British Airways is one of the best airlines to fly with a Brompton — if your fare includes a checked bag allowance, your Brompton counts as one of your checked items at no extra charge. No sports equipment fee, no bike surcharge. The catch: you must call BA's contact centre at least 72 hours before departure to notify them you're bringing a bike. They need the dimensions of your case and approximate weight. The size limit is generous at 190 × 95 × 65cm, and the weight limit is 23kg standard, extendable to 32kg for a fee. For full-service long-haul travel with a Brompton, British Airways is hard to beat.