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

Compare Philadelphia International to San Francisco International flight deals

Find the cheapest month or even day of the year to fly to San Francisco International

Book the best San Francisco International fare with no extra fees

Flight deals from Philadelphia International to San Francisco International

Looking for a cheap last-minute deal or the best return flight from Philadelphia International to San Francisco International? Find the lowest prices on one-way and return tickets right here.
San Francisco.$436 per passenger.Departing Thu, 4 Sep, returning Sun, 7 Sep.Return flight with Spirit Airlines and Alaska Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Thu, 4 Sep, arriving in San Francisco International.Inbound indirect flight with Alaska Airlines, departs from San Francisco International on Sun, 7 Sep, arriving in Philadelphia International.Price includes taxes and charges.From $436, select.
San Francisco.$444 per passenger.Departing Tue, 8 Jul, returning Wed, 9 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 8 Jul, arriving in San Francisco International.Inbound indirect flight with Frontier Airlines, departs from San Francisco International on Wed, 9 Jul, arriving in Philadelphia International.Price includes taxes and charges.From $444, select.
San Francisco.$444 per passenger.Departing Mon, 30 Jun, returning Wed, 2 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Mon, 30 Jun, arriving in San Francisco International.Inbound indirect flight with Frontier Airlines, departs from San Francisco International on Wed, 2 Jul, arriving in Philadelphia International.Price includes taxes and charges.From $444, select.
San Francisco.$444 per passenger.Departing Wed, 27 Aug, returning Wed, 3 Sep.Return flight with Spirit Airlines and Alaska Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Wed, 27 Aug, arriving in San Francisco International.Inbound indirect flight with Alaska Airlines, departs from San Francisco International on Wed, 3 Sep, arriving in Philadelphia International.Price includes taxes and charges.From $444, select.
San Francisco.$444 per passenger.Departing Fri, 22 Aug, returning Sun, 24 Aug.Return flight with Spirit Airlines and Alaska Airlines.Outbound indirect flight with Spirit Airlines, departs from Philadelphia International on Fri, 22 Aug, arriving in San Francisco International.Inbound indirect flight with Alaska Airlines, departs from San Francisco International on Sun, 24 Aug, arriving in Philadelphia International.Price includes taxes and charges.From $444, select.
San Francisco.$444 per passenger.Departing Fri, 14 Nov, returning Wed, 3 Dec.Return flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from Philadelphia International on Fri, 14 Nov, arriving in San Francisco International.Inbound indirect flight with Hawaiian Airlines, departs from San Francisco International on Wed, 3 Dec, arriving in Philadelphia International.Price includes taxes and charges.From $444, select.
San Francisco.$445 per passenger.Departing Wed, 25 Feb, returning Wed, 4 Mar.Return flight with American Airlines.Outbound direct flight with American Airlines departs from Philadelphia International on Wed, 25 Feb, arriving in San Francisco International.Inbound direct flight with American Airlines departs from San Francisco International on Wed, 4 Mar, arriving in Philadelphia International.Price includes taxes and charges.From $445, select.
San Francisco.$445 per passenger.Departing Thu, 21 Aug, returning Mon, 25 Aug.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Thu, 21 Aug, arriving in San Francisco International.Inbound direct flight with United departs from San Francisco International on Mon, 25 Aug, arriving in Philadelphia International.Price includes taxes and charges.From $445, select.

Find the cheapest month to fly from Philadelphia International to San Francisco International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to San Francisco International flights are currently cheapest in September.
Jun
from $502
Jul
from $444
Aug
from $444
Sep
from $436
Oct
from $445
Nov
from $448
Dec
from $521
Jan
from $448
Feb
Find prices
Mar
from $449
Apr
from $533
May
Find prices

Direct flights from Philadelphia International to San Francisco International

Philadelphia International to San Francisco International: Alternative routes

Compare routes from Philadelphia International to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

Philadelphia to San Francisco: Flight information

The things to know before you go.
Cheapest flight found$436
Cheapest month to flySeptember
Average flight time6 hrs, 12 mins
Most popular airlineAmerican Airlines
Average flights per week140

Finding cheap flights from Philadelphia International to San Francisco International: Frequently asked questions

The best price we found for a return flight from Philadelphia International to San Francisco International is $436. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
6 hours and 12 minutes is the average flight time from Philadelphia International to San Francisco International.
American Airlines, Qatar Airways and British Airways fly direct from Philadelphia International to San Francisco International.
As of June 2025, there are 140 flights per week flying from Philadelphia International to San Francisco International.
The cheapest month to fly from Philadelphia International to San Francisco International is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to San Francisco International Airport on Thursday, 4 September 2025.
Yes – the average flight time is 6 hours and 12 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Spirit Airlines and United offer the cheapest flight tickets to San Francisco International.

