I assume in chartering one you would need to accept payment for individual seats by credit and debit card - so you would need to either use a card payment company or cover the entire risk by pledging up your money up front. So a 737 has around 190 seats, say average one way cost £150, we would have to offer up £28,500 to cover the risk of everyone paying £150 all by credit card - and then stand to make only £28,500 less the cost of the charter.
Should the plane fly half full, we're finished! If the plane flies full, we are heavily overdrawn till we get our £28,500 surety back. Not the most attractive business to enter eh
