IndiGo issues travel advisory as heavy rain disrupts Delhi flights

India’s largest airline IndiGo has issued a travel advisory for passengers flying through Delhi after intense rainfall and waterlogging at Indira Gandhi International Airport disrupted flight operations and raised the risk of delays and diversions.

Heavy rain, waterlogging and red alert hit IGI Airport

Delhi recorded another spell of intense rain on September 4, 2026, leading to waterlogging in several parts of the city, including areas around Indira Gandhi International Airport. According to published coverage, the India Meteorological Department placed the capital under a red alert for heavy to very heavy rainfall, warning of localised flooding and disruption to transport networks.

Reports indicate that the downpour affected ground operations at IGI Airport, with images and videos circulating online showing standing water on approach roads and forecourts. While the main runways have remained operational, taxi movements and apron activities have been slowed, contributing to knock-on delays across the afternoon and evening schedule.

Multiple media outlets tracking aviation movements noted that arrivals and departures faced longer turnaround times as ground crews contended with poor visibility, slippery surfaces and constrained ramp access. These conditions, combined with air traffic control spacing requirements during adverse weather, have reduced the overall capacity of the airport in the short term.

The red alert follows earlier spells of disruptive monsoon weather over Delhi this season, adding to a pattern of intermittent operational challenges at one of India’s busiest aviation hubs. Travel industry observers point out that such intense rainfall events are increasingly forcing airlines and airports to adapt with more dynamic contingency planning.

IndiGo advisory warns of delays and diversions

In response to the evolving situation, IndiGo issued a travel advisory on September 4, alerting customers that bad weather over Delhi had begun to impact its flight schedules. According to publicly available social media posts flagged in local coverage, the airline highlighted the potential for delays, rescheduling and diversions on services to and from the capital.

IndiGo’s update urged passengers to monitor real time flight status through its website and mobile app before leaving for the airport, reflecting standard practice when operations are constrained by external factors. The carrier also advised travellers to build in extra time for their journey to IGI Airport, given the likelihood of slower road traffic in heavy rain and waterlogged stretches of the city.

Flight tracking data compiled by news outlets showed a mix of delayed departures, extended holding patterns and a number of services diverted to alternative airports as the weather system intensified over Delhi and parts of the wider National Capital Region. Similar advisories were carried by other major Indian airlines, underscoring the breadth of the disruption.

Based on previous instances documented this year, IndiGo and other carriers typically adjust frequencies, swap aircraft and re-sequence rotations in such situations to stabilise operations once weather conditions begin to improve. However, the scale and timing of any recovery remain dependent on how long intense rainfall and associated air traffic restrictions persist.

Operational impact on domestic and international travelers

The latest bout of bad weather has affected both domestic and international passengers using Delhi as an origin, destination or connecting point. Reports from aviation data providers show that flights on key trunk routes linking Delhi with Mumbai, Bengaluru, Hyderabad, Kolkata and other metropolitan centres have been among those impacted, alongside select international services.

For travellers with onward connections, even relatively short delays at Delhi can result in missed links and same day rebooking challenges, particularly during peak evening and early morning waves. Publicly available information from flight schedules suggests that some services have been re-timed, while others have operated with extended ground time between sectors as crews and aircraft fall out of their planned rotations.

Industry analyses of previous weather related disruptions at IGI Airport note that the knock on effects can continue for several operating days, as airlines reposition aircraft, reassign crews and clear any residual backlog from the most affected periods. Passengers whose flights operate on time in the days following a major weather event can still experience aircraft changes or minor schedule shifts as part of this recovery process.

Observers also point out that Delhi’s role as a key hub for connections to northern and eastern India can amplify the ripple effects of local weather events. When departure flows from the capital are constrained, smaller regional airports may see altered timings, combined flights or delays even if local conditions there remain normal.

What passengers using Delhi should do now

Travel experts recommend that anyone scheduled to fly to or from Delhi in the coming days closely monitor airline communications and allow for additional flexibility in their plans. IndiGo’s own customer information channels emphasise that passengers should track their booking through digital tools and remain alert to any notifications about schedule changes or gate updates.

According to the carrier’s published conditions of carriage, delays and cancellations caused by adverse meteorological conditions fall under categories of disruption that may limit an airline’s liability in some respects, while still requiring reasonable efforts to reaccommodate affected customers on the next available services. Public information on the IndiGo website explains that options in such cases typically include rebooking on a later IndiGo flight, travel credit or refunds in specific scenarios, subject to prevailing regulations.

Independent consumer advocates generally advise travellers to keep documentation of any disruption, including boarding passes, booking references and receipts for essential expenses incurred while waiting for rebooked flights. While policies vary depending on the cause and length of a delay, having a clear record of events can simplify any subsequent claims or requests for assistance.

For those yet to depart for the airport, factoring in both potential road congestion and enhanced check in and security queues is particularly important during adverse weather. Experts suggest that passengers flying from Delhi while the current alert remains in place consider arriving earlier than usual and avoid planning tight ground connections immediately after landing.

Broader pattern of weather linked disruption at Delhi

The current advisory adds to a series of weather related interruptions that have affected Delhi’s aviation operations over the past year, ranging from heavy monsoon rains to dense winter fog. Previous episodes documented in June and earlier months saw periods when a significant majority of flights were delayed, with some carriers explicitly attributing cascading schedule impacts to conditions over the capital.

Historical data collated by airport and meteorological authorities show that IGI Airport routinely contends with challenging conditions across multiple seasons, from low visibility events in December and January to intense downpours during the peak monsoon. Airlines operating large networks from Delhi, including IndiGo, have increasingly integrated these patterns into crew planning, aircraft utilisation and customer communication strategies.

Analysts following India’s aviation sector note that as traffic volumes rebound and grow, the resilience of major hubs to extreme weather will remain a central operational concern. Investments in improved drainage, surface movement guidance systems and more flexible scheduling are among the measures being closely watched by industry stakeholders.

For now, passengers planning to transit through Delhi over the coming days are being encouraged by publicly available advisories and media coverage to stay informed, remain prepared for potential changes, and treat published schedules as subject to adjustment while the red alert and unsettled conditions continue.

Sources: The Economic Times: Delhi weather, IGI Airport waterlogging and IndiGo advisory; NDTV Profit: Heavy rain disrupts Delhi airport operations; The Indian Express: Red alert in Delhi amid heavy rain, flight diversions; NewsBytes: Heavy rain causes waterlogging, delays at Delhi airport; IndiGo: Conditions of carriage