Originally Posted by airbus320
Flew back home at another low altitude. FL240. Today must have cost a small fortune for fuel as all YWG flights to and from YYZ were done at lower altitudes than usally flown.
Contrary to what has been spoken here before.
One does not know if there is a significantly higher burn between the two altitudes unless flight plans have been run and then the two compared. I have seen many many flight plans where going lower only resulted in a minor increase (and once or twice a decrease) in fuel burn.
It all depends on the strength of the upper level winds. Particularly on the return your headwinds might have been considerably less than normal lower down.