Pilots at Delta Air Lines Inc. subsidiary Comair Inc. have voted overwhelmingly to back their union’s effort to strike should the commuter airline attempt to terminate their labor contract.

The Air Line Pilots Association said in a statement Monday night that more than 93 percent of Comair pilots who voted supported a strike, putting more pressure on the Erlanger, Ky.-based airline to reach a consensual deal with the union. The union did not say how many of Comair’s 1,500 pilots cast a ballot.