He is referring to passengers flying coach.
coach (kch)
n.
1.
a. A motorbus.
b. A railroad passenger car.
c. A closed automobile, usually with two doors.
d. A large, closed, four-wheeled carriage with an elevated exterior seat for the driver; a stagecoach.
2. An economical class of passenger accommodations on a commercial airplane or a train, also known as cattle class.
3. Sports A person who trains or directs athletes or athletic teams.
4.
a. A person who gives instruction, as in singing or acting.
b. A private tutor employed to prepare a student for an examination.
tr. & intr.v. coached, coach·ing, coach·es
1. To train or tutor or to act as a trainer or tutor.
2. To transport by or ride in a coach. or cattle