How fast are civilian helicopters?

As a general rule, most helicopters fly at an average speed of around 140 knots. This equals to about 160 mph or 260 km/h.

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How fast can helicopters fly?

The Top Speed for most single-engine helicopters is around 150 kts or 173 mph. Most will not reach this but instead cruise around 110 kts or 127 mph. The Top Speed for most Twin engine helicopters is around 160 kts or 185 mph. The world record holder G-LYNX flew at 223 kts or 257mph!