Theo,
I respect and appreciate your attempt at trying to quantify the issue using a real world example but frankly, your methodology and assumptions are simplistic and not a propos to the real world of airline flying. The CASM numbers XJT publishes are based on a world of pure CPA flying - not branded flying. This is true, unfortunatly when you get away from a CPA world your cost go up not down, as now you have all of your revenue related costs that you will pay as opposed to CO paying for them today ie; CRS booking fees, Travel Agent commissions, Credit Card fees etc.
Furthermore, as others have said above, the fare levels change depending on the time of day and how many days out prior to the flight. Also, you ignored the fact that most of XJT's fixed costs will be allocated to the CPA flying that XJT does, which will lower its segmented CASM for the branded flying.
Again true enough, the question is whatever the ultimate fare mix turns out to be, will it produce sufficient revenue. True my methods are simplistic, but when simple indicates such terrible results, than the mgmt better be brilliant to figure out how to make it work. I guess the jury is still out on that one.
As to using bookkeeping tricks to allocate costs to CPA flying as opposed to branded flying. That is simply a way of fooling yourself. Cost is cost, at the end of the day if you want to show it in your CPA flying or branded, it still must be paid . If your revenue isnt there the end result is your gonna lose money.
Lastly, I know the people in charge of this venture incredibly well from the Director of Corporate Strategy/Business Development on up to the CEO himself. They are very pragmatic and thoughtful managers who have been studying this issue for over 3 years. They are well aware of the risks involved in such an operation. Is it a sure thing? Of course not. But no new business venture ever is. I give them credit for trying something new that hasn't been tried before. But I highly doubt that you will see a $120 million loss allocated to 44 jets worth of flying. Time will tell though.
-Neal
PS - I no longer work for XJT...and haven't for the past 12 months.