On a nice, calm day a queen will fly a mile in 5 minutes. She can mate with 15 to 20 drones in 2 minutes. A mile out and a mile back equals 10 minutes plus mating time. A mile and a half is a total of 15 minutes plus 2 to mate, and that is what is probably most common in my area. I would say the range here is 17 to 23 minutes total time.