Ryanair has cut September and October capacity by 20% owing to "continuing uncertainty" over recent spikes in coronavirus infection in Europe.
The budget carrier said on Monday (17 August) forward bookings had "notably weakened" over the past 10 days after several EU nations re-imposed inbound and outbound travel restrictions.
Spain, France, Sweden and Ireland will bear the brunt of the cuts, although Ryanair has stressed most will be frequency reductions rather than route closures.
It had previously planned to operate at 60% capacity in September, matching August.
Commenting specifically on Ireland, Ryanair said the country’s "uniquely restrictive green list" was barring travel from several countries with lower rates of coronavirus infection than Ireland, such as Germany and the UK.