Looking ahead at December schedules for Phoenix, I've noticed several airlines have not replaced capacity the way they normally do in the fall. Some observations:
Delta - Only one 767 on the schedule (ATL) - understandable due to
reduction of 762s from the fleet, but no increase in the number of
Northwest - Only one 757-300 (MSP-PHX-DTW), but no resumption of 2x
daily to MEM, and decrease in the number of usual flights to
MSP (I remember winters past with 9-10x daily and multi 753s)
Continental - No 757s to IAH, CLE down to one daily 738.
United - A320s to everywhere, boring, but not a change in the recent past
for them. Gone are the days of 757s/767s and DC10s.
Air Canada - No aircraft upgrade (to A321 or 767)
Alaska - no 739's or increase in number of flights
US Airways - even with the merger, no increase in hub-hub capacity (all 320
The only carrier that seems to be carrying on business as usuall is AA with 11x daily to DFW (mostly 757s) and 6x ORD.