Air France has cancelled two flights between Paris and Sofia scheduled for Sunday, 12 June, due to strike of pilots at the French flag carrier.

Flights AF1788 from Paris to Sofia and AF1789 from Sofia to Paris that were scheduled for Sunday afternoon, have been cancelled, according to information from Sofia International Airport.

Air France also cancelled its flights between Paris and Bulgaria's capital on Saturday as part of a 30% cut in the number of destinations for the day.

Several French pilot unions have called for strike action to protest government plans to reform the labour market. The strike will disrupt the flight schedule of flights between June 11 and 14, Air France says on its website.

"For today, Sunday June 12, we plan to operate around 80% of our long haul flights, around85% of our domestic flights, and around 70% of our medium-haul flight to and from Paris,” the company says.