Brussels Airlines will cancel between 70 and 80 percent of scheduled flights on Saturday after pilots called for a wildcat strike. “We regret that the pilot unions are calling for a wildcat strike tomorrow,” a Brussels Airlines spokeswoman said after the 24-hour strike was announced on Friday. She would not give precise figures on cancelled flights. “We call on the unions to join us around the table to continue the exchanges and avoid unnecessary damage to Brussels Airlines,” she said. “We apologise to all passengers” who will be affected, the spokeswoman added. The airline declined to make public the labour issue behind the strike. But one of the three pilots’ unions, BBTK, told the Belga news agency that it was over non-wage benefits and resistance by the airline to increase them in line with inflation. Another union urged cabin crew personnel to take part to demand a “salary increase” and the better division of labour among workers. The Belgian flag carrier, owned by Lufthansa and part of the Star Alliance, operates some 39 aircraft and flies to more than 85 destinations.