$640 Cheap United flights Lima (LIM) to San Diego (SAN)

Make use of the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines round-trip flights from $737 from LIM to SAN. Affordable one-way tickets from $640 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.

To discover cheap flights from LIM to SAN with United Airlines, begin your search about one month before your intended departure. You can save 17% when you lock in your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another good tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**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.

To find the earliest departure from LIM to SAN with United Airlines, filter your results by "Early Morning" and "Morning." Choosing an early flight usually means you're 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.

A rewarding loyalty program and the chance to rack up points through United Mileage Plus are the start of the reasons to fly from LIM to SAN with United Airlines. Plus, when you sign up to our One Key™ program, you can receive OneKeyCash™* in addition to 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.