Yes, you can cancel just one person from a multi-passenger booking in 2026, but it requires a process called "splitting the PNR" (Passenger Name Record). You cannot usually do this with a single click in the app. You must call the airline's customer service or use their "Live Chat" to request that the person who is no longer traveling be moved to a separate confirmation number. Once they have their own unique booking code, that specific "single-person" reservation can be cancelled. The refund or credit status will depend on the "Fare Rules" of the original ticket; if it was a non-refundable "Basic Economy" ticket, you might only get the taxes back or a partial future flight credit. In 2026, many major airlines like American and Delta have made this easier by allowing "Online Splitting" for certain domestic fares, but for international or group bookings, a manual intervention by an agent is still the standard to ensure the remaining passengers' seats and boarding priorities are not accidentally altered.