I was looking at The Numbers.com, and apparently some of the BO numbers have been revised, if you go by that, the top 3 pre-2009 ST movies are:
STFC: $150 million
STTMP $139 million
$STIV: $133 million
A STNG movie tops the BO. They also make more than the TOS movies overseas.
If you're looking at http://www.the-numbers.com/movies/series/StarTrek.php#
, those figures don't appear to be adjusted for inflation.
Comparisons of movies at different times is meaningless, if the figures aren't adjusted.