Narrator: We went on board Delta's redesigned Boeing 777 with the people whose job it is to make flying suck a little less. Delta announced the redesign of its entire 777 fleet back in 2018.

American, Delta, and United's average fleet ages are similar, and all of these carriers have a mix of aging and modern aircraft.

A Delta Air Lines flight was evacuated Monday after one of its engines caught fire prior to departure at Orlando ...