As of 2026, Indira Gandhi International Airport (DEL) in Delhi, India, is widely considered the busiest airport in the world for the Airbus A320 family. The A320 is the undisputed backbone of the Indian aviation market, with massive carriers like IndiGo—the world's largest A320 operator—and Air India basing hundreds of these aircraft at the Delhi hub. On any given day, Delhi sees hundreds of A320 movements serving both domestic routes across the subcontinent and regional international flights. Following Delhi, major hubs like London Heathrow (LHR), where British Airways operates a large A320-series fleet, and Beijing Capital (PEK) also rank highly. The popularity of the A320 at these airports is driven by its efficiency for short-to-medium-haul routes and the ongoing global shift toward more fuel-efficient "Neo" versions of the aircraft, which allow airlines to maximize capacity in slot-constrained airports like Delhi and London.