(Dallas, TX) — Southwest Airlines’ buy-one-get-one-free deal has a major twist.

Booking a round-trip ticket or two one-way tickets for travel through November 18th will land a free companion pass to use in early 2022.  The twist?  You have to buy now because the deal ends at the close of business today.

The passes will let travelers who qualify bring a companion for free on flights from January 6th through February 28th, 2022.  But again, today is the last day to get in on the deal.