Travel chaos as major radar glitch results in delays for many flights
Irish airspace was partly closed for almost two hours last night due to a significant problem with the main radar system.
Flights at Cork, Shannon and Knock airports were all suspended due to a technology glitch just after 9pm.
However, a spokesperson for the Irish Aviation Authority (IAA) said that flights began again before 11pm - but warned some delays were still expected.
Last night the airports were relying on a back-up radar system which allowed flights to take off and land.
A spokesperson said: "Safety is the IAA's main priority and, in accordance with normal procedure, the IAA restricted air traffic while the issue was being investigated.
"Flights to and from Shannon and Cork were affected by the restriction. Dublin was not affected. As part of planned contingency, the IAA moved to its back-up systems and the flight restrictions have [since] been lifted.
"Traffic flows are now in the process of being restored to normal capacity. An investigation into the technical issue is ongoing. Intending passengers should check with their airlines."
Several transatlantic flights were rerouted to avoid Irish airspace as a result.
Dublin Airport was unaffected due to its proximity to British air traffic control.
Some flights bound for Shannon and Cork were rerouted to the capital and passengers were then bussed from Dublin Airport.
A Cork Airport spokesperson said there was a significant systems failure with radar in the west of Ireland resulting in "zero flow rate" in Irish airspace.
Most flights were expected to operate to schedule this morning but passengers were being urged to check the status of their flights with their airlines.