Companion Tickets - which ticket Classes

Hi,

Having had a look, the fares with which you can use a companion voucher are called "full" fares.

So, for a companion UC ticket can I only do so when flying on a J?

Thanks in advance
Nick

Yes.There would also need to be a G available for your companion to utilise for a seat in UC.IMHO bit of a no brainer (unless sombody else is paying for the J) as 2xZs or even 2xDs (or a mix of both) will probably be cheaper than 1xJ and both earn miles and points (unlike the J and companion which will only earn on the J).