Overview
- Manchester Airport recorded 12 cancellations in the morning and a further six in the evening on December 9, with many affected services operated by Aer Lingus.
- Published figures for Dublin Airport conflicted, with one report citing 42 cancellations and another reporting 91 cancellations plus around 10 diversions.
- Belfast City was the worst‑affected UK airport, with 27 cancellations reported and a British Airways flight from Heathrow returning to its origin after an aborted approach.
- The Met Office and Met Éireann kept amber and yellow warnings for wind and rain in place, with disruption extending into Wednesday across Scotland, Northern Ireland, Wales and parts of England.
- Travel impacts stretched beyond aviation as Irish Sea ferry crossings were canceled, rail services were curtailed on key routes, and regional roads in Greater Manchester saw flooding and a multi‑vehicle crash on the M66; one report suggested an unconfirmed staffing issue at Manchester.