/ Thesaurus / I Synonyms of in flight Find synonyms for: Adverb1. in flight, on the wingusage: flying through the air; "we saw the ducks in flight"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language