The female audio is bad for "vol" (says "volume"). Please disregard it. It cannot be fixed without replacing the entire audio package used throughout Duolingo French courses.
I said "the flight lasts FOR ten hours" and was marked wrong. But this is what we - well, I - would say in English?
I would only say "the flight lasts ten hours" while I was on it. How would I translate "the flight takes ten hours (to get there)"?
Thinking in English, "the flight takes ten hours" is the same in French "le vol dure dix heures".
"Lasts" is a bit weird in this context. Would think "takes" makes more sense unless being on the flight is the preferred condition.