United Airlines announced the addition of two new routes originating from its Chicago O'Hare hub.

The new services will connect Chicago with Erie, Pennsylvania, and Tri-Cities, Tennessee.

This expansion directly counters a recent network move by competitor American Airlines. Both carriers operate major hubs at O'Hare, vying for long-term dominance. The route additions are a strategic tool in the ongoing battle for passenger share and crucial gate access at the busy airport.