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$122+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SAN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to San Diego are usually found in January or November, 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 3, 2025.

Round-trip from

$267
(Cheapflightsfares)

One-way from

$122
(Priceline)

Popular in

December

Cheapest in

January

Average price

$445

Good round-trip deal

$383 or less

Good one-way deal

$198 or less
From Philadelphia to San Diego
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One-way flight from Philadelphia to San Diego
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Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Philadelphia to San Diego.
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Price to beat on a one-way flight from Philadelphia to San Diego.
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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 3, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/3. 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.
Thu 8/213:46 pmPHL - SAN
2 stops10h 51mSpirit Airlines
Mon 8/251:17 pmSAN - PHL
1 stop7h 42mSpirit Airlines
Deal found 7/3$267
This Cheapflightsfares deal was found by Cheapflights users on 7/3. 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.
Wed 7/236:15 amPHL - SAN
1 stop30h 37mFrontier
Sun 7/278:31 amSAN - PHL
1 stop12h 31mFrontier
Deal found 7/3$268
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/168:15 amPHL - SAN
1 stop13h 08mMultiple Airlines
Mon 10/203:10 pmSAN - PHL
1 stop11h 22mMultiple Airlines
Deal found 7/2$269
This JetBlue deal was found by Cheapflights users on 7/2. 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.
Thu 9/2510:20 amPHL - SAN
1 stop11h 37mJetBlue
Mon 10/68:15 pmSAN - PHL
1 stop10h 07mJetBlue
Deal found 7/2$273
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1210:30 amPHL - SAN
1 stop10h 23mDelta
Sat 8/1610:47 amSAN - PHL
1 stop8h 33mDelta
Deal found 7/3$277

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 3, 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

Thu 8/21

3:46 pm-11:37 pm

2 stops10h 51m

San Diego

Mon 8/25

1:17 pm-11:59 pm

1 stop7h 42m

$267

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 7/23

6:15 am-9:52 am

1 stop30h 37m

San Diego

Sun 7/27

8:31 am-12:02 am

1 stop12h 31m

$268

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Thu 7/17

6:00 am-2:13 pm

2 stops11h 13m

San Diego

Mon 7/21

6:15 am-5:27 pm

1 stop8h 12m

$269

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Thu 9/25

10:20 am-6:57 pm

1 stop11h 37m

San Diego

Mon 10/6

8:15 pm-9:22 am

1 stop10h 07m

$273

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Tue 8/12

10:30 am-5:53 pm

1 stop10h 23m

San Diego

Sat 8/16

10:47 am-10:20 pm

1 stop8h 33m

$277

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Mon 9/1

6:25 am-10:53 am

1 stop7h 28m

$122

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Mon 8/4

6:22 pm-9:55 am

1 stop18h 33m

$124

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Tue 7/29

7:10 am-12:22 pm

1 stop8h 12m

$139

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Tue 7/29

8:15 am-5:32 pm

2 stops12h 17m

$144

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Tue 9/30

10:30 am-4:30 pm

2 stops9h 00m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 June 27, 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 3, 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 18% 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 June 29, 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.

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 3, 2025.
Read through reviews of airlines operating flights from Philadelphia to San Diego, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

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
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

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
2,916 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

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
8,086 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

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 2 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), Frontier ($268), and JetBlue ($273) offers the cheapest pricing from Philadelphia to San Diego. Spirit Airlines is priced at 37% 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 Frontier, which is currently one of the cheapest options available, starting at $122. Spirit Airlines flights start at $124 while deals on Delta start at $139 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 Qatar Airways (87%), American Airlines (74%) or British Airways (61%) 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 $773, our data indicates the cheapest price to be $186. The most popular route (Philadelphia - San Diego), is priced around $137.

  • 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 Fountains of Bellagio more than anywhere else. Fremont Street Experience, The Colosseum at Caesars Palace, and Fountains of Bellagio are located about 5.9 mi, 2.6 mi, and 2.3 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 $54.

  • 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 Philadelphia?

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

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Alternative routes for Philadelphia to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$140Average$225FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$142Average$238FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$226Average$419FlexibilityNo cancel feeOn-time69%
DeltaCheapest$230Average$348FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$289Average$452FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$292Average$490FlexibilityNo cancel feeOn-time63%

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