Flights across the world can be cancelled for different reasons on the same day, and the specific cause depends on your airport and airline.
Major causes today
For 15 December 2025, news reports show that a significant number of cancellations in India, especially at Delhi’s Indira Gandhi International Airport, were due mainly to dense fog and very low visibility, which made it unsafe for many aircraft to operate. Airlines such as IndiGo and Air India proactively cancelled multiple flights from Delhi and on routes linked to Delhi to avoid unsafe landings and long knock‑on delays.
In addition, some airports in North India and nearby regions reported cancellations and delays because their operations are tightly connected to Delhi, so disruption there propagated through the network. Airport and aviation authorities issued fog advisories asking passengers to check flight status before leaving for the airport, indicating weather as the primary driver of cancellations in that region today.
What this means for you
If your flight was cancelled today, the exact reason will depend on your origin and destination airport, but the most common causes are:
- Local weather (fog, storms, snow, or high winds) affecting take‑off or landing minima.
- Network effects from a major hub (like Delhi) where earlier weather‑related disruptions leave aircraft and crews out of position, forcing later cancellations elsewhere.
To know the precise reason for your specific flight, check your airline’s app or website and the real‑time cancellation boards for your departure airport, which usually list current disruptions and general causes such as “weather” or “operational constraints.”