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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 36611 Dallas, TX 75235. 1  Contact Southwest Airlines by phone for the quickest response. With e-mail and regular mail, it can take from several days to several weeks to get a response.  When contacting the airline to lodge a complaint, keep copies of all correspondence sent and received for your records.