Red-Eye and Very Early Business Flights: Getting Some Rest on the Way

https://milwaukeeflylimotravel.dovetailscope.com/posts/planning-a-milwaukee-evening-when-the-finish-time-is-uncertain-with-belongings-shared-by-colleagues

Red-eye flights and very early departures are common for business travelers heading out of the Chicago airports. For an early departure, note how long the traveler needs at the airport before the flight