Originally Posted by winelover
I was looking at the "availability" of a flight and it says the following.
R1 X1 N4
Does this mean there are 6 seats left? What do the different codes mean?
It looks like you're looking at award availability, and not revenue ticket availbility. R1 means there's one (1) First Class award seat (XF) available. X1 means there one (1) First Class upgrade (NF) available. N4 means there are four (4) Economy Class award seats (XY) available.
This thread (linked from the FAQ) shuold answer all your other questions.