Originally Posted by
mother-
I book away from the horrible things for any flights over 90 minutes. If I'm not the only one, that will have an impact on the fares they get.
Purely anecdata but from time to time DL works a 739 into the MSP-DEN schedule, and it does
seem to have lower fares on the -900 flight, when I look (and then book away from it). Now, that may be a function of having more of the lowest fare class seats per sortie since the plane has more total seats: +20 in Y vs the MSP-DEN workhorse MD90.