India’s aviation arteries clogged on December 6, 2025, as IndiGo Airlines, the nation’s dominant carrier, slashed over 200 flights in a cascade of cancellations rippling from Delhi to Dubai. Dense fog blanketing northern India, coupled with lingering pollution haze, plunged visibility to perilously low levels at key hubs like Indira Gandhi International Airport, forcing the low-cost behemoth to prioritize safety over schedules.