What are the current regulations regarding traveling on an airplane with a guitar or other musical instrument?

The rule requires that each U.S. carrier subject to this regulation allow a passenger to carry into the cabin and stow a small musical instrument, such as a violin or a guitar, in a suitable baggage compartment, such as the overhead bin or a closet, or under the seats, in accordance with FAA safety regulations and the carrier’s FAA-approved carry-on baggage program.

For complete information on this topic, click here to view the official briefing from the US Department of Transportation.