The flying boat in “golden gun” is almost certainly a model.. it looks very much like a “Lake” but without the cruciform tail. The flying car was likewise a model.
It was a real plane.
http://en.wikipedia.org/wiki/Republic_RC-3_Seabee
Cubby Broccoli used real aircraft wherever possible. You can see the crew putting out the burning plane after the scene was filmed at http://www.dailymail.co.uk/home/moslive/article-2085178/James-Bond-sets-Goldfingers-laser-scene-Moon-buggy-Diamonds-Are-Forever.html
My dad still owns and flies a Hershey Bar winged Piper Cherokee just like the ones Pussy Galore’s crew flew in Goldfinger.
http://impdb.org/images/thumb/c/cf/GFPiper_Cherokee.jpg/500px-GFPiper_Cherokee.jpg
I think it is a very real Republic RC-3 Seabee. The flying AMC Matador, however, now that was a model. Britt Ekland (Mi6 agent Goodnight) - not a model but is Swedish, while Maud Adams was a model and Swedish!