$148 Cheap Alaska Airlines flights Philadelphia (PHL) to San Diego (SAN)

Finding cheap one-way Alaska Airlines flights from PHL to SAN from $148 on Expedia is easy — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares for your next break.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines flights to San Diego are generally more affordable in the low-season months of January and November. Whether you’re searching for a return or one-way ticket, you could land a better deal then.

Search for cheap Alaska Airlines flights from Philadelphia Intl. Airport (PHL) to San Diego Intl. Airport (SAN) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Click on the “Nonstop” filter when looking for direct Alaska Airlines flights from PHL to SAN. It’s also an easy way to compare other carriers servicing the same nonstop route.

Browse Alaska Airlines’s earliest flights from PHL to SAN by using our “Morning” and “Early Morning” filters. Not only will you get to where you’re going sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

San Diego Intl. Airport (SAN) is the main San Diego gateway for Alaska Airlines flights from Philadelphia Intl. Airport (PHL).

With a rewarding loyalty program and an excellent in-flight experience, Alaska Airlines is a favorite for many passengers flying from PHL to SAN. What’s more, if you’re a Mileage Plan and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee may apply if you modify or cancel your booking more than 24 hours after confirmation. To find tickets with more flexibility, select our “Changes included” or “No cancel fee” filter when you look for flights. For additional information on changing or canceling your reservation, visit “Trips,” select your flight and click on “Manage Booking.”