HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$127+ Cheap flights from Philadelphia to San Diego (PHL - SAN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SAN
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Philadelphia to San Diego are usually found in November or January, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$266
(CheapOair)

One-way from

$127
(FlightHub)

Popular in

December

Cheapest in

November

Average price

$426

Good round-trip deal

$395 or less

Good one-way deal

$227 or less
From Philadelphia to San Diego
Search Deals
One-way flight from Philadelphia to San Diego
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to San Diego.
Search Deals
Price to beat on a one-way flight from Philadelphia to San Diego.
Search Deals

Find flight deals from Philadelphia to San Diego

Cheapest flights from Philadelphia to San Diego
Explore the most affordable flight options available from Philadelphia to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This CheapOair deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/133:46 pmPHL - SAN
2 stops18h 35mMultiple Airlines
Sun 8/177:04 pmSAN - PHL
1 stop7h 45mMultiple Airlines
Deal found 7/29$266
This CheapOair deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/213:46 pmPHL - SAN
2 stops10h 51mSpirit Airlines
Mon 8/256:15 amSAN - PHL
1 stop14h 44mSpirit Airlines
Deal found 7/29$267
This JetBlue deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2310:20 amPHL - SAN
1 stop11h 38mJetBlue
Sat 9/278:55 pmSAN - PHL
1 stop9h 27mJetBlue
Deal found 7/28$273
This Cheapflightsfares deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:15 amPHL - SAN
1 stop7h 55mFrontier
Sat 8/1612:05 pmSAN - PHL
1 stop14h 04mFrontier
Deal found 7/29$275
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:40 pmPHL - SAN
Nonstop5h 59mAmerican Airlines
Tue 12/210:41 pmSAN - PHL
Nonstop5h 03mAmerican Airlines
Deal found 7/28$314

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Philadelphia to San Diego that are best for you.

Fly from

Philadelphia

Fly to

San Diego

Route

Depart

Return

Price

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 8/13

3:46 pm-7:21 am

2 stops18h 35m

San Diego

Sun 8/17

7:04 pm-5:49 am

1 stop7h 45m

$266

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Thu 8/21

3:46 pm-11:37 pm

2 stops10h 51m

San Diego

Mon 8/25

6:15 am-11:59 pm

1 stop14h 44m

$267

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Tue 9/23

10:20 am-6:58 pm

1 stop11h 38m

San Diego

Sat 9/27

8:55 pm-9:22 am

1 stop9h 27m

$273

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Tue 8/12

6:15 am-11:10 am

1 stop7h 55m

San Diego

Sat 8/16

12:05 pm-5:09 am

1 stop14h 04m

$275

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 8/13

3:46 pm-7:21 am

2 stops18h 35m

$127

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Sat 8/30

6:25 am-11:10 am

1 stop7h 45m

$128

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Mon 8/18

7:19 am-11:37 pm

1 stop19h 18m

$129

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 9/24

10:20 am-6:58 pm

1 stop11h 38m

$147

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Sat 8/30

4:00 pm-6:32 pm

Nonstop5h 32m

$153

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 8/27

5:50 am-9:50 am

1 stop7h 00m

$162

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Philadelphia to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to San Diego

How far ahead should I book a flight from Philadelphia to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to San Diego. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from Philadelphia to San Diego, you should look to book at least 79 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Philadelphia to San Diego?

Currently, August is the cheapest month in which you can book a flight from Philadelphia to San Diego (average of $286). Flying from Philadelphia to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to SAN?

Find hourly flight availability from Philadelphia to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

A simple way to save on the total cost of your ticket is to fly from Philadelphia to San Diego at noon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Philadelphia to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to San Diego. Price data was last updated on July 27, 2025.

Travelers seeking maximum savings on their Philadelphia to San Diego flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Philadelphia to San Diego

Explore weekly flight availability from Philadelphia to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

The most flights from PHL to SAN are scheduled on a Monday (8 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

What’s the top layover airport for flights from Philadelphia to San Diego?

Share of 1-stop round-trip flights from Philadelphia to San Diego chosen by Cheapflights users in the past 12 months, using the same layover each way.

Denver (DEN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Philadelphia to San Diego on Cheapflights.

What’s the cheapest layover airport for flights from Philadelphia to San Diego?

Average round-trip fare for 1-stop flights from Philadelphia to San Diego, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of $276.

What’s the fastest layover option from Philadelphia to San Diego?

Shortest average travel time for 1-stop one-way flights from Philadelphia to San Diego, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 7h 17m.

Which airport typically offers the quickest layover for flights from Philadelphia to San Diego?

