Lukla Airport (Tenzing-Hillary), Nepal

A 527-meter runway carved into a Himalayan cliff at 9,334 feet with a 12% gradient offers no go-arounds, making this Everest gateway statistically one of the deadliest airports on Earth. Pilots must navigate a sheer drop at the runway's end, landing uphill to slow down and taking off downhill to gain speed. This perilous profile, combined with unpredictable mountain weather, solidifies Lukla's reputation as the world's most dangerous airfield.