In general, most helicopters can fly for an extended period of time or a significant distance before needing to stop or refuel. Typically, this equates to 2.5 to 5 hours on one tank of gas, which translates to a range of 320 to 640 km. Of course, not all helicopters are capable of this.
Usually we fly around 100 MPH. Helicopters accelerate to cruise speed fairly rapidly. In a no wind situation, typical multi engine medium sized helicopters could takeoff (less then one minute to max cruise A/S) traverse 30NM and land in about 13 minutes.
TIL the Longest Helicopter Flight was 2,213 Miles and 15 Hours 18 Minutes Long by Bob Ferry in 1966. He Flew Non-stop from Culvert City, California to Daytona Beach, Florida in a Hughes OH-6A Cayuse.
Can you fly international in a helicopter? Absolutely, an around-the-world trip in a helicopter is possible, but it's no small feat. In fact, it's a gargantuan task that has been achieved a few times. The key factor is the helicopter's range which is typically much less than airplanes, meaning more stops for refueling.
AW101 All-Weather capabilities highlighted in 4,800 nm transit across the North Atlantic. The AW101 helicopter successfully completed an epic journey across the North Atlantic to return to the UK across mountains, high seas, storm clouds, ice, and snow.
HELICOPTERS. Helicopters can be flown at night and they are often used in search and rescue missions after dark, as well as for purposes of patrolling the streets by the police. Helicopters are generally not as stable as aeroplanes, but with the necessary training, a helicopter pilot can safely fly a helicopter.
According to the National Transportation Safety Board (NTSB), helicopters crash at a higher rate than airplanes. The crash rate for general aircraft is 7.28 crashes per 100,000 hours of flight time. For helicopters, that number is 9.84 per 100,000 hours.