$125 Cheap Alaska Airlines flights Philadelphia (PHL) to San Jose (SJC)

Scoring cheap one-way Alaska Airlines flights from PHL to SJC from $125 on Expedia is easy --- just filter by "Price (lowest to highest)." Or check out our budget-friendly round-trip fares from $317 for your next exciting adventure.**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.

Look for affordable Alaska Airlines flights from Philadelphia Intl. Airport (PHL) to Norman Y. Mineta San Jose Intl. Airport (SJC) one to three months ahead of your 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. Regardless of fare class and journey, the best day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book 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.

Filter your results by "Morning" and "Early Morning" to find the earliest flights from PHL to SJC. Jetting off early means you're 20% less likely to experience cancellations.**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.

Offering top-tier customer service and an excellent in-flight experience, Alaska Airlines is a top choice for many passengers heading from PHL to SJC. 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 getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.