British Airways (BA) pilots have voted in favour of strike action over pay.
The British Airline Pilots' Association (Balpa) said 93% of its members had voted in the ballot, which took place 22 July, in favour of industrial action.
The earliest that a stoppage could begin is 5 August, strike action is set to cause severe delays over the key summer holiday period. Balpa represents about 90% of the airline's pilots.
In a statement , BA said it was "very disappointed" that the union was threatening "the travel plans of thousands of our customers".
British Airways said it remained open to working with the union to reach an agreement and continued to "pursue every avenue to find a solution to protect our customers' travel plans and avoid industrial action".
Pilots have rejected BA's offering of 11.5% rise over three years, which the airline says is "fair and generous".
Balpa argues that its members deserve a better offer, as BA has been making healthy profits.
British Airways said it remained open to working with the union to reach an agreement and continued to "pursue every avenue to find a solution to protect our customers' travel plans and avoid industrial action".