Multiple factors prevent the airline industry from healing, and the current situation shows no indication of fast recovery.

Throwback to nine defunct carriers whose unique aircraft colors have disappeared from Europe’s runways and why they went the way of the dodo bird.

"As we're on the runway going super-fast, as you normally are for takeoff, that's when it went super loud. Boom," Christine Buff, a passenger on Flight 2301 to Denver, said.