sounds about right, from jfk in the fall/winter, PE
runs about $700-900, and in the summer months can get to $1100-1600 which is kind of low I think, because there are so many competitors on the run.
but as of late BA
has had a promo to upgrade your coach ticket for $250 each way to PE
, but that was only for US Destinations, so I am not sure if the offer is valid from Mexico, but it would be on ba.com under offers.