Originally Posted by
avidflyer
Unlike most businesses, Airlines cannot add back capacity one seat at a time. It is 100+ or nothing (on longer routes) and that is when they need the FF'ers to fill those airplanes, particularly on business travel days.
Literally one seat at a time, no, not very often, but the Delta fleet fragmentation (for the great majority of routes/flights) makes the increments a heck of a lot smaller than 100 seats. A few selected seat capacities from delta.com:
DC-9-50, 120
737-700, 124
A319, 126
MD-88, 149
A320, 150
737-800 & MD-90, 160
767-300ER (76T), 208
A330-200, 239
767-400ER, 246
777-200ER/LR, 269
A330-300, 298