United Flight 255 Deals & Information (2026/2027)

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United Flight 255 Route Deals From $266

The cheapest prices found with in the last 7 days for return flights were $269 and $266 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Nov 22 - Fri, Nov 27
ATW
Appleton Intl.
DEN
Denver Intl.
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 22 from Appleton Intl. to Denver Intl., returning Fri, Nov 27, priced at $269 found 1 day ago
Tue, Sep 1 - Sun, Sep 6
ATW
Appleton Intl.
DEN
Denver Intl.
$275 Roundtrip, found 2 days ago
$275
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 1 from Appleton Intl. to Denver Intl., returning Sun, Sep 6, priced at $275 found 2 days ago
Sun, Nov 22 - Fri, Nov 27
ATW
Appleton Intl.
DEN
Denver Intl.
$279 Roundtrip, found 1 day ago
$279
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 22 from Appleton Intl. to Denver Intl., returning Fri, Nov 27, priced at $279 found 1 day ago
Wed, Sep 2 - Sat, Sep 5
ATW
Appleton Intl.
DEN
Denver Intl.
$286 Roundtrip, found 8 hours ago
$286
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Sep 2 from Appleton Intl. to Denver Intl., returning Sat, Sep 5, priced at $286 found 8 hours ago
Wed, Sep 2 - Sat, Sep 5
ATW
Appleton Intl.
DEN
Denver Intl.
$297 Roundtrip, found 8 hours ago
$297
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Sep 2 from Appleton Intl. to Denver Intl., returning Sat, Sep 5, priced at $297 found 8 hours ago
Sun, Nov 22 - Fri, Nov 27
ATW
Appleton Intl.
DEN
Denver Intl.
$301 Roundtrip, found 1 day ago
$301
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 22 from Appleton Intl. to Denver Intl., returning Fri, Nov 27, priced at $301 found 1 day ago
Wed, Oct 21 - Mon, Oct 26
ATW
Appleton Intl.
DEN
Denver Intl.
$302 Roundtrip, found 6 days ago
$302
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 21 from Appleton Intl. to Denver Intl., returning Mon, Oct 26, priced at $302 found 6 days ago
Sun, Nov 22 - Fri, Nov 27
ATW
Appleton Intl.
DEN
Denver Intl.
$303 Roundtrip, found 1 day ago
$303
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 22 from Appleton Intl. to Denver Intl., returning Fri, Nov 27, priced at $303 found 1 day ago
Wed, Nov 25 - Wed, Dec 2
ATW
Appleton Intl.
DEN
Denver Intl.
$305 Roundtrip, found 2 hours ago
$305
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Nov 25 from Appleton Intl. to Denver Intl., returning Wed, Dec 2, priced at $305 found 2 hours ago
Wed, Sep 2 - Sat, Sep 5
ATW
Appleton Intl.
DEN
Denver Intl.
$308 Roundtrip, found 8 hours ago
$308
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Sep 2 from Appleton Intl. to Denver Intl., returning Sat, Sep 5, priced at $308 found 8 hours ago

Frequently asked questions

What route does flight number UA255 take?
UA255 takes numerous routes. The most frequently flown is Austin, TX Airport (AUS-Austin-Bergstrom Intl.) to IAD, which is a direct flight. This flight generally takes 3 hours and 12 minutes. However, there are likely to be other flights with this number that are multi-stop.
How often is UA255 on time?
United Airlines flight number UA255 from Austin-Bergstrom Intl. Airport (AUS) to IAD arrives on schedule 85% of the time, which means you can be confident you will reach where you need to go ASAP. When it is running behind schedule, it is generally delayed by 49 minutes. This service has a 2.25-star rating.
What kind of plane is on flight number UA255?
There's every chance you'll be aboard the Airbus A319 if you're traveling from Austin-Bergstrom Intl. Airport (AUS) to IAD, one of several routes used for flight number UA255.
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 UA255 flight with Travelocity, please visit our Customer Service Portal.