I have non-reved all over the world since 1958.
As a non-rev the most I ever paid was about US$150 (ID 90) to fly LHR
to NBO on British Airways.
As a non-rev the LEAST I ever paid was US$2.50 per flight segment on the original Frontier Airlines as a employee's spouse.
As a revenue passenger (non-business travel, where I am paying the fare) the most I have paid is about US$625 to fly ICT
Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.