The three airports most at risk of gridlock when EU entry-exit system begins
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Aviation economist Oliver Ranson warns that the EU's new entry-exit system (EES), starting 12 October, could cause significant disruption at European airports.
The EES requires non-Schengen travellers, including Britons, to provide biometrics, potentially quadrupling processing times at border checkpoints.
Athens, Bucharest, and Milan Malpensa were identified as the three European airports most at risk of passenger gridlock due to their evenly spread non-Schengen arrival patterns.
Mr Ranson suggests that if queues do not dissipate, flights could be diverted or cancelled, impacting both arriving and departing passengers.
Airports with clustered or wave-like non-Schengen arrivals, such as Palermo, are considered less vulnerable.