Every thing I can think of seeing this name comes out to be commercial value, so the .org does not work well with the terms "Best Flight".
"Flight Reviews" would be the best option to build on it and the revenue would be affiliate commission / advertising.
BestFlight.com is not yet developed but they do have a page up stating Flight deals.
BestFlight.net, BestFlight.in, BestFlight.com.au (Just randomly looked these up) are not developed as well.
The domain name, not much. If you develop it then maybe you can even sell it to one of the domain owners of bestFlight.[extension]
I think it is a good name. It can be converted to a blog by someone about flights as @Dineshkp suggested I agree with him if you will have .com extension the things will be different. But I think still their will be people who will buy this domain easily because it atleast a meaning full domain.
It can be a blog about best flight a person had who travels a lot who knows ? Maybe someone write a whole blog about reviewing flights. About their services about their prices maybe.