see which PAX class(es) airlines offer

Is there a way to easily see, which passenger class(es) an airline offers?

I’m also flying with 1st and prefer IL’s with similiar airlines.

As far as I know you can only find this out by opening individual flight details for your competitor’s flights.

edit: Oh, and through the fleet list, you can see the configuration (F/C/Y).

And in addition: when you look at the fleet list and count the seats you can make a guess which seats your competitor uses (its quite easy when he uses the same Aircraft types in a 2 class config, gets way more complicated in a 3 class setup)