HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$120+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SAN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 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 June 12, 2025.

Round-trip from

$267
(FlightHub)

One-way from

$120
(Mytrip)

Popular in

December

Cheapest in

January

Average price

$447

Good round-trip deal

$360 or less

Good one-way deal

$198 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. 0% potential increase in price ($0 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/256:20 pmPHL - SAN
1 stop8h 09mSpirit Airlines
Fri 7/411:55 amSAN - PHL
1 stop15h 55mSpirit Airlines
Deal found 6/9$267
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
Fri 6/277:19 amPHL - SAN
1 stop7h 45mFrontier
Wed 7/26:51 pmSAN - PHL
1 stop7h 58mFrontier
Deal found 6/11$272
This JetBlue deal was found by Cheapflights users on 6/10. 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.
Wed 9/1710:20 amPHL - SAN
1 stop11h 37mJetBlue
Sat 9/208:15 pmSAN - PHL
1 stop10h 07mJetBlue
Deal found 6/10$273
This FlightHub deal was found by Cheapflights users on 6/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/26:20 pmPHL - SAN
1 stop8h 09mMultiple Airlines
Wed 7/167:04 pmSAN - PHL
1 stop7h 45mMultiple Airlines
Deal found 6/12$294
This Delta deal was found by Cheapflights users on 6/12. 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.
Sat 8/25:30 amPHL - SAN
1 stop9h 50mDelta
Tue 8/56:15 amSAN - PHL
1 stop10h 14mDelta
Deal found 6/12$314
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Wed 8/138:50 amPHL - SAN
Nonstop5h 30mAmerican Airlines
Sat 8/1610:54 pmSAN - PHL
Nonstop5h 21mAmerican Airlines
Deal found 6/12$323
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/107:20 amPHL - SAN
1 stop10h 28mAlaska Airlines
Tue 9/233:45 pmSAN - PHL
1 stop11h 15mAlaska Airlines
Deal found 6/10$342
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:05 pmPHL - SAN
1 stop10h 20mSouthwest
Sun 11/166:20 amSAN - PHL
2 stops10h 00mSouthwest
Deal found 6/10$346

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 June 12, 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 6/25

6:20 pm-11:29 pm

1 stop8h 09m

San Diego

Fri 7/4

11:55 am-6:50 am

1 stop15h 55m

$267

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Fri 6/27

7:19 am-12:04 pm

1 stop7h 45m

San Diego

Wed 7/2

6:51 pm-5:49 am

1 stop7h 58m

$272

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 9/17

10:20 am-6:57 pm

1 stop11h 37m

San Diego

Sat 9/20

8:15 pm-9:22 am

1 stop10h 07m

$273

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 7/2

6:20 pm-11:29 pm

1 stop8h 09m

San Diego

Wed 7/16

7:04 pm-5:49 am

1 stop7h 45m

$294

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Sat 8/2

5:30 am-12:20 pm

1 stop9h 50m

San Diego

Tue 8/5

6:15 am-7:29 pm

1 stop10h 14m

$314

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 8/13

8:50 am-11:20 am

Nonstop5h 30m

San Diego

Sat 8/16

10:54 pm-7:15 am

Nonstop5h 21m

$323

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 9/10

7:20 am-2:48 pm

1 stop10h 28m

San Diego

Tue 9/23

3:45 pm-6:00 am

1 stop11h 15m

$342

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Thu 11/6

4:05 pm-11:25 pm

1 stop10h 20m

San Diego

Sun 11/16

6:20 am-7:20 pm

2 stops10h 00m

$346

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Sun 9/7

6:30 am-8:14 am

1 stop28h 44m

$120

PhiladelphiaSan Diego

PHL - SAN

PHLSAN

Philadelphia

Wed 9/10

10:30 am-3:45 pm

1 stop8h 15m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 17 results
1
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 9, 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 June 12, 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 8, 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 June 12, 2025.

The most flights from PHL to SAN are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

Plan your trip to San Diego by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Philadelphia to San Diego to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 7 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 ($272), 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 Spirit Airlines, which is currently one of the cheapest options available, starting at $120. Southwest flights start at $147 while deals on JetBlue start at $179 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 British Airways (63%), American Airlines (60%) or Qatar Airways (60%) 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 $768, our data indicates the cheapest price to be $135. The most popular route (Philadelphia - San Diego), is priced around $170.

  • 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 $55.

  • 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
National City
Imperial Beach
La Mesa
Alpine
Lemon Grove
Poway
Santee
Coronado

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
Newark to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Newark to Las Vegas flights
Newark to San Francisco flights
LaGuardia to Los Angeles flights
Dulles Intl to Los Angeles flights
Reagan-National to Los Angeles flights
LaGuardia to Las Vegas flights
John F Kennedy Intl to Ontario flights
Newark to Burbank flights
Dulles Intl to San Francisco flights
LaGuardia to San Francisco flights
Dulles Intl to Las Vegas flights
Newark to Santa Ana flights
John F Kennedy Intl to San Diego flights
Newark to San Diego flights
Reagan-National to Las Vegas flights
Philadelphia to Las Vegas flights
Reagan-National to San Francisco flights
Newark to Ontario flights
LaGuardia to Burbank flights
Newark to Oakland flights
LaGuardia to Ontario flights
Philadelphia to San Francisco flights
Dulles Intl to San Diego flights
LaGuardia to Santa Ana flights
Reagan-National to San Diego flights
Dulles Intl to Ontario flights
Newark to San Jose flights
LaGuardia to San Diego flights
John F Kennedy Intl to Santa Ana flights
LaGuardia to Oakland flights
Philadelphia to Los Angeles flights
John F Kennedy Intl to San Jose flights
Pittsburgh to Las Vegas flights
Reagan-National to Ontario flights
Reagan-National to Santa Ana flights
John F Kennedy Intl to Reno flights
Newark to Sacramento flights
Dulles Intl to San Jose flights
Newark to Reno flights
John F Kennedy Intl to Long Beach flights
Philadelphia to Ontario flights
Dulles Intl to Sacramento flights
LaGuardia to San Jose flights
Dulles Intl to Santa Ana flights
John F Kennedy Intl to Sacramento 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$139Average$242FlexibilityNo cancel feeOn-time65%
FrontierCheapest$141Average$225FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$158Average$398FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$354FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$290Average$457FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$292Average$490FlexibilityNo 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.