Dense Fog and Operational Bottlenecks Trigger Massive Flight Disruptions Across India During Peak Travel Week

Fog Brings Aviation to a Standstill

North India experienced one of the season’s densest fog episodes this week, dragging visibility at Delhi’s IGI Airport below the threshold required for safe aircraft movement. As the visibility dropped to near-zero during early morning hours, the airport implemented a series of low-visibility procedures that slowed runway operations dramatically.

Long-haul arrivals circled for extended periods, many diverting to Jaipur and Lucknow. Ground operations suffered heavy bottlenecks as taxiing aircraft lined up on runways, waiting for clearance.

Delhi: The Epicenter of Chaos

With IGI Airport handling one of the highest traffic volumes in the country, the fog-induced slowdown triggered a nationwide ripple effect. More than 250 flights were delayed over 48 hours, with dozens cancelled outright due to crew duty limits, curtailed slots, and cascading congestion.

Terminal crowds swelled as passengers queued for rebooking, while lounges struggled to accommodate the influx. Airline staff worked overtime to manage frustrated travellers demanding clarity on revised departure times.

Passengers Stranded for Hours

Passengers described scenes of confusion, with gates switching repeatedly and boarding processes halted midway as visibility fluctuated. Families travelling with seniors or infants faced severe discomfort as waiting times exceeded five hours in some cases.

Aviation experts noted that fog is not the only cause — increased winter traffic demand and limited buffer capacity make operations extremely sensitive to disruption.

Airlines Issue Travel Advisories

Major airlines issued advisories urging passengers to check flight updates before leaving for the airport. Several carriers relaxed rescheduling fees and allowed same-day changes for fog-affected flights.

Many travellers opted to postpone morning departures, shifting to afternoon and evening flights once fog conditions improved.

Mumbai, Bengaluru, Kolkata Also Affected

While northern airports bore the brunt, other metro airports experienced secondary disruptions due to aircraft and crew rotations. Mumbai saw significant delays in outbound flights waiting for inbound connections. Bengaluru and Kolkata also reported congestion due to diverted aircraft and rescheduled operations.

Technical Delays Add to Pressure

Beyond fog, several airports reported technical glitches at automated check-in kiosks and baggage handling systems. The simultaneous occurrence of weather delays and operational hiccups compounded overall congestion.

Why Winter Is the Hardest Season for Aviation

Aviation analysts explain that Indian airports face a unique combination of challenges during winter:

• Dense fog reducing runway visibility.
• High traffic volumes during holidays.
• Limited runway slots for peak-hour operations.
• Curfew restrictions at several metro airports.
• Crew duty-hour limits forcing cancellations.
• Handling constraints due to cold temperatures slowing equipment performance.

Runway Capacity Stretched Thin

Delhi’s airport, with three runways, operates near capacity during peak season. Low-visibility procedures drastically reduce runway throughput, causing a cascading backlog that takes hours to clear even after visibility improves.

Air Traffic Controllers Under Immense Pressure

Fog periods force controllers to operate under strict precision rules. Reduced visibility increases separation time between aircraft, slows taxi routes, and increases the risk of runway incursions. ATC teams operate at maximum alert during winter months to ensure safety.

Impact on Business and Holiday Travel

With December marking one of the busiest travel periods, business travellers, students, families, and tourists all faced severe delays. Many missed connecting flights, hotel check-ins, and important engagements due to shifting schedules.

Railways and Roadways Also Affected

The fog crisis spilled into other transportation sectors. Railways reported long delays due to poor visibility on tracks, while highways around NCR saw slow-moving traffic and temporary closures in fog-prone stretches.

Airlines Demand Infrastructure Upgrades

Airlines reiterated long-standing demands for:

• Additional runway capacity in NCR.
• Fog-resistant landing systems at more airports.
• Increased apron and taxiway capacity.
• Better crew rostering flexibility.

Lessons From the Disruption

Aviation safety analysts emphasize three critical lessons:

• Weather unpredictability requires greater scheduling buffer.
• Infrastructure growth must match rising passenger demand.
• Digital communication to passengers must improve to reduce frustration.

Relief Expected Only After Weather Improves

The IMD predicts that fog conditions will persist throughout the week, especially during early mornings and late nights. Full operational recovery may take several days even after visibility improves.

Conclusion: A Seasonal Crisis That Demands Structural Solutions

India’s aviation sector faces a predictable yet recurring challenge every winter. While safety remains the top priority, the disruptions underscore the urgent need for expanded runway capacity, stronger fog-handling systems, and more resilient schedules.

For now, passengers remain patient as airports navigate one of the toughest weeks of the season — hoping for clearer skies and smoother operations ahead.