Originally Posted by verve
J on LX is the cheapest Biz fare bucket, whereas C on LH and on LX is the booking class for full fare Biz. This could easily explain the 500€ difference.
I am fully aware of that. The surprise is that Lufthansa.com offers the J fare bucket and LX flight numbers not to customers logged in into their account. I only got these fares offered after I logged out....