It takes approximately 76 years for Halley's Comet to orbit the Sun. This is based on its average orbital period, not its current distance from the Sun.

While the average distance (semi-major axis) of Halley's Comet from the Sun is 17.8 AU (astronomical units), this distance can vary significantly during its orbit. The comet's path is highly elliptical, taking it as close as 0.59 AU from the Sun (closer than the Earth's orbit) and as far out as 35.1 AU (beyond the orbit of Neptune).

The orbital period is determined by the comet's entire elliptical path, not just its average distance.