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Cheap flights from Philadelphia to San Francisco from £137

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SFO
17 May — 24 May1
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 17 April 2026.

Tue 12/507:22
PHL
-
SFO
1 stop9h 59m
Alaska Airlines
Tue 12/517:31
SFO
-
PHL
1 stop9h 09m
Alaska Airlines
Deal found 15/4£238
Thu 5/1117:15
PHL
-
SFO
1 stop9h 24m
Alaska Airlines
Tue 10/1108:15
SFO
-
PHL
1 stop18h 12m
Alaska Airlines
Deal found 15/4£243
Fri 15/506:00
PHL
-
SFO
Nonstop6h 18m
United Airlines
Mon 18/523:20
SFO
-
PHL
Nonstop5h 40m
United Airlines
Deal found 13/4£258
Fri 3/706:00
PHL
-
SFO
Nonstop5h 58m
United Airlines
Wed 8/717:30
SFO
-
PHL
1 stop9h 01m
United Airlines
Deal found 15/4£262
Fri 22/520:26
PHL
-
SFO
1 stop8h 16m
United Airlines
Wed 27/523:20
SFO
-
PHL
Nonstop5h 30m
United Airlines
Deal found 16/4£265
Fri 12/617:12
PHL
-
SFO
1 stop8h 37m
Delta
Sat 19/906:00
SFO
-
PHL
1 stop8h 22m
Delta
Deal found 13/4£272
Wed 30/906:00
PHL
-
SFO
2 stops9h 35m
Southwest
Tue 6/1011:40
SFO
-
PHL
1 stop7h 00m
Southwest
Deal found 15/4£276
Fri 3/705:00
PHL
-
SFO
2 stops9h 20m
Southwest
Tue 7/710:30
SFO
-
PHL
2 stops11h 30m
Southwest
Deal found 16/4£280
Wed 13/514:00
PHL
-
SFO
2 stops11h 05m
Southwest
Wed 20/522:40
SFO
-
PHL
1 stop11h 15m
Southwest
Deal found 13/4£280
Fri 1/518:06
PHL
-
SFO
Nonstop6h 18m
United Airlines
Sun 7/623:20
SFO
-
PHL
Nonstop5h 30m
United Airlines
Deal found 16/4£287
Sat 18/706:00
PHL
-
SFO
Nonstop5h 58m
United Airlines
Fri 31/717:30
SFO
-
PHL
1 stop9h 01m
United Airlines
Deal found 14/4£289

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 17 April 2026.

Round-trip from

£238

One-way from

£122

Popular in

November

Cheapest in

September

Average price

£294
Alaska Airlines
  • Alaska Airlines
  • 12/5-12/5
  • 2 total stops
  • 19h 08m total
  • Philadelphia to San Francisco
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 13/10
  • 1 total stop
  • 9h 48m total
  • Philadelphia to San Francisco
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£5 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 17 April 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

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 28/5

18:23-21:33

Nonstop6h 10m

San Francisco

Sun 31/5

16:48-01:29

Nonstop5h 41m

£258
Fastest return journey

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 19/8

09:25-12:28

Nonstop6h 03m

San Francisco

Sun 23/8

23:20-07:49

Nonstop5h 29m

£258

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 25/6

06:00-08:58

Nonstop5h 58m

San Francisco

Mon 29/6

16:48-01:29

Nonstop5h 41m

£258

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 7/8

18:23-21:33

Nonstop6h 10m

San Francisco

Wed 12/8

00:55-12:23

1 stop8h 28m

£265

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 2/10

13:00-19:05

1 stop9h 05m

San Francisco

Sun 11/10

23:20-07:49

Nonstop5h 29m

£265

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 22/7

09:25-12:34

Nonstop6h 09m

San Francisco

Wed 29/7

21:30-09:45

1 stop9h 15m

£265

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 2/10

18:13-21:31

Nonstop6h 18m

San Francisco

Mon 5/10

22:35-09:24

1 stop7h 49m

£265

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Thu 9/7

18:23-21:33

Nonstop6h 10m

San Francisco

Sun 12/7

22:35-09:45

1 stop8h 10m

£265

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Mon 5/10

12:40-20:05

2 stops10h 25m

San Francisco

Wed 14/10

06:50-21:40

2 stops11h 50m

£284

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Tue 16/6

18:40-00:10

1 stop8h 30m

San Francisco

Tue 23/6

12:10-01:00

2 stops9h 50m

£294

Flights are sorted by cheapest return flights first.

Deals found on 15/4

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?

Use this chart to determine the optimal time to book a return flight from Philadelphia to San Francisco. Price data was last updated on 10 April 2026.

The best time to book flights from Philadelphia to San Francisco is 83 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 £258). Flying from Philadelphia to San Francisco in November is currently the most expensive (average of £334). 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 17 April 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 1 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 10m. The distance between Philadelphia and San Francisco is about 2513 mi. Most flights are nonstop.

  • 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 ANA (100%), Air China (100%) and Fiji Airways (88%).

  • 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 £258). Flying from Philadelphia to San Francisco in November is currently the most expensive (average of £334). 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
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale

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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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