Air controllers in France walked out on Monday, causing flights to be canceled across the country, local media reported.
Workers are protesting the adoption of a draft law to regulate the services during social movements and strikes, the daily Le Figaro said.
The French Directorate General for Civil Aviation had previously warned passengers of flight cancelations, noting that the strike would affect airports of Paris-Orly (25%), Toulouse-Blagnac (25%), Bordeaux-Merignac and Marseille-Provence (20%).
Flights are at risk of being canceled or delayed until Tuesday at 6.00 a.m. local time (0500GMT), the directorate said.
Parliament adopted the draft law last Wednesday despite left-wing opposition that sees the legislation as a threat to the right to walk out.
According to the draft law, all air workers whose absence would directly affect the realization of flights must individually declare their participation in a strike two days prior.
