Thomas Cook said it is ‘working hard’ to avert the threat of strike action by pilots over pay.
Members of the British Airline Pilots’ Association (BALPA) who are employed by Thomas Cook took part in a ballot on Friday.
Of those that voted, 80% voted for strike action.
They are believed to be unhappy about being offered a 1.5% pay rise on top of an automatic increase on 1.8% and are demanding a 10.7% rise.
They also want to travel business class when connecting to their flights.
BALPA is meeting today to discuss final approval of industrial action, which could start next month.
Thomas Cook Airlines said in a statement: "It is in everyone’s interest to reach a settlement which is why we have put forward what we believe to be a very fair offer in what is a competitive market.
"We are working hard with BALPA’s representatives to find a way forward."
