Originally Posted by
tuapekastar
Just how high does a country's airspace extend? I can't imagine collection of overflight fees from a space shuttle!
You are actually paying for Controlled Airspace service, and this has an upper limit, which varies a bit by country. In the US it is 60,000 feet, in Europe it's 66,000 feet - both well beyond what commercial aircraft are capable of. Mainstream airliners can typically get up to abut 45,000, and some business jets up to 51,000 feet. Concorde (which had specially designated corridors) excepted, of course !