My run is 6 ft tall, and ALL the EEs fly over it!!! Well that is, until they got a wing clipped night before last.
I know mine can fly about 8 ft, cause they rafters in the shed were that tall, and they were flying up there to roost. I lowered them a bit though. Still about 6 ft high, and they get up there OK.
My heavy breeds don't fly as high. They can fly about `1.5ft off the ground and zoom across the yard though!