"The Irish Aviation Authority (IAA) directs Irish airline operators not to operate to/from Sharm el-Sheikh Airport, Egypt or in the Egyptian Sinai Peninsula airspace until further notice," said IAA chief executive Eamonn Brennan in a statement.
"An update will issue once further information becomes available."
Russian airline blames 'external' factors after IS releases 'video proof' they shot down aircraft in Egypt
The authority took the "precautionary measure" following an announcement by Britain that new information indicated that the Russian plane could have been brought down by a bomb, the IAA said.
Britain temporarily suspended flights on Wednesday from Sharm el-Sheikh, from where the Airbus A-321 took off before crashing and killing all 224 people on board on Saturday.
Russian plane crashes in Egypt, killing all 224 onboard
Officials from Ireland's Air Accident Investigation Unit are taking part in the investigation into the causes of the crash, as the aircraft was registered in Ireland through a leasing company.
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