Just when you thought things had nearly got back to normal, hundreds of flights were cancelled over the last 24 hours, causing travel misery for thousands, after airlines had to scrap all services to and from the Republic of Ireland and Northern Ireland and Scotland.
The restrictions also prevented flights to and from Tiree, Barra, Benbecula and Islay in the Hebrides, and Campbeltown in Argyll in mainland Scotland.
Budget airlines Ryanair and easyJet were among those forced to cancel flights.
Even the effects on the imminent British Elections are not spared the disruption. Tory leader David Cameron was among those affected, having to delay a campaigning visit to Northern Ireland due to the restrictions.
Flights from continental Europe were not affected by the ash cloud. Neither were transatlantic services which pass over Ireland and Northern Ireland.
The re opening of the airports could prove short-lived, however, with forecasters predicting more ash from the Icelandic volcano will blow down over the country later this week.