What to do when your connecting flight is cancelled on a separate ticket requires additional planning because different airlines may have different booking conditions. If your first flight and onward connection were purchased independently, the airline responsible for one booking may not automatically protect the other. Contact the airline that cancelled your flight and ask what assistance it can provide. Then notify the carrier operating your next flight before its departure time, explaining the disruption and checking whether changes are possible. Review the fare rules before purchasing another ticket, since reimbursement for a replacement flight is not guaranteed. Keep cancellation notifications, booking confirmations, and receipts together. Understanding the responsibilities attached to each reservation can help you avoid unnecessary costs and make a more informed decision about continuing your trip.