[pabianice]

Because even the captain has no power over physics. You can’t have four passengers stand for the length of the flight.

[beelzepug]

“You can’t have four passengers stand for the length of the flight.”

Why not? I’ve stood nearly that long in the security check line.

[fortes fortuna juvat]

You can’t have four passengers stand for the length of the flight.
++++++++++++++++++++++++++++++++++++++++++++++++
And I feel sure that FAA regulations prohibit standing passengers, i.e., passengers with no assigned seat.