Since early April the number of flights taking place around the world has dropped 80%, but the moment travel bans are lifted prices could skyrocket.
Figures out today from the International Air Transport Association show air traffic is down 80% in early April, with more than two million flights now cancelled.
Worse, figures from Heathrow show passenger demand is down by more than 90%, with most of the flights taking place there full of cargo, not people.
But while passenger flights are grounded, demand is building up as people look to reschedule holidays for later in the year.
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