There is disruption to flights in and out of France today because of a strike by air traffic controllers there.
Ryanair has cancelled 26 flights to and from France, while Aer Lingus has cancelled a return flight between Dublin and Paris.
Both airlines have warned that other flights through French airspace may also be affected.
Intending passengers are advised to check the website of their airline before travelling to airports.
The strike was called by key unions against President Francois Hollande's proposal to cut business taxes to try and create jobs.
The country's DGAC civil aviation authority said airlines were reducing their flights into and out of Paris airports by 30% and those to and from the cities of Lyon, Marseille, Nice and Toulouse by 20%.
Four unions are protesting against Mr Hollande's "Responsibility Pact", which seeks to implement €30bn in cuts to payroll taxes and €50bn in spending cuts over three years to kickstart growth and revitalise the eurozone's second economy.