United Flight 456 Deals & Information (2026/2027)

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Frequently asked questions

What route does flight number UA456 take?
Flight number UA456 takes roughly 2 hours and 16 minutes to jet directly from Austin–Bergstrom International Airport to Denver, CO Airport (DEN-Denver Intl.). Sure, there's magic in the destination, but getting there is half the fun!
What kind of plane is on flight number UA456?
The route for UA456 is nearly always Austin, TX Airport (AUS-Austin-Bergstrom Intl.) to Denver Intl. Airport (DEN), and the Airbus A319 is the type of aircraft you'll probably be jetting off 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 UA456 flight with Travelocity, please visit our Customer Service Portal.