To cancel a flight booked with a Companion Pass (common on Southwest or Alaska Airlines) in 2026, you must follow a specific two-step sequence. First, you must cancel the Companion's reservation before you can make any changes to the Primary Traveler's ticket. Because the companion's ticket is "linked" to the primary booking, the system will not allow the primary flight to be modified while the companion is still attached. In 2026, this can usually be done via the airline's mobile app by selecting "Manage Trip," locating the companion's confirmation number, and selecting "Cancel." Once the companion is removed, you can then cancel or change the primary traveler’s flight. Any taxes or fees paid for the companion (usually around $5.60 each way in the US) are typically refunded to the original form of payment or held as a flight credit. If you cancel the primary traveler first by mistake through a customer service agent, it can "orphan" the companion ticket, requiring a 2026 help desk intervention to resolve the system error.