飞行的 UA4251 诺克斯维尔机场（诺克斯维尔） – 休斯敦机场（休斯顿）由United Express 2%次：周二, 周日。
航班時間是2小时 45分钟。
回程航班： UA4810, UA4887, UA4890, UA4900,
所有航班诺克斯维尔 — 休斯顿
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