Originally Posted by
Yhztraveller
Ok, for the newbie, what is EF?
Hi. Welcome to Flyertalk.
EF = Expert Flyer. Its a website that offers information that is very useful to frequent flyers. Its off things like the number of seats available for purchase for every fare bucket, upgrade/redemption space (for certain airlines) seat alerts and a whole bunch of other things.
Very useful, and just nerdy-cool if you're a plane geek like me!