Ryanair CEO Michael O'Leary has criticised the English quarantine system for travellers, also blasting quarantines in general as "unenforceable".
He also noted that the Irish company expects the load factor on its flights in November to be in the mid-60% range.
All those arriving in Britain must undergo 14-day self-isolation (5 days if they have a negative coronavirus test), except for a "travel corridor" list that includes Ireland. However, according to media reports, the restrictions will end by Christmas so that Britons can travel to high-risk countries to visit their relatives.
In June, the businessman had commented on the situation in the UK, saying that the quarantine system "is going to do untold damage to British tourism", adding that it will also prove "useless and ineffective".
While Ireland has confirmed over 70,00 COVID-19 cases and 2,000 deaths so far, the coronavirus tally in the UK is 1.5 million. Britain also has the highest death toll in western Europe and fifth-highest in the world, as over 55,000 people have succumbed to the virus, with England being the main centre of the outbreak.