The Southwest Companion Pass is arguably the most powerful perk in domestic aviation because it allows for unlimited uses during its entire period of validity. Once you earn the pass (by flying 100 qualifying one-way flights or earning 135,000 points in a calendar year), your designated companion can fly with you for just the cost of taxes and fees (starting at $5.60) on every single flight you take, whether you paid for your ticket with cash or Rapid Rewards points. There are no "blackout dates" or limits on how many times the companion can fly with you in 2026. While the usage is unlimited, the companion person is not; you are only permitted to change your designated companion up to three times per calendar year. This means you could travel with a spouse in the spring, a child in the summer, and a friend in the fall. In 2026, with Southwest's transition to assigned seating, both you and your companion will still be able to secure seats together, provided you add them to your reservation before the flight's inventory is fully committed, which remains a seamless process through the Southwest mobile app.