$79 Cheap United flights Las Vegas (LAS) to San Diego (SAN)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines round-trip flights from $152 from LAS to SAN. Affordable one-way options from $79 are available too.**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.

January is one of the least expensive months to travel to San Diego with United Airlines. You could also find fantastic deals on return and one-way tickets in November.

For cheap United Airlines fares from Harry Reid Intl. Airport (LAS) to San Diego Intl. Airport (SAN), start searching one to three months before your intended departure. Reserving 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 affect the price you pay. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey 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.

Enter your dates, hit search and select the “Nonstop” filter on Expedia to browse any direct flights from LAS to SAN with United Airlines or other airlines.

To find the earliest departures from LAS to SAN with United Airlines, sort your results by “Morning” and “Early Morning.” Booking an early flight generally means 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.

United Airlines flights from Harry Reid Intl. Airport (LAS) to San Diego touch down at San Diego Intl. Airport (SAN). This is the main gateway here.

A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to fly from LAS to SAN with United Airlines. Plus, when you join Expedia’s free One Key™ program, you can receive OneKeyCash™* alongside United Airlines’s loyalty program earnings. It’s yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee will generally apply if you change or cancel your booking more than 24 hours after confirmation. To find tickets with more flexibility, select our “No cancel fee” or “Changes included” filter while searching for flights. For more information on canceling or changing your reservation, head to “Trips,” select your flight and click on “Manage Booking.”