Cabin altitude
Cabin altitude is the effective altitude of the air inside a pressurised aircraft while it cruises much higher. Airliners typically hold the cabin at 6,000–8,000 ft; modern business jets do better, with the Gulfstream G700 and Bombardier Global 7500 keeping the cabin near 3,000–4,500 ft at cruise, and Falcons and Citations in the 4,000–6,000 ft band. A lower cabin altitude means more oxygen in the blood, less fatigue, headache and dehydration and a real reduction in jet lag on long flights. It is one of the least visible but most valuable comfort features when comparing aircraft, and it matters most for elderly passengers and anyone with heart or lung conditions.