I've never used it but I'm considering it for future flights..Do i have to go to each airline and download it or is there one general website that you can just download DING from and it gives you all the flights leaving from your city?? or do only certain airlines participate with Ding? I'm thinking of going back to Florida in Jan or Feb, considering a move there, so my son and I would fly and meet up with friends down there..looking for the best deal..any help would be appreciated..thanks