Delta Air Lines ranked as the highest-rated domestic airline in the U.S. According to Bounce's 2023 Airline Index, Delta recorded the highest percentage of on-time arrivals at 81.82% and one of the lowest cancellation rates at 1.96%.

In 2026, Qatar Airways and Singapore Airlines consistently battle for the top spot in global rankings, such as the Skytrax World Airline Awards. Qatar Airways is frequently praised for its "Qsuite" Business Class, which is widely considered the best in the world, as well as its high standard of service and modern fleet. Singapore Airlines is equally renowned for its consistent excellence across all cabins, particularly its "Suites" on the A380 and its exceptional cabin crew training. Other top-tier airlines in the 2026 rankings include Emirates, known for its extravagant First Class and vast network, and ANA (All Nippon Airways), which is celebrated for its punctuality and Japanese hospitality. In the "Safety" category, Etihad Airways and Air New Zealand often take the highest honors for their immaculate safety records and operational transparency. In the North American market, Delta Air Lines typically receives the highest ratings for operational reliability and passenger comfort compared to its domestic peers, though it generally ranks lower on the global stage than the Middle Eastern and Asian giants.