I'm on a trip to USA from Perth just now and on a return QF J class.

I'm on a trip to USA from Perth just now and on a return QF J class. I come home in September - do you know if the free limo service is "retrospective" to flights already booked?

After reading David's story, I would ring Qantas ASAP and definitely request the service, as assuming the service starts ASAP, you should be eligible.  Have a great trip, and good luck!

If it is available, the option to book it should appear on your bookings page. Under the heading Customise your journey there is a picture and heading Chauffeur Drive. Clicking here will allow you to book. It only appears if you have access to it. Otherwise, as above, give them a call.