May’s performance represents a rise of 4.3% against the same month last year, with domestic and international traffic up 1.6% and 6.9% respectively.
Growth was driven primarily by Thomson, Lufthansa and KLM adding capacity on European routes, while Jet2’s fifth based aircraft also began operating during the month.
Virgin Atlantic and US Airways added capacity on their North American routes, while demand for flights to London continues to drive domestic growth.
US Airways celebrated the 10th anniversary of its popular Philadelphia service in May, while Thomas Cook announced a new weekly Las Vegas flight for summer 2015 and Icelandair added additional capacity in September to cater for a rise in demand around the Ryder Cup.
Amanda McMillan, managing director of Glasgow Airport, said: “May always gives us a taste of what to expect during our busiest months, with the summer timetable well underway and a real buzz in the terminal.
“With less than 50 days to go until the opening ceremony of the Commonwealth Games in Glasgow, our focus now is to ensure that our multi-million pound investment programme is completed in time. The check-in hall is looking fantastic and the improvements we are making to the international arrivals area are well underway.
“We are also working with a range of partners to ensure Glasgow Airport is ready to play its part in delivering a successful and memorable event for the city.”