United Flight UA4456 Deals & Information (2025/2026)

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.

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.

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.

For more info about changing your UA4456 flight with Travelocity, please visit our Customer Service Portal.