These rules were last checked on 10 Nov 2026, more than 100 days ago. Confirm on the airline's own page before you fly.
JetBlue rules
An instrument is allowed in place of one carry-on item if it can be stowed under the seat or in an overhead bin.
The standard carry-on size limits do not apply to instruments. Bin space is first come, first served and is not guaranteed.
If there is no space, JetBlue gate-checks it and returns it at the gate on arrival.
JetBlue aircraft have no closets for instruments.
Larger instruments such as cellos, upright basses and some guitars are accepted in a purchased extra window seat: up to 165 lb, not in an exit row, secured by crew, boarded first and taken off last.
The crew member securing it decides whether it can be secured safely.
Checked instruments pay no oversize or overweight fee up to 150 linear inches and 165 lb. Damage is covered only in a hard-sided case.