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Cheap Flights from Philadelphia International to San Diego

Compare Philadelphia International to San Diego flight deals

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

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Flight deals from Philadelphia International to San Diego

Looking for a cheap last-minute deal or the best round-trip flight from Philadelphia International Airport to San Diego? If you want to travel next month, round-trip fares start from AED 999. Find the lowest prices on one-way and round-trip tickets right here.
San Diego.AED 501 per passenger.Departing Sat, Jul 4.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, Jul 4, arriving in San Diego International.Price includes taxes and charges.From AED 501, select.
San Diego.AED 501 per passenger.Departing Mon, Jun 1.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Mon, Jun 1, arriving in San Diego International.Price includes taxes and charges.From AED 501, select.
San Diego.AED 501 per passenger.Departing Thu, Aug 20.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Thu, Aug 20, arriving in San Diego International.Price includes taxes and charges.From AED 501, select.
San Diego.AED 520 per passenger.Departing Tue, May 26.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, May 26, arriving in San Diego International.Price includes taxes and charges.From AED 520, select.
San Diego.AED 522 per passenger.Departing Tue, Sep 1.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Sep 1, arriving in San Diego International.Price includes taxes and charges.From AED 522, select.
San Diego.AED 726 per passenger.Departing Wed, Oct 28.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Wed, Oct 28, arriving in San Diego International.Price includes taxes and charges.From AED 726, select.
San Diego.AED 755 per passenger.Departing Mon, Nov 23.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Philadelphia International on Mon, Nov 23, arriving in San Diego International.Price includes taxes and charges.From AED 755, select.
San Diego.AED 1,270 per passenger.Departing Thu, Feb 18.One-way flight with Delta.Outbound indirect flight with Delta, departing from Philadelphia International on Thu, Feb 18, arriving in San Diego International.Price includes taxes and charges.From AED 1,270, select.
San Diego.AED 1,777 per passenger.Departing Sat, Mar 20.One-way flight with United.Outbound indirect flight with United, departing from Philadelphia International on Sat, Mar 20, arriving in San Diego International.Price includes taxes and charges.From AED 1,777, select.
San Diego.AED 1,875 per passenger.Departing Fri, Dec 18.One-way flight with Delta.Outbound indirect flight with Delta, departing from Philadelphia International on Fri, Dec 18, arriving in San Diego International.Price includes taxes and charges.From AED 1,875, select.
San Diego.AED 1,978 per passenger.Departing Mon, Sep 14.One-way flight with American Airlines.Outbound direct flight with American Airlines departing from Philadelphia International on Mon, Sep 14, arriving in San Diego International.Price includes taxes and charges.From AED 1,978, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to San Diego flights are currently cheapest in June.
May
from AED 520
Jun
from AED 501
Jul
from AED 501
Aug
from AED 501
Sep
from AED 522
Oct
from AED 726
Nov
from AED 755
Dec
from AED 1,875
Jan
Find prices
Feb
from AED 1,270
Mar
from AED 1,777
Apr
Find prices

Direct flights from Philadelphia International to San Diego

Alternative Philadelphia International to San Diego routes

Looking for the cheapest, fastest or easiest route from Philadelphia International to San Diego? You could fly into the following airports instead.

San Diego International

4km from central San Diego
ClosestCheapest
from AED 501
Search flights

McClellan – Palomar

48km from central San Diego
from AED 1,244
Search flights

Philadelphia to San Diego: Flight information

The things to know before you go.
Cheapest flight foundAED 501
Cheapest month to flyJuly
Average flight time5 hrs, 56 mins
Most popular airlineAmerican Airlines
Average flights per week60

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

There are 2 airports in San Diego: San Diego International and McClellan – Palomar.
The best price we found for a round-trip flight from Philadelphia International to San Diego is AED 999. 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.
5 hours and 56 minutes is the average flight time from Philadelphia International to San Diego.
American Airlines, Qatar Airways and Iberia fly direct from Philadelphia International to San Diego.
There are 60 flights per week flying from Philadelphia International to San Diego, as of May 2026.
The cheapest month to fly from Philadelphia International to San Diego is usually May.
If you're flying from Philadelphia International Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the center of San Diego. We've found flights to this airport from AED 999.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to San Diego on Friday, May 29, 2026.
Yes – the average flight time is 5 hours and 56 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 Diego 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 Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 17°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, Frontier Airlines and American Airlines offer the cheapest flight tickets to San Diego.

Traveling from Philadelphia International Airport (PHL) to San Diego: what you need to know

  • The average time for a direct flight from Philadelphia International Airport to San Diego is 5 hours 15 minutes.