Average layover duration for 1-stop one-way flights from Philadelphia to San Diego, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 3h 05m.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated July 29, 2025.
Read through reviews of airlines operating flights from Philadelphia to San Diego, such as Southwest, JetBlue, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
JetBlue
7.3
Good
2,913 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Spirit Airlines
6.3
Okay
8,040 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Philadelphia to San Diego?

    If you wish to fly to San Diego from Philadelphia, then you need to book flights from Philadelphia to San Diego. There are 6 flights from Philadelphia (PHL) to San Diego (SAN) per day to choose from. Flights to San Diego from Philadelphia are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 5h 30m is how long a nonstop flight from Philadelphia to San Diego typically takes.

  • What are the cheapest airlines flying from Philadelphia to San Diego round-trip?

    According to our current data, Spirit Airlines ($267), JetBlue ($273), and Frontier ($275) offers the cheapest pricing from Philadelphia to San Diego. Spirit Airlines is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to San Diego one-way?

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $127. Frontier flights start at $128 while deals on JetBlue start at $147 one-way.

  • What are the most reliable airlines from Philadelphia to San Diego?

    No one likes to see their flight delayed. When booking a flight from Philadelphia to San Diego consider choosing American Airlines (66%), Qatar Airways (63%) or British Airways (55%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Philadelphia to San Diego?

    Looking for the cheapest flight from Philadelphia to San Diego? While on average our users pay $894, our data indicates the cheapest price to be $187. The most popular route (Philadelphia - San Diego), is priced around $177.

  • Where are the most common layover locations when flying from Philadelphia to San Diego?

    The most popular layover on flights from Philadelphia to San Diego is Las Vegas.

  • What are some popular things to do or see while on a layover in Las Vegas?

    Las Vegas travelers tend to visit Fremont Street Experience, The Colosseum at Caesars Palace, and Stratosphere Tower more than anywhere else. Fremont Street Experience, The Colosseum at Caesars Palace, and Stratosphere Tower are located about 5.9 mi, 2.6 mi, and 4.3 mi, respectively from Las Vegas Harry Reid Intl. Those on a layover in Las Vegas in need of a rental car can book one at Las Vegas Harry Reid Intl for about $62.

  • Where are the least popular layover locations for Philadelphia to San Diego flights?

    Philadelphia to San Diego flights that have layovers will least frequently stop in Denver.

  • Can I find deals for flights from Philadelphia to San Diego that include hotel bookings?

    Yes. In addition to deals on Philadelphia to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to San Diego.

  • Can I find deals for business class flights from Philadelphia to San Diego?

    Yes. Cheapflights offers flight deals from Philadelphia to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Philadelphia to San Diego (average of $286). Flying from Philadelphia to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
Poway
National City
Lemon Grove
Imperial Beach
La Mesa
Alpine
Santee

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Los Angeles flights
John F Kennedy Intl to San Francisco flights
Newark to San Francisco flights
Newark to Las Vegas flights
LaGuardia to Los Angeles flights
LaGuardia to Las Vegas flights
Dulles Intl to Las Vegas flights
Reagan-National to Los Angeles flights
LaGuardia to San Francisco flights
John F Kennedy Intl to San Diego flights
John F Kennedy Intl to Ontario flights
Dulles Intl to Los Angeles flights
Reagan-National to Las Vegas flights
Reagan-National to San Francisco flights
Dulles Intl to San Francisco flights
Newark to San Diego flights
Newark to Burbank flights
Newark to Ontario flights
Philadelphia to San Francisco flights
Philadelphia to Las Vegas flights
Newark to Santa Ana flights
LaGuardia to Santa Ana flights
LaGuardia to Burbank flights
Newark to Oakland flights
Newark to San Jose flights
LaGuardia to Ontario flights
Philadelphia to Los Angeles flights
Dulles Intl to San Diego flights
Dulles Intl to Ontario flights
LaGuardia to San Diego flights
Reagan-National to San Diego flights
Pittsburgh to Las Vegas flights
LaGuardia to Oakland flights
John F Kennedy Intl to Santa Ana flights
Newark to Sacramento flights
Philadelphia to Ontario flights
Reagan-National to Ontario flights
John F Kennedy Intl to San Jose flights
John F Kennedy Intl to Reno flights
Dulles Intl to Sacramento flights
Reagan-National to Santa Ana flights
Dulles Intl to Santa Ana flights
Pittsburgh to San Francisco flights
John F Kennedy Intl to Sacramento flights
LaGuardia to San Jose flights
Philadelphia to Santa Barbara flights
Dulles Intl to San Jose flights

Top 6 airlines flying from Philadelphia to San Diego

Discover the top 6 airlines that operate flights from Philadelphia to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$138Average$228FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$143Average$242FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$226Average$390FlexibilityNo cancel feeOn-time69%
DeltaCheapest$230Average$339FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$289Average$446FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$292Average$488FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.