The US and UK are banning laptops from cabin baggage on flights from certain countries in the Middle East and North Africa, as well as Turkey.
The US ban on electronic devices larger than a smartphone is being imposed as an anti-terrorist precaution.
It covers inbound flights on nine airlines operating out of 10 airports. Phones are not affected.
The British ban, announced hours after the American measure, is similar but applies to different airlines.
Downing Street said airline passengers on 14 carriers would not be able to carry laptops in cabin luggage on inbound direct flights from Turkey, Lebanon, Jordan, Egypt, Tunisia and Saudi Arabia.
The Turkish government said the US ban was wrong and should be reversed.
Large electronic devices will still be allowed on board in checked baggage.
Canadian Transport Minister Marc Garneau said his country was also considering restrictions on electronics in the cabins of planes.
British Airways and EasyJet are among the airlines affected by the UK ban.
The nine airlines affected by the US ban are Royal Jordanian, EgyptAir, Turkish Airlines, Saudi Arabian Airlines, Kuwait Airways, Royal Air Maroc, Qatar Airways, Emirates and Etihad Airways.
The airlines included in the US decision have been given a deadline of 07:00 GMT on Saturday to impose the ban, officials said, adding that the restriction had no end date.
However, an Emirates spokeswoman told Reuters news agency the airline understood that the US directive would come into effect on 25 March and remain valid until 14 October 2017.
The restriction is based, we are told, on “evaluated intelligence”, BBC security correspondent Frank Gardner writes.
That means that US intelligence has either intercepted discussion of a possible extremist plot or has been passed word of one by a human informant.
Meanwhile, the Washington Post providing an alternative explanation said that more than a security concern this could be a ploy to discourage business travelers from using Gulf airlines and opt for US carriers instead.
The Washington Post wrote: “Three of the airlines that have been targeted for these measures — Emirates, Etihad Airways and Qatar Airways — have long been accused by their U.S.
competitors of receiving massive effective subsidies from their governments. These airlines have been quietly worried for months that President Trump was going to retaliate. This may be the retaliation. These three airlines, as well as the other airlines targeted in the order, are likely to lose a major amount of business from their most lucrative customers — people who travel in business class and first class. Business travelers are disproportionately likely to want to work on the plane — the reason they are prepared to pay business-class or first-class fares is because it allows them to work in comfort. These travelers are unlikely to appreciate having to do all their work on smartphones, or not being able to work at all.”