However, commercial airliners typically cruise at around 35,000 feet, and private jets can go even higher up to 51,000 feet. The high cruising ... more fuel while flying low.

Too low and thick air would cause more fuel burn. Too high ... gain greater speed, fuel efficiency, and smoother flight ...

Residents of a Scots village were stunned after spotting low-flying RAF jets training nearby. Connel, in Argyll and Bute, was treated to the spectacular sight on Wednesday April 2 as the jets took ...