Ryanair and Aer Lingus today cancelled a number of flights to and from France due to a general strike.
Aer Lingus cancelled two flights between Dublin and Paris.
Ryanair cancelled 21 flights between France and Dublin, Shannon and the City of Derry Airports. Intending passengers are advised to check their airline's website.
Disruption and delays are also expected to some Irish flights that use its airspace.
French unions went ahead with another day of strike action against plans to raise the retirement age, even though the measures have now been approved by parliament.
Flights in and out of French airports have been reduced by 30% to 50% due to a one-day stoppage by air traffic controllers, and a rolling strike by rail workers halved some services but caused less disruption than previously to high-speed links.
President Nicolas Sarkozy refused to back down when unions mounted strikes and nationwide street rallies in the past two months over his presidency's flagship reform.
Today marked the seventh day of protests called by the unions over the plans to raise the retirement age from 60 to 62, all but one of them since the start of September
Jean-Claude Mailly, head of the Force Ouvriere union, said the pension bill had yet to be signed onto the statute book but acknowledged that the protest movement was losing some of its previous punch.
'This will leave deep scars,' he said on France 2 TV, while acknowledging that the protest movement was starting to show 'a little fatigue'.
More marches were programmed, including one in Paris in the afternoon.
A separate month-old strike at the port of Fos-Lavera near the southern city of Marseille may now become the government's main focus.
It is starving many French refineries of crude oil even after workers at several of them voted to resume work after weeks of work stoppage.
Mr Sarkozy says the legislation to raise the minimum and full retirement ages by two years to 62 and 67 is vital to rein in a ballooning pension shortfall and safeguard the AAA credit rating that lets France service its debt at the lowest market rates.
The bill got the final vote of approval in parliament yesterday.
It still needs to be approved by the constitutional council where a last-minute challenge by the opposition Socialists could mean a delay of a few days but is not expected to overturn it.
