Okay, this is a bit involved, so please bare with me...
For a while now, a friend of mine and I have been seriously considering starting an airline. We aren't rightly sure how to do this, but this is the general basis for the services provided (because we have yet to name it, I will simply use the name Air Lines):
The company, Air Lines, would consist of three separate yet connected air service providers. Air Lines itself would be a low-fare passenger carrier operating flights on a global scale precisely the same way as Southwest or Ryanair do on a local/national scale. Using the three variants of the 767, we would fly only to the world's largest 25 or 30 cities. Rather than have centralized hubs with "explosions" of routes outwards, the network would connect all major cities to all major cities. The all-economy airplanes would feature slightly greater seating pitch than is standard on Y classes. This, combined with 2-3-2 seating, will make the planes highly efficient. As with Southwest, we will operate one type and one type alone. The network will be the only airline in the world to offer service to every major city. No "Iberia from Madrid to wherever; AirFrance from Paris to whereever; United from Denver/Chicago to wherever;" it would be a system leaving out the little cities, only flying to the most populated parts of the planet Earth, and having a low-hub well-spread flight system. As time passed, the increase of routes would not feature added cities, but added connections. Assuming we had 30 cities, it would be impossible to fly from each of the 30 to each of the other 30 right off the bat, so as the years passed, routes would be added connecting the cities not first connected, always maintaining the original 30. The idea would be to eventually form the single most solid network of major-city connections around the world. We would offer our planes to just about any company on Earth for use as Logojets given that with planes which would go around the world regularly the advertising prospects would be high.
The second division of the company would be AirLines Aircraft Leasing. Rather than be just a leasing company like ILFC (there is, for example, no ILFC Airlines), we would combine the profits of a regular airline with those of a leasing company, allowing us to transfer earnings from the airline into the leasing company, thereby allowing us to lease aircraft at a lower rate, drawing in lots of business and in turn generating additional profit with which to buy new aircraft to be alternately supplied to the airline and the leasing company.
The third division would be a new kind of cargo carrier which would team up with individual companies. Rather than calling FedEx, UPS, or Cargolux to have something shipped from point A to point B, companies would inform us of their most regular routes and we would lease them an airplane at a rate allowing them to run the plane regularly back and forth (using our pilots). By teaming up like this, the question would never be about where the planes have to go or if they'll be used. If Microsoft had to ship computer chips from Seattle to Spokane regularly, rather than pay for dozens of individual shipments, we would simply let them have the plane. They would make regular payments for as long as they used it. The payments would be low, but would very quickly surpass the price of an ordinary shipment.
The three companies would operate together, such that if one came into dire need of cash while another was in sufficient cashflow, money would be drawn through a single central account, (Airlines Company, etc.).
The airline would be the first low-fare world-wide carrier, doing exactly what airlines like Southwest do, but on a global scale, and the first to both own and operate aircraft, and lease them, and the first to provide companies with regular shipping needs a low-cost alternative to using outside shippers.