Have you ever been vacuum-packed into a shrunken coach seat wishing the airline CEO had to endure the same discomfort?

We did that for you, sort of. The Middle Seat asked the chief executives of the big three U.S. airlines to plop down in the back of one of their airplanes and explain why they think the skimpy confines of coach today are acceptable.

Two agreed. Delta CEO Ed Bastian, 6-foot-3, arranged for an interview on his company’s most recently reconfigured Boeing 777-200 in Atlanta. American CEO Doug Parker, also 6-foot-3, snuggled into a coach seat on a reconfigured 777-200 in a Dallas-Fort Worth airport hangar.

One refused: United’s Oscar Munoz declined to be interviewed in a coach seat. Asked why, United declined to comment.

Messrs. Bastian and Parker fit, although knees were kissing distance from the seat in front. Neither had to contend with a middle-seat neighbor to rub shoulders and sides or a passenger reclining in front of them.