Philadelphia to San Diego flights
The cheapest round trip we found from Philadelphia to San Diego is $379 (Dec 18 – 29, 1 stop), 22% below the usual $489.
PHL to SAN · Round trip · Economy · Prices per person in USD · Price found (2 days ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | No fares found yet |
| December 2026 | $379 (cheapest month) |
| January 2027 | $452 |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | $599 |
| May 2027 | No fares found yet |
| June 2027 | No fares found yet |
| July 2027 | No fares found yet |
| August 2027 | No fares found yet |
| September 2027 | $526 |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 18 – 29 11 nights · leave Fri$379 −22% vs usual$379 −22% vs usual Book
Frontier Airlines 1 stop · 7h 04m -
Jan 1 – 4, 2027 3 nights · leave Fri$452 −8% vs usual$452 −8% vs usual Book
Southwest Airlines 1 stop · 6h 40m -
Dec 30 – Jan 3, 2027 4 nights · leave Wed$469$469 Book
Frontier Airlines 3 stops · 10h 56m
-
Dec 1 – 4 3 nights · leave Tue$506$506 Book
Frontier Airlines 2 stops · 8h 32m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in San Diego
One Go City pass for San Diego Zoo, San Diego Zoo Safari Park, Legoland California and more
- All-Inclusive Pass Unlimited Visit as many attractions as you like for 1–7 days from $99 See pass
- All-Inclusive Pass Plus All-Inclusive plus 5 extra attractions from $149 See pass
- Essentials Pass A few top attractions, chosen as you go from $149 See pass
Go City prices checked Oct 23, 2026; the final price is on Go City. Partner links: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
San Diego · Dec 18 – 29Partner links: we may earn a commission if you book, at no extra cost to you.
Good to know
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Philadelphia to San Diego: questions
How much does a flight from Philadelphia to San Diego cost?
The cheapest round trip we have found right now is $379, leaving December 18 and returning December 29. The usual price on this route is about $489, so this fare is 22% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Philadelphia to San Diego?
December 2026, with round trips from $379. The most expensive month in our data is April (from $599). Based on the 4 months ahead we have prices for.
Which airports do Philadelphia to San Diego flights use?
Philadelphia airports include Philadelphia International (PHL) and Trenton-Mercer (TTN). San Diego airports include San Diego International (SAN) and McClellan-Palomar (CLD). The prices on this page cover every airport in both cities (PHL and SAN are the city codes).
About this route
We track round-trip economy fares from Philadelphia (United States) to San Diego (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $379, departing December 18 and returning December 29, about 22% below the usual $489. The cheapest month to fly in our data is December, from $379. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.