  • San Diego is three hours behind Philadelphia, where Philadelphia International Airport is located. San Diego follows the UTC-8 timezone.

  • The most popular route is from Philadelphia International Airport (PHL) to San Diego International Airport (SAN). You can choose from 20 services every week between these two airports. If you want to take off as soon as possible, the earliest flight from PHL to SAN is the 08:14 American Airlines service. If you prefer to travel later, the last departure is at 19:10 with American Airlines.

  • Allow plenty of time to get on your PHL to San Diego flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months like July, you'll want to get to the airport even earlier. Arrive two hours before domestic departures and four hours ahead for international flights whenever you're traveling during high season in general.

  • Direct Philadelphia International Airport to San Diego tickets are available for booking. San Diego International Airport (SAN) is where you'll arrive.

  • Take to the skies with American Airlines. This leading carrier operates direct flights from Philadelphia International Airport to San Diego.

  • Located around 11 kilometers from central Philadelphia, PHL can be reached in about 20 minutes by car. Traveling on public transport will take roughly 30 minutes.

  • Searching for a hotel near PHL? If you're catching an early flight from Philadelphia International Airport to San Diego, these stays will put you moments from your departure gate:

  • 77% of flights leaving from Philadelphia International Airport land at their destination on schedule.

  • You'll find PHL at 8500 Essington Ave.

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

  • AED 501 is the cheapest price we've found for a one-way Philadelphia International Airport to San Diego flight. A round-trip plane ticket right now is AED 999. Depending on the availability when you book, these fares could change.

  • To pick up cheap flights from PHL to San Diego, book as early as you can. Airlines typically offer lower fares when tickets are first released.

  • The 'Whole month' tool will show you the cheapest tickets from Philadelphia International Airport to San Diego across the entire month. It's a good way to find a bargain if your travel dates are flexible.

  • There's no need to check every day to see if fares have dropped when you set up a Price Alert. We'll update you the moment there's an updated deal for cheap flights from PHL to San Diego.

  • Find an affordable flight from Philadelphia International Airport to San Diego with the help of our filters. Select your preferred times, number of stops and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) is around 5 kilometers from the center of San Diego. If you're opting for a ride-share or a cab, the drive takes about 15 minutes.

  • It typically takes 25 minutes if you're traveling on public transport.

  • If you have a late flight from Philadelphia International Airport to San Diego, few things beat the convenience of staying near the terminal. Grab your suitcases from the carousel and then be showered and resting soon after at one of these hotels near SAN:

  • Booking your vehicle from San Diego International Airport around two weeks ahead of your flight from PHL to San Diego can help you get the lowest rate.

  • You'll find SAN at N Harbor Dr.

McClellan-Palomar Airport (CLD)

  • Central San Diego is roughly 48 kilometers from McClellan-Palomar Airport (CLD). Disembark your flight from Philadelphia International Airport to San Diego and then be on the lookout for any airport signs directing you to the center.

  • Hang up the 'Do not disturb' sign and unwind at a hotel near CLD. Here are a few options where you can settle in after your PHL to San Diego flight:

  • Get the vehicle you actually want, not just what's left over, by securing your ride from CLD in advance. You can also avoid last-minute price surges, especially when the airport is busy.

Best time to go to San Diego

  • December is the quietest month for flights from Philadelphia International Airport to San Diego, while July is the most popular. Pick the best time to go to San Diego based on whether you like a bustling atmosphere or a more laid-back vibe.

  • The warmest month in San Diego is August, with temperatures ranging between 16ºC (61ºF) and 27ºC (81ºF). Book your Philadelphia International Airport to San Diego plane ticket then if that's your ideal forecast.

  • If you like cooler conditions, look for a cheap ticket from PHL to San Diego in February when temperatures average between 8ºC (46ºF) and 22ºC (72ºF).

More about San Diego

  • Start your San Diego trip right by choosing the perfect place to stay. After booking your flight from Philadelphia International Airport to San Diego, check out our selection of hotels including:

  • There are so many things to do and see in this city it can be hard to work out where to begin. San Diego Balboa Park, San Diego Zoo and USS Midway Museum are major attractions which should feature on any well-planned San Diego itinerary.

Explore more of the United States

  • You've seen San Diego, now it's time to explore other parts of the United States. Journey about 177 kilometers northwest to Los Angeles to tick off its top sights. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, you'll have a full itinerary ahead.

  • Phoenix is another essential stop in the United States and is around 483 kilometers east of San Diego. No journey is complete without experiencing Camelback Mountain, Yayoi Kusama Fireflies Infinity Mirror Room and Heard Museum.

More travel options

Plan the rest of your trip from Philadelphia to San Diego

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