On-line booking Z Fare

Am I doing something wrong as I do not seem to be able to find out the price of a Z fare on-line (or does that mean there are no Z fares left for next July!). I have tried putting in "lowest upper" and it comes up with J going and D return. I just wanted to price up the difference between buying 2xZ and using my companion voucher.

[mitchja]

Indeed, if the VS web site is only bringing up J or D fares when you select 'Upper Class (lowest)', it means there's no availability in Z for that flight.

Try using the lowest fare finder which should bring up the table offering alternative dates. Put a check next to the 'lowest fares +/- 3 days' option before you start the flight search.

Regards

I doubt z class seat only fares have been released this far in advance.

That would make sense then as I searched for quite a few July dates. I'll leave it a few weeks and try again. Thanks for all your replies.