A redeye is an overnight airplane flight. If you're traveling to New York from Los Angeles, you could take a redeye that leaves at ten p.m. and arrives around seven a.m.

Because they're crossing time zones and will lose several hours, travelers heading east sometimes choose to take a redeye. Theoretically, you can sleep on the plane during a redeye and be wide awake when you reach your destination. In reality, though, they're called redeyes for a reason: the red-rimmed eyes you have after an uncomfortable, sleepless night.

Definitions of redeye

n a night flight from which the passengers emerge with eyes red from lack of sleep

“he took the redeye in order to get home the next morning”
redeye flight
Type of:
a scheduled trip by plane between designated airports

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