Only they are replacing DC-9 flying with rj's. While Delta replaced 737's with rj's. I find it ironic that the "new Delta" will slowly be slimlining its DCI portfolio. Wonder which carrier(s) will get the cut?
With respect to the RJ's. These numbers are a bit skewed as NWA feeders are building up to 72 76 seat aircraft. 35 Avros were pulled out of service which pulled the feeder numbers way down in 07. Now they are being replaced with the new 76 seaters which is driving the year-over-year numbers back up. This is a one time year-over-year bump as 2007 was a one-time year over year decrease. You'll see a net increase of 37 76 aircraft over historical NWA numbers when it's all said and done.
I just bought my dad a r/t on United from Tampa to Buffalo, NY leaving only 3 days from now and returning next week. Grand total $220 w/taxes and the whole deal. Given that or a payroll deduct of a hundred bucks and change so he can standby all day non-revving on NWA the choice was easy.