> 1 flight per day across the country Don't we already have same-day delivery? So the next tier would have to be quicker delivery than that, which would necess

> 1 flight per day across the country Don't we already have same-day delivery? So the next tier would have to be quicker delivery than that, which would necessitate more than one flight a day. Is it still economically viable in that case? Does this same economy math apply to passenger transport? Or could one flight per day of mail to the other side of the world be worth it?