Hi,

Unfortunately it is limited to the data that the GPS returns. This can vary by airline and flight. But if it doesn't show the class of availability you are looking for I'd suggest trying the Etour tool (which is written with a Japanese interface). You can find the link at http://flyaow.com/class.htm

That tool allows you to specify specific fare buckets and may work for what you are looking for. I just checked YVR to LHR and it does show T&W class at least.

Cheers!