$136 Find Cheap Flights from Philadelphia to San Francisco Bay Area

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to San Francisco Bay Area departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco Bay Area

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to San Francisco Bay Area.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to San Francisco Bay Area.
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Cheap Flights from Philadelphia to San Francisco Bay Area

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
San Francisco
San Francisco1 stop$289
San Jose
San Jose1 stop$271
San Francisco
San Francisco1 stop$289
San Jose
San Jose1 stop$271

Book Cheap Philadelphia to San Francisco Bay Area Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to San Francisco Bay Area that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to San Francisco Bay Area

Sat, May 2 - Sat, May 9
American Airlines Logo
3:21 pm - 9:59 pm
PHL
-
SJC
9h 38m
1 stop
American Airlines Logo
7:09 pm - 5:38 am
SJC
-
PHL
7h 29m
1 stop
$271American Airlines
Tue, Apr 28 - Wed, May 6
Delta Logo
6:54 pm - 11:42 pm
PHL
-
SJC
7h 48m
1 stop
Delta Logo
6:00 pm - 8:55 am
SJC
-
PHL
11h 55m
2 stops
$276Delta
Thu, Jun 4 - Tue, Jun 9
Frontier Logo
7:50 pm - 11:59 am
PHL
-
SJC
19h 09m
1 stop
Frontier Logo
5:57 pm - 7:00 am
SJC
-
PHL
10h 03m
1 stop
$279Frontier
Tue, Apr 21 - Wed, Apr 22
Southwest Logo
4:00 pm - 11:00 pm
PHL
-
SJC
10h 00m
2 stops
Southwest Logo
11:25 am - 11:55 pm
SJC
-
PHL
9h 30m
2 stops
$281Southwest
Tue, Apr 28 - Wed, May 6
Delta Logo
11:34 am - 7:07 pm
PHL
-
SJC
10h 33m
2 stops
Delta Logo
8:20 pm - 8:55 am
SJC
-
PHL
9h 35m
2 stops
$282Delta
Wed, Apr 8 - Wed, Apr 22
Southwest Logo
4:00 pm - 11:00 pm
PHL
-
SJC
10h 00m
2 stops
Southwest Logo
1:35 pm - 11:55 pm
SJC
-
PHL
7h 20m
1 stop
$286Southwest
Mon, Apr 6 - Fri, Apr 10
Frontier Logo
8:36 pm - 8:05 pm
PHL
-
SFO
26h 29m
1 stop
Frontier Logo
6:00 am - 5:31 am
SFO
-
PHL
20h 31m
1 stop
$289Frontier
Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
7:25 am - 6:01 pm
PHL
-
STS
13h 36m
1 stop
Alaska Airlines Logo
6:53 pm - 6:05 am
STS
-
PHL
8h 12m
1 stop
$337Alaska Airlines
Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
7:25 am - 11:13 pm
PHL
-
STS
18h 48m
2 stops
Alaska Airlines Logo
6:53 pm - 6:05 am
STS
-
PHL
8h 12m
1 stop
$390Alaska Airlines
Thu, May 28 - Mon, Jun 1
American Airlines Logo
5:00 am - 12:05 pm
PHL
-
STS
10h 05m
1 stop
American Airlines Logo
12:45 pm - 12:36 am
STS
-
PHL
8h 51m
1 stop
$477American Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to San Francisco Bay Area flights

Get data-powered insights and trends into flights from Philadelphia to San Francisco Bay Area to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Philadelphia to San Francisco Bay Area flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to San Francisco Bay Area from Philadelphia found in the last 72 hours was to San Francisco, at $289 round-trip. The most popular route is from Philadelphia (PHL) to San Francisco (SFO), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $289.

What is the cheapest time of day to fly to San Francisco Bay Area?

The average price for all round-trip flights from Philadelphia to San Francisco Bay Area depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to San Francisco Bay Area is generally at night, when round-trip flights cost $373 on average. Morning departures are around 2% cheaper than evening flights, on average. The most expensive time of day to fly to San Francisco Bay Area is generally in the evening, which is peak travel time and where the average cost of a ticket is $489.

Can I save money by flying with a layover from Philadelphia to San Francisco Bay Area?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $575, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Philadelphia to San Francisco Bay Area?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to San Francisco Bay Area, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to San Francisco Bay Area is September, when tickets cost $334 (return) on average. On the other hand, the most expensive months are November and March, when the average cost of round-trip tickets is $449 and $438 respectively.

What’s the cheapest day of the week to fly from Philadelphia to San Francisco Bay Area?

The average price of all round-trip flights from Philadelphia to San Francisco Bay Area clicked on KAYAK for each day over the last 12 months.

When flying from Philadelphia to San Francisco Bay Area, you should consider leaving on a Wednesday and avoid Mondays if you are looking for the best rates. For your return to Philadelphia, you’ll find the best rates on Wednesdays and the most expensive ones on Mondays.

How far in advance should I book a flight from Philadelphia to San Francisco Bay Area?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to San Francisco Bay Area, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to San Francisco Bay Area, you should book around 5 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$136
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Philadelphia to San Jose

FAQs - booking San Francisco Bay Area flights

  • How does KAYAK find such low prices on flights from Philadelphia to San Francisco Bay Area?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to San Francisco Bay Area.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to San Francisco Bay Area?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Philadelphia to San Francisco Bay Area is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to San Francisco Bay Area?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Philadelphia to San Francisco Bay Area with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to San Francisco Bay Area?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Philadelphia to San Francisco Bay Area up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to San Francisco Bay Area

  • Looking for a cheap flight? 25% of our users found tickets from Philadelphia to the following destinations at these prices or less: San Francisco $273 one-way - $370 round-trip

Reviews of the top 5 airlines serving from Philadelphia to San Francisco Bay Area

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to San Francisco Bay Area. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to San Francisco Bay Area? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4324 reviews
8.0Comfort
8.6Crew
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

Boarding was easy. The seats are small and fairly uncomfortable

8.0 ExcellentNicole, Mar 2026
LGB - OAK
Read more Southwest reviews

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

The charges were ridiculous for an hour flight and the turbulence was very scary.

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Left a few minutes early. Got in 15 minutes early. Very attentive service on board. Very organized boarding.

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Overall we had a good experience during our flight from San Francisco to Houston.

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

Everything you need to know for your flight to San Francisco Bay Area

Information on your arrival and departure airports