MIA-ISP! I don't know if it is a possibility or not, but Miami-New York is the heaviest traveled corridor in the United States over 750 miles, and of all the possible airport combinations, MIA-ISP is the only one that does not exist. I see no reason why AA cannot make a daily 737-800 work. I know Islip is not the highest yielding airport, but Miami-Islip is big enought a market, IMO. Huge O&D numbers, and right now the only choices are weak: DLX to FLL or WN to FLL/PBI. It would be "streching" the limits, but an ERJ can do MIA-ISP.