It depends on the model. The B-17E could get up to around 520km/hr top speed, while the variant produced in the most numbers, the B-17G, was capable of 460 km/hr, the speed reduction occurring in large part due to the higher defensive armament, with 13 .50 cal machine guns, two of them in a chin turret which increased drag.
I think they can fly pretty fast.
humming birds fly so fast because they are so fast
fast
1 h 21 min (104.1 km) via B17 and B17
As fast as you can throw them ;)
Fast enough.
How fast is an albatross
B17 is a relative reference. $B$17 is an absolute reference. See the related question below.
bobwhites can fly quite fast but I am not exactly sure of how fast
nope.... run fast but not fly
10
They fly about 40mph