$224 Cheap United flights Casper (CPR) to San Diego (SAN)

Landing cheap one-way United Airlines flights from CPR to SAN from $224 on Expedia is a cinch — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares from $248 for your next exciting vacation.**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 one-way or return flights to San Diego in January or November. You could find lower fares with United Airlines during these off-peak months.

For cheap United Airlines fares from Natrona County Intl. Airport (CPR) 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 impact the overall cost. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip 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.

To find out if there’s a direct journey from CPR to SAN with United Airlines or another carrier, select the “Nonstop” filter when searching for flights.

Find United Airlines’s earliest flights from CPR to SAN by checking our “Morning” and “Early Morning” filters. Not only will you get to where you’re going sooner, early departures are also 20% 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.

United Airlines flights from Natrona County Intl. Airport (CPR) to San Diego arrive at San Diego Intl. Airport (SAN). This is the main entry point to this destination.

With a rewarding loyalty program, United Airlines is a top pick for many passengers departing from CPR to SAN. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can cancel or reschedule your flight, although additional fees may apply if you made your booking over 24 hours ago. Want to keep your options open? Use our “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you need to revise your plans. To modify your booking, visit “Trips,” select your flight and click on “Manage Booking” for more details.