United Flight UA4503 Deals & Information (2025/2026)

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United Flight 4503 Route Deals From $208

The cheapest prices found with in the last 7 days for return flights were $179 and $208 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number UA4503 take?
UA4503 takes approximately 1 hour and 40 minutes to fly straight from O'Hare Intl. Airport (ORD) to Knoxville Airport. We all know there's magic in the destination, but the journey is always half the fun!
What terminal does UA4503 fly out of?
Flight number UA4503 runs between ORD and McGhee Tyson Airport (TYS), and travelers taking this flight usually depart from Terminal 1.
What kind of plane is on flight number UA4503?
You'll most likely find yourself jumping on board the Canadair (Bombardier) Regional Jet 550 if you're booked on flight number UA4503. This flight usually departs from O'Hare Intl. Airport (ORD) and lands at Knoxville Airport.
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 UA4503 flight with Travelocity, please visit our Customer Service Portal.