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$159+ Cheap flights from Philadelphia to San Francisco (PHL - SFO)

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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SFO
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to San Francisco are usually found in February or September, booked 87 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 September 15, 2025.

Round-trip from

$289
(United Airlines)

One-way from

$159
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$372

Good round-trip deal

$319 or less

Good one-way deal

$208 or less
From Philadelphia to San Francisco
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One-way flight from Philadelphia to San Francisco
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Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Philadelphia to San Francisco.
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Price to beat on a one-way flight from Philadelphia to San Francisco.
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Find flight deals from Philadelphia to San Francisco

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 September 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:50 amPHL - SFO
Nonstop6h 04mAmerican Airlines
Tue 11/411:14 pmSFO - PHL
Nonstop5h 11mAmerican Airlines
Deal found 9/14$289
This CheapOair deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:45 pmPHL - SFO
2 stops25h 32mFrontier
Wed 10/86:34 amSFO - PHL
1 stop19h 45mFrontier
Deal found 9/14$290
This Frontier deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:15 amPHL - SFO
2 stops19h 47mFrontier
Sun 9/2811:57 pmSFO - PHL
2 stops13h 58mFrontier
Deal found 9/13$291
This CheapOair deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:00 amPHL - SFO
1 stop31h 10mFrontier
Sat 11/810:23 pmSFO - PHL
1 stop10h 04mFrontier
Deal found 9/14$292
This Frontier deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/98:15 amPHL - SFO
1 stop10h 45mFrontier
Sat 10/2510:23 pmSFO - PHL
1 stop9h 37mFrontier
Deal found 9/13$293
This CheapOair deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:15 amPHL - SFO
1 stop10h 45mFrontier
Sun 10/124:55 pmSFO - PHL
1 stop29h 53mFrontier
Deal found 9/14$294
This CheapOair deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/111:02 pmPHL - SFO
1 stop11h 21mFrontier
Mon 10/2010:23 pmSFO - PHL
1 stop8h 05mFrontier
Deal found 9/13$295
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:45 amPHL - SFO
1 stop9h 32mMultiple Airlines
Sun 10/1910:25 pmSFO - PHL
2 stops22h 34mMultiple Airlines
Deal found 9/13$296
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:35 amPHL - SFO
1 stop10h 17mDelta
Wed 10/2211:58 amSFO - PHL
1 stop9h 54mDelta
Deal found 9/13$297
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:00 amPHL - SFO
2 stops16h 21mFrontier
Thu 10/94:55 pmSFO - PHL
1 stop29h 46mFrontier
Deal found 9/13$298
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:34 amPHL - SFO
Nonstop6h 01mUnited Airlines
Sat 10/117:00 amSFO - PHL
1 stop7h 35mUnited Airlines
Deal found 9/15$299
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:19 amPHL - SFO
2 stops17h 46mMultiple Airlines
Thu 11/61:10 pmSFO - PHL
1 stop8h 58mMultiple Airlines
Deal found 9/14$300

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Philadelphia to San Francisco that are best for you.

Fly from

Philadelphia

Fly to

San Francisco

Route

Depart

Return

Price

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Tue 10/28

6:25 am-9:45 am

Nonstop6h 20m

San Francisco

Tue 11/4

8:47 am-5:12 pm

Nonstop5h 25m

$289

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 10/17

6:29 pm-9:32 pm

Nonstop6h 03m

San Francisco

Sun 10/19

9:04 pm-5:26 am

Nonstop5h 22m

$289

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sat 12/6

6:15 am-9:40 am

Nonstop6h 25m

San Francisco

Wed 12/10

11:15 am-7:41 pm

Nonstop5h 26m

$289

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 10/8

6:34 am-9:35 am

Nonstop6h 01m

San Francisco

Sat 10/11

8:54 am-5:27 pm

Nonstop5h 33m

$289

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 10/15

12:19 pm-6:56 pm

1 stop9h 37m

San Francisco

Tue 10/28

7:15 am-6:22 pm

1 stop8h 07m

$297

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Tue 10/14

6:00 am-10:33 am

1 stop7h 33m

San Francisco

Mon 10/27

12:35 am-10:54 am

1 stop7h 19m

$297

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Fri 11/7

8:00 pm-1:15 am

1 stop8h 15m

San Francisco

Wed 11/12

9:00 pm-5:18 am

Nonstop5h 18m

$299

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sat 10/18

10:05 am-5:20 pm

1 stop10h 15m

San Francisco

Fri 10/24

9:04 pm-5:26 am

Nonstop5h 22m

$299

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Wed 10/15

6:34 am-9:35 am

Nonstop6h 01m

San Francisco

Wed 10/22

12:43 am-11:55 am

1 stop8h 12m

$299

PhiladelphiaSan Francisco

PHL - SFO

PHLSFO

Philadelphia

Sat 11/1

6:00 am-10:33 am

1 stop7h 33m

San Francisco

Mon 11/3

12:35 am-10:54 am

1 stop7h 19m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 21 results
1
2
3

The best insider tips for Philadelphia to San Francisco flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Philadelphia to San Francisco trip
Airports
PHL

For efficient check-in, verify your airline’s terminal before arriving. Terminals are spread out, and only some are connected by indoor walkways.

