$139 Cheap United flights Green Bay (GRB) to San Diego (SAN)

Grab cheap round-trip United Airlines flights from $256 from GRB to SAN by organizing your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $139 for a one-way journey.**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.

United Airlines flights to San Diego tend to be cheaper in the low-season months of January and November. Whether you’re searching for a one-way or a return ticket, you could land a better deal then.

Begin your search one to three months ahead of your travel date to find cheap fares on United Airlines flights from Austin Straubel Intl. Airport (GRB) to San Diego Intl. Airport (SAN). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic journeys.*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 see if there’s a direct journey from GRB to SAN with United Airlines or another airline, check the “Nonstop” filter when searching for tickets.

Browse United Airlines’s earliest flights from GRB to SAN by checking the “Early Morning” and “Morning” filters. Not only will you get to where you’re going sooner, early departures also experience 20% fewer 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.

San Diego Intl. Airport (SAN) is the main San Diego hub for United Airlines flights from Austin Straubel Intl. Airport (GRB).

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

It’s usually possible to cancel or modify your flight, although there may be additional charges if you made your booking more than 24 hours ago. Prefer to keep your options open? Use Expedia’s “Changes included” and “No cancel fee” filters to find flights that won’t charge extra if you have to adjust your plans. To make changes, go to “Trips,” select your flight and click on “Manage Booking” for more details.