easyjet is one of many airlines set to cancel flights over a strike by french air traffic controllers and new border control checks threaten severe delays .
air passengers face up to three days of disruption , with british airways , easyjet , ryanair and flybe among the airlines forced to cancel dozens of flights .
change , which takes effect from today , means every passenger in a car or coach will have their passport scanned .
and those travelling abroad by ferry or eurotunnel face queues as exit checks are introduced at britain 's ports .