Speaking on the BBC’s Andrew Marr Show, foreign secretary Philip Hammond said security may need to be boosted in areas where Islamic State is known to be operating.
But he admitted security everywhere could be further reviewed with experts predicting this could lead to further restrictions on what passengers can carry in their hand luggage and further checks.
Hammond said: “If this turns out to be a device planted by an (Isis) operative or somebody inspired by it, then clearly we will have to look again at the level of security we expect to see in airports in areas where (Isis) is active.
“What we have got to do is ensure that airport security everywhere is at the level of the best and that airport security reflects the local conditions and where there is a higher local threat level that will mean higher levels of security are required.
“That may mean additional costs. It may mean additional delay at airports as people check in.”
Hammond’s comments came as the Egyptian authorities said they were “90% certain” that the aircraft was brought down by a bomb at the end of October, killing all 224 people on board.
Meanwhile a total of 5,298 British tourists were flown home over the weekend as up to eight UK-bound aircraft were allowed to depart the airline on Sunday.
However, about 3,000 Brits are believed to be log jammed in resort with many who made their own arrangements for the trip going to the airport each day in the hope of getting on a flight.
Tour operators are also making contingency plans as a UK government ban on British holidaymakers arriving in the resort remains in place.
Up to 20,000 Brits were thought to be in resort when the attack took place.
