The decision to expand could not have been timed better by the authorities governing Glasgow Airport. For years arguements had raged and even Parliamentary Questions had been tabled concerning Prestwick Airport's monopoly on Transatlantic flights. Glasgow Airport felt that this Government Directive was hampering their expansion plans and that Glasgow was a far more logical choice as Scotland's International Gateway. The Government reviewed this decision and decided that Trans-Atlantic carriers no longer had to fly from Prestwick. Following this decision, flagship carriers Air Canada and Northwest Orient (later Northwest Airlines), transferred their services from Prestwick, they were later joined briefly by United Airlines. Although during the 1990's Northwest and United stopped services from Glasgow, these services were quickly replaced by a daily, year round service by Continental Airlines and a daily service during the summer season May to October by American Airlines. A large number of package operators also began to fly to the States and Canada, including operators such as Air 2000, Air Tours, Britannia, JMC, Canada 3000 and Transat.