It means the outbound travel is already taken.
that someone might have died
it was flown in 2014
This means that: he never thought that the bird could have left it's nest.
I/You/We/They have flown. He/She/It has flown.
1912 was when the first helicopter flown
descended? Driven (in a car, as opposed to flown in a plane). Walked (as opposed to having flown somewhere.)
1912 was when the first helicopter flown
Flown is the past participle of fly.
It is flown in reverse to signal distress.
The Eagle Has Flown was created in 1991.
Bird Has Flown was created in 1969.
The past tense form is flew. Flown is the past participle. fly - flew - flown