$79 Cheap United flights Sacramento (SMF) to San Diego (SAN)

Finding cheap one-way United Airlines flights from SMF to SAN from $79 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $166 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.

Browse for one-way or round-trip flights to San Diego in January or November. You could find cheaper fares with United Airlines during these off-season months.

For cheap United Airlines fares from Sacramento Intl. Airport (SMF) to San Diego Intl. Airport (SAN), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence what you pay. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**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.

Use the “Nonstop” filter when looking for direct United Airlines flights from SMF to SAN. It’s also an easy way to compare other airlines servicing the same nonstop route.

Filter your results by “Early Morning” and “Morning” to find the earliest flights from SMF to SAN. Jetting off early means flight cancellations are less likely.**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.

Board a United Airlines flight from Sacramento Intl. Airport (SMF) to San Diego, and you’ll probably land at San Diego Intl. Airport (SAN). This is the airline’s main hub in this destination.

Travel from SMF to SAN with United Airlines and you’ll enjoy a host of benefits starting with a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you can also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of fare you purchased, a fee will generally apply if you cancel or reschedule your booking more than 24 hours after confirmation. To secure tickets with more flexibility, select our “Changes included” and “No cancel fee” boxes when you search for flights. For more details on modifying or canceling your reservation, visit “Trips,” select your flight and tick “Manage Booking.”