This is my first post, so please bear with me.
I have booked a bus class flight with SQ from SYD to FRA in June '09 using Virgin Atlantic points. At the time of booking, I was not sure whether I was going directly to Berlin, London or New York from FRA; it pans out that I need to go to London first.
As the ticket is issued and the seat allocated, I have been told by a couple of travel agents that even if I book a flight from FRA to LHR with a partner airline (it appears LH is one) on the same day with only a transit in FRA, it will be a separate ticket and therefore highly unlikely that my baggage can be checked through. They also implied that this would be up to the check-in staff.
It won't be using points and I will probably book on-line, although I would use an agent if I thought it would help. It will be an econ ticket.

Thanks for your help and sorry about the long-winded post.
Pierreg

It depends on how helpful the agent is that day. Since those airlines inter-line, it is possible. It would have been more likely to happen if at least you were connecting within one alliance.

Booking on-line or phone will not be the determining factor.....and you could not do it if OLCI. You'll have to find a friendly and helpful agent and actually stand in line to check in at SYD.

Thanks for the help. I am pretty much resigned to the fact that this is unlikely. I will just have to try my luck at the time.

Welcome to FlyerTalk!!

Make sure that you have your FRA-LON flight confirmation number (PNR) and ticket number with you at the SYD check-in. Mention to the agent that you want to interline your bag on a connecting flight as you are presenting it to them.

They should do it, but no guarantees.