I just hope that they use the 767, instead of the 737 or 757, for the JFK-STI route. I've always considered the dual aisle seating configuration much better.

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It might be better for you but certainly not better for the airlines. The A300's and 767's burn tons of fuel and even when the plane is full with the cost of oil they just cant afford to fly big planes like this to the Caribbean anymore. Airlines like AA want to save the twin aisle jumbo's for routes that are much more lucrative and have a higher yield per ASM (available seat mile). For example JFK-LAX where there is a much higher number of business class passengers and a much higher percentage of passengers paying the full coach fare. Then the revenue the flight justifies the huge aircraft and the fuel it burns. Flights to the Caribbean are generally low yield flights by airline standards with the bulk of passengers paying discount coach or deep discount coach fares so even an A300 completely full will be losing money at today's fuel prices. They have a much better chance of making money on a 757 flight from JFK-SDQ full with 188 passengers than a 767 full with 225 passengers. When the A300's are retired by the end of 2009 that will leave AA with 777's and 767's for widebody aircraft and because of the gas these planes guzzle they will want to use them only on high yield routes and flights to the DR are definately not that.