It looks quite open looking at Flightstats. (
http://www.flightstats.com/go/Flight...ideCodeshares=)
TIP:
Note that it is possible to check loadings yourself (for free)!
There is a complimentary/free service/facility available using "
FLIGHTSTATS". You will need to register¹.
The URL is here:
Flight Availability By Route. "Mouse-over" the Flight Stats (First/Business/Economy) numbers to get fare bucket availability.
See this thread for hints on how to read loadings:
¹
This can be done using your
or
credentials.