Southwest Airlines Companion Pass Free w/ Flight Purchase at Ben's Bargains Ends 9/5. Southwest Airlines is offering their Rapid Rewards Members (free to join) a Companion Pass for free when you book a round trip or two one-way flights by 9/5 and travel by 11/20. Companion flies free with you from 1/6/2025 to 3/6/2025. Posted by DrBatman09/03/2024 at 05:05 PM PT