United Flight 2123 Deals & Information (2026/2027)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Frequently asked questions

What route does flight number UA2123 take?
UA2123 takes 3 hours and 39 minutes to fly direct from Austin-Bergstrom Intl. Airport (AUS) to San Francisco Airport. Sure, there's magic in the destination, but the journey is always half the fun!
What kind of plane is on flight number UA2123?
The route for flight number UA2123 is generally Austin, TX Airport (AUS-Austin-Bergstrom Intl.) to San Francisco Intl. Airport (SFO), and the Airbus A319 is the type of plane you're likely to be flying with.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA2123 flight with Travelocity, please visit our Customer Service Portal.