United Flight 4456 Deals & Information (2026/2027)

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United Flight 4456 Route Deals From $239

The cheapest prices found with in the last 7 days for return flights were $184 and $239 for one-way flights to Appleton Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ATW
Appleton Intl.
$184 Roundtrip, found 2 days ago
$184
Roundtrip
found 2 days ago
Select United flight, departing Fri, May 15 from O'Hare Intl. to Appleton Intl., returning Sun, May 17, priced at $184 found 2 days ago
Sat, Mar 21 - Sun, Mar 22
ORD
O'Hare Intl.
ATW
Appleton Intl.
$188 Roundtrip, found 3 days ago
$188
Roundtrip
found 3 days ago
Select United flight, departing Sat, Mar 21 from O'Hare Intl. to Appleton Intl., returning Sun, Mar 22, priced at $188 found 3 days ago
Thu, Apr 2 - Sat, Apr 11
ORD
O'Hare Intl.
ATW
Appleton Intl.
$189 Roundtrip, found 6 days ago
$189
Roundtrip
found 6 days ago
Select United flight, departing Thu, Apr 2 from O'Hare Intl. to Appleton Intl., returning Sat, Apr 11, priced at $189 found 6 days ago
Thu, Apr 2 - Sat, Apr 11
ORD
O'Hare Intl.
ATW
Appleton Intl.
$191 Roundtrip, found 6 days ago
$191
Roundtrip
found 6 days ago
Select United flight, departing Thu, Apr 2 from O'Hare Intl. to Appleton Intl., returning Sat, Apr 11, priced at $191 found 6 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ATW
Appleton Intl.
$198 Roundtrip, found 2 days ago
$198
Roundtrip
found 2 days ago
Select United flight, departing Fri, May 15 from O'Hare Intl. to Appleton Intl., returning Sun, May 17, priced at $198 found 2 days ago
Thu, Apr 2 - Sat, Apr 11
ORD
O'Hare Intl.
ATW
Appleton Intl.
$213 Roundtrip, found 6 days ago
$213
Roundtrip
found 6 days ago
Select United flight, departing Thu, Apr 2 from O'Hare Intl. to Appleton Intl., returning Sat, Apr 11, priced at $213 found 6 days ago
Thu, Apr 2 - Sat, Apr 11
ORD
O'Hare Intl.
ATW
Appleton Intl.
$221 Roundtrip, found 6 days ago
$221
Roundtrip
found 6 days ago
Select United flight, departing Thu, Apr 2 from O'Hare Intl. to Appleton Intl., returning Sat, Apr 11, priced at $221 found 6 days ago
Sat, Mar 21 - Sun, Mar 22
ORD
O'Hare Intl.
ATW
Appleton Intl.
$222 Roundtrip, found 3 days ago
$222
Roundtrip
found 3 days ago
Select United flight, departing Sat, Mar 21 from O'Hare Intl. to Appleton Intl., returning Sun, Mar 22, priced at $222 found 3 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ATW
Appleton Intl.
$223 Roundtrip, found 2 days ago
$223
Roundtrip
found 2 days ago
Select United flight, departing Fri, May 15 from O'Hare Intl. to Appleton Intl., returning Sun, May 17, priced at $223 found 2 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ATW
Appleton Intl.
$233 Roundtrip, found 2 days ago
$233
Roundtrip
found 2 days ago
Select United flight, departing Fri, May 15 from O'Hare Intl. to Appleton Intl., returning Sun, May 17, priced at $233 found 2 days ago

Frequently asked questions

What route does flight number UA4456 take?
UA4456 takes a number of routes. The most frequently flown is O'Hare Intl. Airport (ORD) to BUF, which flies direct. This flight generally takes 1 hour and 39 minutes. However, there may possibly be other flights with the same number that are multi-stop.
What terminal does UA4456 fly out of?
Terminal 1 is where you'll most likely board from if you're booked on a flight leaving from O'Hare Intl. Airport (ORD). Chicago, IL Airport (ORD-O'Hare Intl.) to Buffalo Niagara International Airport is the most frequently traveled route for flight number UA4456.
What kind of plane is on flight number UA4456?
Chances are you'll be boarding a Canadair (Bombardier) Regional Jet 550 if you're on flight UA4456 from O'Hare Airport to BUF. It's the most commonly used type of plane on this particular route.
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 UA4456 flight with Travelocity, please visit our Customer Service Portal.