Flight Details
Departing from:
Philadelphia International Airport
Arriving at:
San Diego International Airport
Distance:
2370 miles
Southwest® flights from Philadelphia to San Diego from $171
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1 Passenger
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today
Low fares from Philadelphia to San Diego
$
Philadelphia (PHL)to
San Diego (SAN)
Depart: 03/24/2026
One-way
Basic
From
$171
Seen: 23 hrs ago
Philadelphia (PHL)to
San Diego (SAN)
Depart: 02/10/2026
One-way
Basic
From
$171
Seen: 14 hrs ago
Philadelphia (PHL)to
San Diego (SAN)
Depart: 02/18/2026
One-way
Basic
From
$171
Seen: 19 hrs ago
Philadelphia (PHL)to
San Diego (SAN)
Depart: 02/24/2026
One-way
Basic
From
$171
Seen: 2 hrs ago
Philadelphia (PHL)to
San Diego (SAN)
Depart: 04/01/2026
One-way
Basic
From
$171
Seen: 20 hrs ago
Philadelphia (PHL)to
San Diego (SAN)
Depart: 03/04/2026
One-way
Basic
From
$171
Seen: 13 hrs ago
Explore flights from Philadelphia to San Diego
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Route Information
142† Weekly flights
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
There are 142 weekly flights from Philadelphia to San Diego on Southwest Airlines.
To find the lowest fares by day and time to fly Philadelphia to San Diego with Southwest, check out our Low Fare Calendar.
You can rent a car at San Diego International Airport book yours with your flight.
Yes! Flights from Philadelphia to San Diego—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.