

When flying from Philadelphia to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from Philadelphia to San Francisco?

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Philadelphia to San Francisco flight route?

    This flight path from Philadelphia to San Francisco was viewed by 7 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Departing from Philadelphia to San Francisco will take you 6h 03m. The distance between Philadelphia and San Francisco is about 2513 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Philadelphia to San Francisco?

    The top 3 most reliable airlines when flying from Philadelphia to San Francisco are Air China (87%), Aer Lingus (81%) and ANA (78%).

  • What are the cheapest flights from Philadelphia to San Francisco?

    The cheapest flight price from Philadelphia to San Francisco is £950. On average you can expect to pay £957. The most popular route, (Philadelphia - San Francisco), can usually be booked for £235.

  • Can I find deals for flights from Philadelphia to San Francisco that include hotel bookings?

    Yes. In addition to deals on Philadelphia to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to San Francisco.

  • Can I find deals for business class flights from Philadelphia to San Francisco?

    Yes. Cheapflights offers flight deals from Philadelphia to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to San Francisco?

    Currently, September is the cheapest month in which you can book a flight from Philadelphia to San Francisco (average of £284). Flying from Philadelphia to San Francisco in June is currently the most expensive (average of £341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
San Bruno
Newark
Bodega Bay
South San Francisco
Sunnyvale

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How does Cheapflights help users find flights from Philadelphia to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Philadelphia to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to San Francisco?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Philadelphia to San Francisco for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Philadelphia to San Francisco with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Philadelphia to San Francisco, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Philadelphia to San Francisco become cheaper?

Yes, Cheapflights offers price alerts on Philadelphia to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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