Cheap United flights from Philadelphia to San Diego (PHL→SAN)

Scoring cheap one-way United Airlines flights from PHL to SAN on Expedia is a breeze — just filter by "Price (lowest to highest)." Alternatively, check out our affordable round-trip fares for your next exciting getaway.*

*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 round-trip or one-way flights to San Diego in January or November. You could find lower fares with United Airlines during these off-peak travel months.

Fill in your dates, click search and check the "Nonstop" filter on Expedia to browse any direct flights from PHL to SAN with United Airlines or another airline.

San Diego Intl. Airport (SAN) is the primary San Diego hub for United Airlines flights from Philadelphia Intl. Airport (PHL).

Changes are generally free within 24 hours of making your booking, but your airline may charge a fee after that time. For more information about modifying your reservation, go to your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to change your plans without additional charges, tick the "Changes included" and "No cancel fee" filters when organising your next getaway.