Are airline pilots allowed as many 10% tickets for their children as they like, and if so, at what stage in their career does this start?

as said, most airlines have a benefits package for all fulltime, company paid employees, which would include some type of discount travel for themselves and possibly their family members. This could be parent's, spouses, siblings and children. Most, I'm assuming, are stand by or Non-revenue, which would mean that you only fly if there is a seat on the airplane. These days, some airlines even allow for "non-rev" tickets for anyone, but with in a certain amount (like 10 per year.. and that 10 would also include family).

in the 1970's, who knows.. might have been a lot more available, or stricter..

For british airways certainly,two kids can fly 100% free just needed to pay the taxes.

All airline employees receive some type of discount for family (and friends) and either fly 100% free or pay the fees and taxes and surcharges.

I flew this way for 10 years--standby on most occasions however.

That all depends airline to airline, if you let me know the name i might able to give you full detail accordingly

They are entitled for all the benefits after the probation period, for your info not just pilots all the airline employees are entitled for rebated tickets for thier immediate family and in some big airlines e.g american airlines, all middle eastern airlines parents too.

depends on the airline

This can take place at a time in the pilot's career only after the pilot has actually had children.

I hope this clears things up. ;-)