Air Transat just celebrated its 30th anniversary in 2017, carrying nearly 4.5 million passengers to approximately 60 destinations in 26 countries every year. Fly direct from Glasgow to Toronto & Vancouver (with connecting flights to Calgary & Montreal).
Note, on Saturday's only starting 5th May to the 9th June inclusive, Air Transat flights TSC525 to Toronto check-in desks will move to Terminal 1. After the 9th June check-in will go back to Terminal 2.
In total this Terminal swap will happen on 7 occasions: 5th May, 12th May, 19th May, 26th May, 2nd Jun and 9th Jun.