Further travel misery is threatened with French unions calling for more protests and strikes across the country over two days next week.
Industrial action by French air traffic controllers as part of wider workers’ unrest forced at least 200 flights to be cancelled between Monday night and Wednesday morning.
Ryanair and aviation industry body Airlines for Europe (A4E) both lodged protests against the disruption and called on the French government and European Commission to step in.
However, the Foreign and Commonwealth Office warned of disruption and delays to transport services in France on September 21 and 23 due to further walk-outs.
Workers across France have been protesting against planned labour law reforms.
The FCO said in an updated travel advisory: “On 21 and 23 September French unions have called for protests and strike action across France.
“This could cause disruption and delays to transport services including rail networks and some maritime ports.
“You should allow extra time for your journey and check your chosen operator’s website before you set off.”