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Southwest is currently running a pretty good promotion. After registering, if you book one round-trip flight departing by May 24 or two one-way flights by April 5, you can directly earn a Southwest Companion Pass. However, this Companion Pass does come with some restrictions: it is only valid from August 15 to September 30, and it can only be used on paid cash bookings. Award tickets are not eligible for this buy-one-get-one benefit.
