Flying with instruments: cabin, an extra seat and batteries

Flying with instruments comes down to one rule above all: policy varies by airline, so check your own airline's instrument and cabin-baggage rules before booking. A small instrument (violin, travel guitar) often fits in the cabin, but an ordinary guitar exceeds almost every airline's cabin-baggage dimensions – leaving an extra seat, a gate-check or the hold.

Two things are worth knowing up front: all loose lithium batteries and power banks belong in the cabin ONLY (never in the hold), and heavy backline (amps, drums) effectively doesn't fly – you rent it at the destination. This guide covers cabin baggage, an extra seat, the hold, batteries and insurance. The rules change – always confirm the details with the airline.

This is the article's most important "check first" point, because practice is strongly airline-specific:

• A small instrument (violin, viola, travel guitar) fits many full-service airlines' cabin-baggage limit (typically around 125 cm as the sum of dimensions). The instrument usually replaces your large cabin bag; a small personal item often stays as well.
• An ordinary guitar exceeds almost every cabin-baggage limit. It won't fit the overhead locker without special arrangement → an extra seat, a gate-check or the hold.
• Budget airlines are the strictest. Some offer no instrument exception at all: only an instrument that fits a small personal bag is allowed, otherwise you buy an extra seat or check it (for a fee).

A gate-check is a real risk. Even if the dimensions fit, the crew can order the instrument into the hold at the gate if it can't be stowed safely. Arrive early, ask for priority boarding, and print the airline's instrument policy to carry with you – it helps if the interpretation tightens at the gate.

For a cello or a valuable guitar you can buy an extra seat (airlines often call it CBBG, an item of cabin baggage given its own seat). The instrument travels strapped in with a seatbelt instead of the hold – far safer for a delicate instrument. The key points:

• You usually can't book it online – call customer service or book via a travel agent. The instrument is added to the same booking.
• The seat is typically a window seat, not in an emergency-exit row. There's often a weight and height limit for the instrument (it varies; roughly 45–75 kg and about 110–140 cm).
• The price is effectively in the region of a second ticket (often from about half the fare upward), but passenger taxes aren't charged because it isn't a person.

Exact weight limits, dimensions and price vary by airline – confirm them directly with the airline before booking, especially for a cello (the height limit can be a blocker).

If the instrument goes in the hold, it belongs only in a hard, impact-resistant case (flight case), not a soft gig bag. Airlines won't accept liability for an instrument carried in the hold in a soft case.

• Pressure is not a problem. The hold is pressurised and heated (it shares the cabin's air). The common story that pressure change stresses the instrument is a myth.
• Don't fully slacken the strings. Full slack doesn't protect against impact and over time can unbalance the neck (the truss rod and string tension are in balance). If you want to be safe, drop at most a semitone or a tone – and don't touch the truss rod.
• The real risks are cold, dry air and rough handling. Let the case warm up closed for about 30–60 minutes (longer in freezing weather) before opening it, so the finish doesn't crack from thermal shock. For an acoustic instrument, humidity control (a humidifier in the case) helps.

This is an often-forgotten but strict, internationally uniform rule (IATA/ICAO). Wireless systems, in-ear packs, battery-powered pedals and power banks contain lithium batteries:

• All loose lithium batteries and power banks belong in the cabin ONLY – never in the hold, in any capacity class. The reason: in the cabin the crew can detect and stop a possible overheating, in the hold they can't.
• Capacity limits: up to 100 Wh is allowed without separate approval; 100–160 Wh needs the airline's approval; over 160 Wh can't travel with a passenger at all. Protect the terminals against short circuits (original packaging or tape).
• Devices with a built-in battery (a wireless mic, IEM pack, laptop) are best taken into the cabin. If a device goes in the hold, it must be completely switched off.

Note: many airlines have also tightened the rules on using power banks (no charging during the flight, must be kept in view). Check your own airline's current terms.

Guitar and bass amps, stacks and a drum kit aren't worth flying: the excess-weight charges are large and the damage/delay risk is high (you might not make soundcheck). The established solution is backline rental – the promoter or a rental company supplies the amps and drums in the destination city based on your backline rider (a precise gear list). The band flies with only the instruments and "breakables" (your own snare, cymbals, pedalboard).

A large production may use air freight, but it's expensive and, when going outside the EU, often needs an ATA carnet (temporary duty-free export).

An airline's baggage liability is limited (in the region of €1,900 per passenger, not per instrument – the limit is internationally SDR-linked and changes) – a fraction of a professional instrument's value. On top of that, home or travel insurance usually doesn't cover an instrument used professionally, because it's classed as business/professional property.

• Get dedicated instrument insurance with explicit flight/transit cover. Read the terms: cover may require a hard case and an airline damage report (Property Irregularity Report).
• Document the value and serial numbers, and photograph the case's condition before the flight. The same list serves both an insurance claim and your carnet and CITES papers. Consider a tracking tag in the case.

• Check the airline's instrument policy before booking – dimensions, whether it's allowed in addition or as part of the allowance, the terms for an extra seat.
• Pack loose batteries and power banks in your cabin baggage – never in the hold.
• Don't trust a soft case in the hold – a delicate instrument needs a hard case, or take it into the cabin.
• Arrive early, mark the case FRAGILE and ask for a gate-check if you have to hand the instrument over at the gate.
• Don't fully slacken the strings out of fear of pressure – it doesn't protect, and pressure is a myth anyway.

A small instrument often travels in the cabin, an ordinary guitar less often – always check your own airline's instrument policy before booking. For a valuable instrument, consider an extra seat; in the hold only in a hard case, and don't fully slacken the strings (pressure is a myth; the real risks are cold, dryness and handling). Loose lithium batteries and power banks go in the cabin only. Heavy backline is rented at the destination. Get instrument insurance with flight cover, and document your instruments. The rules change – confirm the details with the airline.