Some flights at Lufthansa’s leisure subsidiary Discover Airlines were disrupted on Sunday as pilots walked off the job for 48 hours over pay and working conditions. Discover Airlines, which until last September was known as Eurowings Discover, operates short, medium and long-haul service to popular tourist destinations using 24 aircraft. The airline said that 90% of its scheduled short and medium-haul flights from Frankfurt were expected to depart on time during the strike. But only around 30% of long-haul flights were to be operated. Discover flights from Frankfurt to Spain, Mexico and the Un…