"It's the consumer message behind it."
Paquette said about 1600 other plaintiffs have come forward in Quebec to join the lawsuit.
The lawsuit alleges that references to champagne - a sparkling wine produced specifically in the Champagne region of France - was front and centre of Sunwing's marketing materials.
But in an emailed statement to the BBC, Sunwing said the terms "champagne vacations" and "champagne service" were used "to denote a level of service in reference to the entire hospitality package" and not to specifically describe the in-flight beverages.
The class action has yet to be certified by the courts, but seeks compensation for the monetary difference between the actual wine served and a glass of champagne as well as punitive damages.
The airline has confirmed that it still offers sparkling wine to all its passengers on flights to southern vacation destinations, but are no longer referencing "champagne service" in active marketing campaigns.
However, it also claimed that it has always described these services as including "a complimentary welcome glass of sparkling wine" and announce it as such on the aircraft.