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Cheap flights from San Diego to Philadelphia from £99

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — PHL
21 May — 28 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Diego to Philadelphia

Enter your travel dates to find the best prices.

Cheapest flights from San Diego to Philadelphia
Explore the most affordable flight options available from San Diego to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 April 2026.

Wed 16/906:55
SAN
-
PHL
1 stop8h 05m
Southwest
Sun 20/906:45
PHL
-
SAN
2 stops16h 30m
Southwest
Deal found 19/4£283
Mon 11/506:15
SAN
-
PHL
1 stop20h 47m
Alaska Airlines
Tue 12/509:05
PHL
-
SAN
2 stops12h 26m
Alaska Airlines
Deal found 20/4£297
Sat 27/611:30
SAN
-
PHL
2 stops9h 35m
Southwest
Tue 30/616:35
PHL
-
SAN
1 stop9h 45m
Southwest
Deal found 17/4£300
Sat 25/706:15
SAN
-
PHL
1 stop9h 47m
Delta
Wed 5/806:05
PHL
-
SAN
1 stop7h 22m
Delta
Deal found 20/4£304
Sat 23/522:30
SAN
-
PHL
1 stop11h 20m
Southwest
Sat 30/516:30
PHL
-
SAN
2 stops9h 55m
Southwest
Deal found 17/4£308
Wed 10/612:10
SAN
-
PHL
2 stops9h 50m
Southwest
Wed 1/716:35
PHL
-
SAN
2 stops9h 05m
Southwest
Deal found 16/4£311
Mon 28/906:45
SAN
-
PHL
1 stop8h 10m
Southwest
Thu 1/1005:25
PHL
-
SAN
1 stop7h 35m
Southwest
Deal found 21/4£314
Wed 10/612:10
SAN
-
PHL
2 stops9h 50m
Southwest
Wed 17/606:20
PHL
-
SAN
2 stops14h 25m
Southwest
Deal found 20/4£316
Thu 20/806:45
SAN
-
PHL
1 stop8h 10m
Southwest
Sun 23/805:00
PHL
-
SAN
2 stops8h 55m
Southwest
Deal found 19/4£317
Wed 27/508:04
SAN
-
PHL
2 stops18h 31m
Alaska Airlines
Tue 9/616:45
PHL
-
SAN
1 stop20h 20m
Alaska Airlines
Deal found 19/4£324
Tue 16/612:10
SAN
-
PHL
2 stops9h 50m
Southwest
Wed 24/616:35
PHL
-
SAN
2 stops9h 15m
Southwest
Deal found 16/4£328
Tue 5/506:20
SAN
-
PHL
2 stops8h 45m
Southwest
Sat 9/505:35
PHL
-
SAN
2 stops9h 30m
Southwest
Deal found 19/4£331

Find flight deals from San Diego to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Philadelphia (PHL). 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 21 April 2026.

Round-trip from

£283

One-way from

£99

Popular in

December

Cheapest in

October

Average price

£360
Southwest
  • Southwest
  • 16/9-20/9
  • 3 total stops
  • 24h 35m total
  • San Diego to Philadelphia
Search Deals
Southwest
  • Southwest
  • 1/9
  • 1 total stop
  • 8h 05m total
  • San Diego to Philadelphia
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Diego to Philadelphia 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 858,174 searches. Data last updated 21 April 2026.
Use the filters below to find and compare flights from San Diego to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Wed 10/6

12:10-01:00

2 stops9h 50m

Philadelphia

Wed 1/7

16:35-22:40

2 stops9h 05m

£311

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Tue 16/6

12:10-01:00

2 stops9h 50m

Philadelphia

Tue 23/6

16:35-22:50

2 stops9h 15m

£328

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Fri 22/5

13:05-00:35

2 stops8h 30m

Philadelphia

Tue 26/5

05:50-12:10

2 stops9h 20m

£348

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Tue 9/6

06:35-18:40

2 stops9h 05m

Philadelphia

Mon 15/6

05:00-11:20

2 stops9h 20m

£348

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Mon 28/9

20:58-15:44

2 stops15h 46m

Philadelphia

Thu 1/10

16:44-10:05

1 stop20h 21m

£352

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Sat 2/5

16:49-06:02

1 stop10h 13m

Philadelphia

Tue 5/5

07:22-15:53

1 stop11h 31m

£356

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Fri 31/7

12:55-00:40

2 stops8h 45m

Philadelphia

Tue 4/8

06:00-12:05

2 stops9h 05m

£360

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Mon 22/6

17:10-10:50

2 stops14h 40m

Philadelphia

Sat 4/7

08:10-14:15

2 stops9h 05m

£365
Fastest return journey

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Thu 18/6

19:13-06:08

1 stop7h 55m

Philadelphia

Mon 22/6

05:40-10:43

1 stop8h 03m

£366

San DiegoPhiladelphia

SAN - PHL

SANPHL

San Diego

Sun 14/6

22:17-08:44

1 stop7h 27m

Philadelphia

Thu 25/6

12:07-19:42

1 stop10h 35m

£366

Flights are sorted by cheapest return flights first.

Deals found on 19/4

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from San Diego to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from San Diego with our price prediction graph.
Estimated return 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 San Diego to Philadelphia

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

Use this chart to determine the optimal time to book a return flight from San Diego to Philadelphia. Price data was last updated on 17 April 2026.

To ensure you get the cheapest price possible for a flight from San Diego to Philadelphia, you should look to book at least 21 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 San Diego to Philadelphia?

Currently, October is the cheapest month in which you can book a flight from San Diego to Philadelphia (average of £277). Flying from San Diego to Philadelphia in December is currently the most expensive (average of £367). 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 SAN to PHL?

Find hourly flight availability from San Diego to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Diego to Philadelphia as you normally would.

How much does it cost for a return flight from San Diego to Philadelphia?

Related info for your journey

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

  • How popular is this San Diego to Philadelphia flight route?

    The San Diego to Philadelphia flight path was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from San Diego to Philadelphia?

    Airlines like Southwest and Alaska Airlines fly from San Diego to Philadelphia in about 9h 50m. The time it takes to get you to your destination can typically vary by up to 5h 56m. There are 2364 mi between San Diego and Philadelphia. This flight may include one or multiple stops.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Diego to Philadelphia on time: Iberia (91%), American Airlines (88%), British Airways (84%).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Diego to Philadelphia 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 San Diego to Philadelphia?

    Currently, October is the cheapest month in which you can book a flight from San Diego to Philadelphia (average of £277). Flying from San Diego to Philadelphia in December is currently the most expensive (average of £367). 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

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When you search for this flight from San Diego to Philadelphia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Philadelphia?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Philadelphia from San Diego.

Can Cheapflights find flights from San Diego to Philadelphia with no change fees?

Yes! Cheapflights helps users easily find flights from San Diego to Philadelphia with no change fees.

Can Cheapflights notify me if prices for flights from San Diego to Philadelphia become cheaper?

Yes, Cheapflights offers price alerts on San Diego to Philadelphia flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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