night coach

the class of airline coach at a lower fare than regularly offered, often restricted to late-night journeys.

Compare day coach(def 2).

Origin of night coach

First recorded in 1835–45; night + coach

This he would not hear of, as the night-coach was on the point of starting.

Recollections of a Policeman |William Russell (aka Thomas Waters)
At eight o'clock the father and child were seated in the night-coach, with one other passenger,—a man muffled up to the chin.

My Novel, Complete |Edward Bulwer-Lytton
The night-coach by which Susan was to go, was on the point of departure.

Dombey and Son |Charles Dickens
You had better come with me by the night-coach, if you would see the last of him, young man.'

Evan Harrington, Complete |George Meredith

He has informed Mrs. Wakefield that he is to take the night-coach into the country.

Twice Told Tales |Nathaniel Hawthorne