Never heard "flight" used that way, but maybe I'm not invited to the right parties. As for charger, Wordorigins cites the OED : The word first appears as the Middle English chargeour in the c.1305 work Legends of the Holy Rood:

"I was that cheef chargeour, I bar flesch for folkes feste."

The root in French is uncertain. It is either the Anglo-Norman chargeour meaning that which loads or the Old French chargeoir meaning a serving utensil. (Source: Oxford English Dictionary, 2nd Edition)