MrsL I'm sorry it is too early for Autumn although I cleaned and waterproofed all my boots this morning!
After the bank holiday
Autumn perfumes are, IMO September - November (specifically Bonfire Night, but I accept I love rules too much). So then it would be Winter perfumes, Opium, Shalimar, Karma and the like. Perhaps am I overthinking. I don't have a spreadsheet honestly 
Adora the only thing I have bought recently was the PP Creed, I too am on a spending embargo (is that the right word?) Teenagers and Summer holidays - not a good combination. The amount of bread and milk we go through 
Fennel have a fab holiday. No suggestions for 11 hour flight save Valium and vodka. Perhaps a light blanket with a lavender spray? I'm terrified of flying though, scented blanket would be for over my head. At duty free I would be spritzing lovely things on a mouliette (I just like to say that) and putting them in my cabin bag!
SOTD is Narcisco Rodriguez for men sample (don't ask, I wanted to try the womens') but actually I like it on me.