Originally Posted by gloopy

Semi-related note but does anyone have handy the DC9 and MD90 operating costs?

I'm just wondering if an MD90 put on a DC9 route, segment by segment (not CASM) is the same cost or cheaper. IOW, even though the 90 has 30ish more seats than the 9, if the total cost to fly the same segment was the same or less on the 90, that would be added capacity (on a 1 for 1 basis) that wouldn't saturate the bottom line as we could always cap the fare buckets to match the 9 and only sell the extra seats in the 90 at the highest bucket only during peak times and/or irop relief.