Originally Posted by DeltaFlyingProf
Exceptions exist for CO operated flights.
This is the CO fare class list for DL MQM's
Cabin Fare Class MQM Formula
First or Business A, C, J, Z, D 500 x 1.5
Coach/Economy Y, H 500 x 1.5
Coach (discounted) K, N, B, V, U, O 500 x 1
Coach deep-discount Q, I, S, W, T, X, L 500 x 0.5