The aircraft had lined up for take-off on the runway at the Guru Ram Dass Jee international airport here when a crew member in the cockpit saw the dog moving near the plane.
The pilots immediately took the aircraft back to its parking area and all 171 passengers were asked to disembark.
The flight finally took off after a delay of three hours.
Airport director V.
Venkateswara Rao confirmed the incIdent.