Hi Hols,
If you give our Holiday Advisors a call, they should be able to tell you what airline will be used dependant on what cruise you're interested in. We generally use standard airlines, like BA, and have not had an complaints about our charter airlines either.
The ages can range anything from the 40's up to 85+. Of course, the older people usually cruise with us around Europe and the travellers get slightly younger the further away we cruise.
I hope this helps.
Kindest regards,
Monty