The longest flights in the world push the limits of commercial aviation by combining extreme distances with nonstop convenience. These routes typically exceed 8,400 miles and are operated using fuel-efficient, long-range aircraft capable of flying nearly a full day without landing. Airlines invest heavily in crew management, cabin air quality, seating ergonomics, and meal planning to enhance comfort on such flights. Popular ultra-long routes include Atlanta to Johannesburg, Bengaluru to San Francisco, and Paris to Perth. Understanding these flights gives travelers insight into global connectivity and the future of long-haul air travel.