Complex sentence: Air Hong Kong was established in November 1986, commenced charter services with a Boeing 707-320C freighter on 4 February 1988, to Bombay (now known as Mumbai), Britain and Kathmandu; and scheduled services began on 18 October 1989.
Split into simpler sentences: Air Hong Kong was founded in November 1986 and commenced charter services with a Boeing 707-320C freighter on 4 February 1988. The airline commenced charter services with a Boeing 707-320C freighter on 4 February 1988, to Bombay (now known as Mumbai), Britain and Kathmandu; and scheduled services began on 18 October 1989.