Air Canada, for a short period of time in 1986, operated a helicopter shuttle from a helipad near downtown Toronto out to the tarmac at Toronto International Airport. <a href="http://gofar.aircanada.com/en/popular/legends-of-flight/" rel="nofollow">http://gofar.aircanada.com/en/popular/legends-of-flight/</a> (fifth image down).