All British tourists stranded in the Egyptian resort of Sharm El Sheikh are expected to be home by Tuesday.
The UK government says airlines are laying on flights with extra security measures.
It is because of concerns that a Russian passenger plane was brought down by a bomb almost two weeks ago.
Anyone staying beyond Tuesday is advised that airlines may not be subject to the stricter checks.
Meanwhile, the Department of Foreign Affairs here continues to advise Irish people to avoid non-essential travel to Egypt, though they make exceptions for The Red Sea coastal resorts including Sharm El Sheikh and for the Luxor, Aswan and Abu Simbel sites the location of ancient historical sites.
Authorities say there is a heightened threat of terrorist incidents, including attacks against foreigners and a continuing threat of civil unrest.
The DFA says "Although there are additional security measures in place to protect the country’s major tourist resorts and sites there is a risk that tourist areas and other places frequented by foreigners may be specifically targeted by terrorists planning future attacks."
A spokesperson for the British government said they had been working with UK airlines to get as many British people as possible out while the current security measures are in place.
Downing Street said that after Tuesday: "British airlines estimate that after this date, there will be fewer than 200 of their passengers remaining in the resort."
"Should tourists choose to remain in Sharm el-Sheikh after Tuesday 17 November 2015, they should make their own alternative arrangements for returning to the UK."
Irish people who do decide to travel to Egypt are still being advised to let the Department of Foreign Affairs know their travel arrangements.