From recollection, around 250,000 passengers flew between LGW
last year (on the daily easyJet and 2/3 daily BA
flights?) and over 100,000 more on the daily easyJet LTN
Not bad for a town of only just over 60,000 population, but it's not just about that of course. The realistic airport catchment is more like 300,000 to 400,000 when you include travellers from as far as Skye, Fort William and Wick, who have little other alternative getting to the South of England.
I used to love the smell of Jet-A in the morning...