The airport saw an additional one million additional passengers use the facility - a increase of 13 per cent on 2014.
The airport, which celebrates its 50th anniversary this year, also experienced unprecedented growth during each month of 2015 with December recording more than 590,000 passengers - an increase of 10 per cent on 2014.
Over the past 12 months the airport announced 30 new routes and services, significantly strengthened its connections to major European cities and cemented its position as Scotland’s principal long haul airport.
The new services led to uplifts in both international and domestic traffic over the year – up by 16.8 per cent and 9 per cent respectively.
The airport was also classified as one of the fastest growing airports in Europe by airport trade body ACI Europe.
Amanda McMillan, managing director of Glasgow Airport, said: “2015 was exceptional in so many respects and we start our golden anniversary year in an incredibly strong position.
“Welcoming an additional one million passengers through our doors last year was a huge accomplishment, but by far the most pleasing aspect was the extent to which we bolstered our connections to European cities such as Budapest, Prague, Milan and Bucharest.
“2016 marks the airport’s 50th anniversary and we are determined to ensure this year makes the history books. Over the coming months we will welcome two major flag carriers in the form of Air Canada Rouge and Air France, and a new service to Montreal will commence with Air Transat. With these airlines, and others, coming on board we anticipate that 2016 will be our busiest year ever - topping nine million passengers for the first time in our history and putting us on a trajectory towards 10 million.
“As well as developing our growing route network, we will also continue to invest in our terminal and facilities in 2016 and will shortly unveil details of our terminal redevelopment plan.”
December’s performance ensured Glasgow Airport ended what was a hugely successful year on a high. As well as announcing a new daily service to Paris Charles de Gaulle with Air France starting in March, new services to Milan, Salzburg and Bucharest got underway, and Virgin Atlantic announced it will begin a new service to Orlando for winter 2016.