Whether you can cancel a portion of a flight ticket (such as just the return leg of a round-trip) depends on the airline's fare rules and whether the ticket is partially used. Most "non-refundable" or "basic economy" tickets do not allow for partial refunds; if you miss or cancel the first leg, the airline typically cancels the entire itinerary. For standard tickets, you can often cancel the remaining portion, but you are unlikely to receive a 50% refund. Instead, the airline may recalculate the price of the journey you did take as a more expensive one-way fare and provide the difference (minus a cancellation fee) as a travel credit. In 2026, some flexible "fully refundable" fares do allow for prorated cash refunds on unused legs. However, for most passengers, it is often more cost-effective to check if the ticket allows for a "change" to a future date rather than a flat cancellation, as rebooking fees are frequently lower than the cost of a new one-way ticket.