Ch. 12 said:
Through contracts, MESA/MDA can "guarantee" themselves a profit but U does not set out to "guarantee" a profit to them. And when you say "guarantee", that means that if operating costs such as fuel remain constant, they can profit, but there are no guarantees as we all see these days.
And the issue is that U pays MESA/MDA an amount that covers the operation of these flights, but if U were to take on the flights themselves, it would cost much, much more. By contracting to these other carriers, U's CASM is actually LOWER than it would be if they tried tackling the smaller markets themselves.
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MDA is really only an internal thing, not really an airline at all. Its just a division of US Airways itself (the actual company), like MetroJet, US Airways Shuttle, or the seperate international crewing- (basically... none of those are a completely valid comparison, but its really only a group at US operating a specific airplane, under different contracts, on a fenced seniority list) So MDA is not even an entity that makes profits or losses for itself, its simply a name for an operating division of US Airways.
Piedmont and PSA are wholly-owned subsidiaries of the US Airways Group. They are thier own companies (unlike MDA) within the US Airways Group corporate structure, so the money stays "at home" so to speak.
Mesa, Trans States, and Chautauqua are contract RJ companies. They are completely different companies that are basically "franchising" to put it nicely, or outsourcing and whipsawing the actual US/USX employees if you were being honest. The agreements vary, but I believe Mesa (and I'd imagine the others) are guaranteed a profit. I'm not quite sure if its still a fee-per-departure agreement.
Air Midwest, Colgan Air, Trans States turboprop operations, and Shuttle America are contracted turboprop operators. As I understand it, they are free to set thier own schedules as such and thier income depends on how profitable the flights they operate are. Affiliate turboprops operate under a more traditional codeshare type of set-up.
Labor costs are lower at all of the Express than they are at mainline, so whether they use thier own internal cheaper labor or outsource to an outfit with low costs they are saving money by using Express carriers. But from the little I know about CASM etc, the fewer seats you have, the higher your CASM is. I also dont believe Express carriers are figured into US's CASM, with the exception maybe of MDA.