Source : Webster's Revised Unabridged Dictionary (1913)

Overfly \O`ver*fly"\, v. t. [imp. {Overflew}; p. p. {Overflown};
   p. pr. & vb. n. {Overflying}.]
   To cross or pass over by flight. --Byron.

Source : WordNet®

overfly
     v : fly over; "The plane passed over Damascus" [syn: {pass over}]
     [also: {overflew}]

overflew
     See {overfly}