Do not wait until the airport to decide where a cello will travel. Korean Air’s special-baggage guide separates three routes: a small instrument in the cabin, a larger instrument on a separately booked seat, and a suitably packed instrument checked as baggage. A cello is usually a seat-or-checked-case decision, not an ordinary carry-on assumption. Ask the operating airline to confirm the route for your packed instrument and flights before relying on it.
Start with the instrument inside its travel case
Measure the case’s length, width and height, and record their sum. Korean Air says an instrument with combined dimensions of 115 cm (45 in) or less, such as a violin, can be carried in the cabin and stored in an overhead bin or under a seat. For an instrument above that threshold, such as a cello, its guide calls for a separate seat arranged in advance through the service center if it is to travel in the cabin. This is a booking step, not a request to place the cello in an empty seat on departure day.
Give the airline the case measurements, instrument type, route and flight numbers. Ask how to reserve and pay for the extra seat, how the instrument will be secured, and what confirmation should appear on the itinerary. If another airline operates a leg, ask that carrier to confirm its own acceptance for that flight. A payment attempt or an agent conversation is not proof that the seat is issued; check the final booking record before packing for cabin transport.
If you are considering the checked-baggage route
Korean Air permits instruments within the applicable checked-baggage allowance, with extra charges if the total baggage exceeds it. The guide requires an instrument hard case with internal cushioning and an instrument waiver at the airport counter. Its instrument section sets a checked limit of 203 cm (80 in) in combined dimensions and 32 kg (70 lb), directing larger or heavier instruments to a separate cabin seat or cargo handling. Compare the case with the rest of your checked bags, your cabin class and the actual itinerary.
Ask the airline whether your exact case can be checked on each operating flight and what the counter needs from you. Protect removable accessories before handoff, keep the bag tag and a photo of the packed case, and ask where oversized items are delivered at arrival. The waiver and packing requirement do not guarantee that an instrument will avoid damage. If you cannot accept checked handling, resolve the separately booked seat option before travel rather than arriving with a case that does not fit the ordinary cabin rule.
Confirm one transport plan before leaving home
Your confirmation should answer three questions: Which flight carries the instrument under which arrangement? Is a separate seat actually issued, or is the case accepted as checked baggage? What must you present at the counter? If the answers differ between legs, contact the operating airlines while there is still time to change the plan. Keep the written booking or service-center response with the case dimensions and baggage allowance you were given.
If an accepted checked instrument does not arrive, use the missing checked-bag guide to start with the last operating airline.
Last checked: September 29, 2026 KST. Confirm the actual case, operating flights and issued arrangement with the airline.