United Flight 456 Deals & Information (2025/2026)

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United Flight 456 Route Deals From $81

The cheapest prices found with in the last 7 days for return flights were $145 and $81 for one-way flights to Austin-Bergstrom Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 26 - Mon, Sep 1
DEN
Denver Intl.
AUS
Austin-Bergstrom Intl.
$145 Roundtrip, found 5 hours ago
$145
Roundtrip
found 5 hours ago
Select United flight, departing Tue, Aug 26 from Denver Intl. to Austin-Bergstrom Intl., returning Mon, Sep 1, priced at $145 found 5 hours ago
Sat, Oct 18 - Tue, Oct 21
DEN
Denver Intl.
AUS
Austin-Bergstrom Intl.
$157 Roundtrip, found 3 days ago
$157
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 18 from Denver Intl. to Austin-Bergstrom Intl., returning Tue, Oct 21, priced at $157 found 3 days ago

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.