$59 Cheap Southwest Airlines flights Phoenix (PHX) to San Diego (SAN)

Landing cheap one-way Southwest Airlines flights from PHX to SAN from $59 on Expedia is easy — just filter by "Price (lowest to highest)." Alternatively, check out our affordable return fares from $97 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.

Search for affordable Southwest Airlines flights from Sky Harbor Intl. Airport (PHX) to San Diego Intl. Airport (SAN) one to three months before your departure day. 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 type and itinerary, the best day to book a domestic flight is generally 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 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.

The earliest Southwest Airlines flight from PHX to SAN departs at 7:20AM UTC-7, touching down at 7:40AM UTC-8. If you want to head off later, the last Southwest Airlines flight leaves PHX at 9:35PM UTC-7 and lands at SAN at 9:55PM UTC-8. Flying before midday is often a good idea as morning and mid-morning flights are less likely to be 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.