The Southwest Companion Pass is valid for the remainder of the calendar year in which you earned it, plus the entire following calendar year. For example, if you reach the 135,000-point threshold or fly 100 qualifying flights in February 2026, your Companion Pass will be active for the rest of 2026 and all of 2027. This makes it one of the most powerful "High-Fidelity" travel perks in the U.S., as earning it early in the year can effectively give you nearly two full years of "Buy One, Get One" travel. To maximize this, many travelers aim to earn the bulk of their qualifying points (often through credit card sign-up bonuses) in January. It is important to remember that your companion only flies for the cost of taxes and fees (starting at $5.60 each way), and you can change your designated companion up to three times per calendar year. If you earn the pass through a limited-time promotional offer (like "Fly one round trip, get a pass"), the duration is usually much shorter, typically lasting only two to three months.