These are lists of the busiest airports in the United States.
ð iː z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY l ɪ s t s WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY b ɪ z i ɪ s t WORD_BOUNDARY ɛ ɹ p ɔ ɹ t s WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY j uː n aɪ t ɪ d WORD_BOUNDARY s t eɪ t s WORD_BOUNDARY