How far can a helicopter fly for before running out of fuel?

The distance a helicopter can fly before running out of fuel varies significantly based on its model, fuel capacity, and flight conditions. Generally, most helicopters have a range of about 250 to 500 miles (400 to 800 kilometers) on a full tank. For example, a Bell 206 might have a range of approximately 400 miles, while larger helicopters like the Sikorsky S-76 can fly further. Factors like weight, load, and weather conditions can also affect fuel consumption and range.