MILAN — Italy’s struggling airline Alitalia has cancelled over 300 flights because of a 24-hour strike called to protest deteriorating conditions in the sector, including the government’s failure to relaunch the carrier.

Alitalia says it cancelled about half of its flights, both domestic and international, due to the strike Tuesday.

But it says it has reorganized schedules so that at least half of the affected passengers could fly the same day. Flights are guaranteed by law from 7 a.m. to 10 a.m. local and from 6 p.m. to 9 p.m.

The country’s main transport union called the 24-hour strike to push for a deal that will guarantee the future of Alitalia, but also more generally for the renewal of a national contract and other measures to support workers.