USEast1

I have been reading some of the upgrade threads trying to figure out this little game that you seem to have to play.

Anyway, is is true that flights holdd 25% of their F seats until day of departure to be released at the airport.

Therefore, would a 757 have 2/8 F seats held until departure all the time?

Now, also, if the availability on ExpertFlyer is indeed showing F0, does that truly mean at this time, there are none left, or have they just been released to the airport?

thanks