In Britain, all flights from two Manchester Airport terminals have been cancelled after a “major power cut” which caused huge queues and disruption to baggage processing.
In a social media post on Sunday, the airport said no flights would be departing from terminals one and two “until further notice” following the outage, which hit systems in the early hours of the morning.
It advised passengers due to travel from those terminals not to go to the airport and to contact their airlines for up-to-date information.
Those due to fly from terminal three were told to go to the airport as normal, unless advised otherwise by their airline, after some earlier departures were delayed.
There have been instances where some people’s baggage was not on flights.
Airline easyJet, which operates flights from terminal one, said there were “very long queues” for security and disruption to hold baggage processing, meaning passengers could board flights only with cabin luggage.
It said: “Although outside of our control, we would like to apologise for any inconvenience experienced as a result.
“We are doing all we can and working closely with the airport team to minimise the disruption.”
Meanwhile, a number of arriving flights were being diverted to other airports.
An Etihad Airways flight from Abu Dhabi Zayed International Airport was diverted to Birmingham Airport.
The airport said: “We apologise for any inconvenience and aim to restore normal service as soon as possible.”
A Virgin Atlantic spokesperson said: “Following a site-wide power outage at Manchester Airport, baggage systems are currently not operational.
“Our teams are working closely with the airport authorities and are keeping our customers up to date with the latest information.
“Virgin Atlantic flights are currently departing but may be subject to minor delays.”