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Southwest Airlines Reservations Phone Number: 1-800-I-FLY-SWA (1-800-435-9792) Above mentioned number is Southwest Airlines customer service, Reservation, Information toll free number for passengers, Using this number you can able to Reserve your ticket from your home itself. Read also: Delta Airlines Customer Care.
Box 36647-1CR Dallas, TX 75235. 1  Phone Number: Call 1-214-792-4000 to reach Southwest Airlines corporate office. 2  Email: There is no email address listed for Southwest Airlines headquarters. 3  Website: The official website for Southwest Airlines [+] is the investor relations side of the main retail website.