red-eye flight

米アリゾナ州フェニックスからマサチューセッツ州ボストンに向かっていたアメリカン航空で機長が飛行中に急死し、副操縦士が無事に同機を緊急着陸させるという出来事がありました。

American Airlines pilot dies on Boston-bound flight
Plane diverted to Syracuse after pilot's death

BOSTON —An American Airlines pilot on a flight from Phoenix to Boston died as the plane was en route Monday, the airline said.

The red-eye flight left Phoenix just after midnight and was diverted to Syracuse after the pilot's death.
"Syracuse, American 550,  medical emergency, captain is incapacitated, request handling for runway," a transcript of the co-pilot's radio transmission said.

red-eye flightは，「赤目から」推測できるように，乗客が睡眠不足から目が真っ赤になるところから深夜の夜間便のことを指します。Cambridge Business English Dictionaryには，"a plane journey during the night, usually one that is over a long distance"とあります。（Inaho）