>>12125309Short answer: rotational velocity is the same
Long answer: assuming they're both set at the same throttle, the low altitude airplane is faster and more efficient in the lower, more dense air, seeing as more air means more displacement means more lift, as well as denser air going through the turbine/prop.
In real life the company would slow the plane down at higher altitudes to save on fuel costs.
TL;DR- you're full of shit. Flights at higher altitudes take longer.
