American Airlines Flight AA4121 Deals & Information (2025/2026)

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American Airlines Flight 4121 Route Deals From $181

The cheapest prices found with in the last 7 days for return flights were $332 and $181 for one-way flights to Charlotte-Douglas Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number AA4121 take?
AA4121 takes approximately 1 hour and 35 minutes to fly non-stop from O’Hare Airport to Buffalo, NY Airport (BUF-Buffalo Niagara Intl.). We all know there’s magic in the destination, but half the fun is in the journey!
What terminal does AA4121 fly out of?
AA4121 runs between O’Hare Intl. Airport (ORD) and Buffalo Niagara Intl. Airport (BUF), and passengers with a seat on this flight generally jet off from Terminal 3.
What kind of plane is on flight number AA4121?
The Embraer RJ145 is the type of plane most often used for flight AA4121. More often than not, this flight sets off from ORD and touches down at Buffalo, NY Airport (BUF-Buffalo Niagara Intl.).
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 AA4121 flight with Travelocity, please visit our Customer Service Portal.