A total of 954 delegates joined the event, including tourism representatives, with teams from 110 airlines and 170 airports also present.
Routes brand director Steven Small said tourism authorities have an increasingly important part to play in making the arguments required to win new routes.
He added: “Airlines might fly to airports but travellers fly to destinations, so airlines are keen to find out what will drive the numbers on a new route.
“Tourist boards are perfectly placed to provide this information and will also have in-depth information about the type of traveller the destination attracts.
“They are also increasingly providing marketing support for new routes in conjunction with the airports and can highlight anything from cultural events to new hotel openings that will further drive traveller numbers.
“We are increasingly seeing them attend Routes events and feel confident that this is a trend that will only grow as they and their airport partners understand the value that they can bring to any negotiation.”