Travelling from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO): what you need to know

  • The average duration of a direct flight from Philadelphia International Airport to San Francisco International Airport is 6 hours 10 minutes.

  • San Francisco is three hours behind Philadelphia and follows the UTC-7 timezone.

  • Flights from PHL to SFO start at 06:00 — the earliest with United Airlines. The last departure is at 20:45 with American Airlines. Overall, there are 43 weekly Philadelphia International Airport to San Francisco International Airport flights.

  • Arrive at the airport on time so you don't miss your PHL to SFO flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to prevent a last-minute sprint to your gate.

  • Flying during a peak month such as August? School holidays and other popular seasons can lead to longer queues at check-in and security. Play it safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.

  • Getting to San Francisco (and then discovering more of United States!) is a cinch with American Airlines. This popular airline offers direct flights from Philadelphia International Airport to San Francisco International Airport.

  • The airline with the highest passenger demand on this route is American Airlines.

  • American Airlines is the most punctual carrier offering PHL to SFO flights, with 72.67% of its services reaching their destination on time.

  • We make it simple to book a flight with a stopover. To see your options for tickets from Philadelphia International Airport to San Francisco International Airport, deselect 'Direct flights only.' Then, pick a flight that has a stop long enough to tour the city of your choice. Some great stopovers between PHL and SFO include:

    • Pittsburgh International Airport

    • Denver International Airport

    • Lambert-St. Louis International Airport

How to find the cheapest flights from Philadelphia International Airport (PHL) to San Francisco International Airport (SFO)

  • At the moment, $210 is the cheapest price we've seen for a one-way Philadelphia International Airport to San Francisco International Airport flight. The best price for a return ticket is $436. Keep in mind that fares can change due to availability at the time of booking.

  • Book six months before you travel. After looking at the numbers on our calendar, this is how far you'll want to book ahead to secure cheap tickets from PHL to SFO.

  • May is the cheapest month for flights from Philadelphia International Airport to San Francisco International Airport. If you'd like to fly during a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

  • Save time searching for cheap flights from PHL to SFO by setting up a Price Alert. You'll receive an email or notification through the app when a lower fare pops up.

  • Secure the ideal flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Philadelphia International Airport to San Francisco International Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and number of stops.

Handy information about Philadelphia International Airport (PHL)

  • PHL's address is Industrial Highway and Island Road.

  • Of all flights departing from Philadelphia International Airport, 78.93% land on time at their destination.

  • Central Philadelphia to Philadelphia International Airport is approximately 19 kilometres. Depending on traffic, it'll take you about 15 minutes to get there if you're ride-sharing, catching a cab or driving.

  • The trip on public transport takes about 45 minutes.

  • Get your journey off to a hassle-free start by staying near PHL. Whether you're boarding an early flight from Philadelphia International Airport to San Francisco International Airport or want to avoid feeling rushed, these hotels are the answer:

Arriving at San Francisco International Airport (SFO)

Getting from San Francisco International Airport (SFO) to central San Francisco

  • San Francisco International Airport is approximately 21 kilometres from the centre of San Francisco. The drive time takes about 20 minutes.

  • It takes roughly 45 minutes when travelling by public transport.

When to fly to San Francisco International Airport (SFO)

  • It's time to choose your trip dates for your flight from Philadelphia International Airport to San Francisco International Airport. August is the most popular month to head to San Francisco. If you want a more low-key vibe, go in February.

  • The warmest month in San Francisco is September, with the temperature ranging between 12ºC (54ºF) and 22ºC (72ºF). Book your flights from Philadelphia International Airport to San Francisco International Airport in this month if you like this kind of weather.

  • Search for cheap tickets from PHL to SFO in January if you like travelling in cooler conditions. Temperatures are at their lowest around then, ranging between 6ºC (43ºF) and 16ºC (61ºF) on average.

Explore more of United States

  • San Francisco has plenty to offer, but there are so many other parts of United States just waiting to be explored. About 64 kilometres south-east of San Francisco, a visit to San Jose will keep you on the move. Start with leading attractions like Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.

  • If you're looking to explore another well-known destination in United States, head for Fresno, roughly 257 kilometres south-east of San Francisco. Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden are key highlights.

More travel options

Plan the rest of your trip from Philadelphia to San Francisco

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.