Read more about PHLby Mark Chesnut
SFO

Use BART for budget-friendly travel from SFO to downtown San Francisco. The trip takes about 40 minutes and is the least expensive option.

Read more about SFOby Harriet Baskas
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Harriet Baskas

Harriet Baskas

Expert on SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

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 round-trip 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 round-trip flight from Philadelphia to San Francisco. Price data was last updated on September 12, 2025.

The price you pay for your flight from Philadelphia to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 70 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Philadelphia to San Francisco (average of $276). Flying from Philadelphia to San Francisco in June is currently the most expensive (average of $357). 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 September 15, 2025.

It’s typically best to fly out from Philadelphia to San Francisco at noon. Doing so could potentially save you 34% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Philadelphia to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to San Francisco. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Philadelphia to San Francisco flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated September 15, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Philadelphia to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • What airports do I use to fly from Philadelphia to San Francisco?

    You will need to book a flight from Philadelphia to San Francisco if you want to fly from Philadelphia to San Francisco. At least 7 different airlines have flights from Philadelphia (PHL) to San Francisco (SFO) on a regular basis. There are 17 flights to San Francisco from the Philadelphia airport per day. If you manage to book one that is nonstop, then you can expect the flight time from PHL to SFO to be around 6h 01m.

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

    The Philadelphia to San Francisco flight path was viewed by 21 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?

    There are many flights that can get you from Philadelphia to San Francisco in 6h 20m. Fly via United Airlines or Delta to get the fastest option. The distance between Philadelphia and San Francisco is about 2513 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Philadelphia to San Francisco round-trip?

    Flying on Spirit Airlines is currently your cheapest option to San Francisco, with prices starting at $122. Additional round-trip tickets that might be worth considering are offered by Frontier and JetBlue, with the lowest prices starting at $135 and $225, respectively. These flights start at 69% lower than the current average price 3 months from now.

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

    No one likes to see their flight delayed. When booking a flight from Philadelphia to San Francisco consider choosing ANA (95%), Air China (94%) or United Airlines (82%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Philadelphia to San Francisco? While on average our users pay $1,079, our data indicates the cheapest price to be $158. The most popular route (Philadelphia - San Francisco), is priced around $168.

  • Where are the most common layover locations when flying from Philadelphia to San Francisco?

    The most popular layover on flights from Philadelphia to San Francisco is Atlanta. Detroit is the second most popular location for layovers on flights from Philadelphia to San Francisco.

  • What are some popular things to do or see while on a layover in Atlanta?

    Georgia Aquarium, Tabernacle, and Fox Theatre are the most popular attractions in Atlanta if you're in need of something to do during your layover. Georgia Aquarium, Tabernacle and Fox Theatre are located about 8.6 mi, 8.3 mi, and 9.3 mi, respectively from Atlanta Hartsfield-Jackson if you are interested in checking them out. Travelers can book a car rental at Atlanta Hartsfield-Jackson for about $53 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Detroit?

    Fox Theatre, Masonic Temple, and Fillmore Detroit are the most popular attractions in Detroit if you're in need of something to do during your layover. Fox Theatre, Masonic Temple, and Fillmore Detroit are located about 17.3 mi, 17.0 mi, and 17.3 mi, respectively from Detroit Metropolitan Wayne County. Those landing in Detroit looking to spend some time exploring during their layover can rent a car for about $67 per day.

  • Where are the least popular layover locations for Philadelphia to San Francisco flights?

    The least popular layover on flights from Philadelphia to San Francisco is Phoenix. Denver sees the second fewest layovers for non-direct flights flying from Philadelphia to San Francisco.

  • 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 vacation 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, January is the cheapest month in which you can book a flight from Philadelphia to San Francisco (average of $276). Flying from Philadelphia to San Francisco in June is currently the most expensive (average of $357). 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

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Turlock
Antioch
Watsonville
Santa Clara
Manteca
Sunnyvale
Hollister
Vacaville
Foster City
Union City
Vallejo
Burlingame
Redwood City
San Mateo
San Leandro
Lathrop

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Alternative routes for Philadelphia to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Philadelphia to San Francisco

Discover the top 7 airlines that operate flights from Philadelphia to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$122Average$205FlexibilityNo cancel feeOn-time65%
FrontierCheapest$135Average$233FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$225Average$282FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$231Average$459FlexibilityNo cancel feeOn-time63%
DeltaCheapest$276Average$344FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$278Average$398FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$289Average$423FlexibilityNo cancel feeOn-time69%

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