About 40% of flights were canceled Friday at all Paris airports and tens of thousands of passengers were rearranging plans at the height of the summer travel season because of a strike by French air traffic controllers seeking better working conditions.

A second day of strikes by French air traffic controllers have disrupted more flights and caused cancellations at airports in France. About 40 per cent of flights serving the country's capital Paris have been cancelled,

The French civil aviation agency said on Tuesday it had asked airlines to reduce flights at Paris' airports by 25% on July 3 following notification of a strike by air traffic controllers.