Full Breakdown
Severe Thunderstorms Paralyze Heathrow and Gatwick, Trigger Widespread Flight Delays
6/27/2026, 9:41:05 PM
Storm-Induced Flight Disruption at London’s Busiest Hubs
On Saturday 27 June, severe thunderstorms sweeping across southeast England forced the United Kingdom’s air-traffic control service (NATS) to impose temporary restrictions at Heathrow and Gatwick. The weather-related measures halted or slowed arrivals and departures, leaving hundreds of flights delayed and dozens cancelled. NATS warned that the disruption would persist through the night and into the early hours of Sunday.
Heatwave Background and Weather Development
The storms followed three consecutive days of record-breaking June heat, during which the Met Office issued an amber extreme-heat warning for eastern and southeastern England. A subsequent yellow thunderstorm warning highlighted the risk of lightning, heavy rain and localized flooding. The hot, humid air mass destabilised, producing intense convective cells that moved over the London area in the early afternoon.
Scale of the Disruption: Numbers and Delays
Flight-tracking data from FlightAware recorded 367 delayed flights at Heathrow and 352 at Gatwick by early afternoon. Other outlets reported more than 600 delayed flights across the two airports, with some estimates exceeding 700 and a separate source citing over 1 000 affected flights nationwide. Reported delay lengths ranged from three to six hours, while a few services were postponed up to 11 hours. Passengers were stranded on board aircraft for four to five hours while waiting for take-off slots or for the weather to clear.
Official Statements from NATS and Airlines
NATS explained that aircraft must “avoid affected areas and be spaced further apart,” limiting the number of movements per hour and prompting the temporary flow-restriction. The agency expressed frustration at the inconvenience but pledged close coordination with airlines and airports to reduce impact. British Airways confirmed adjustments to parts of its schedule, and easyJet announced pre-emptive cancellations at Gatwick, offering rebooking, refunds, hotel accommodation and meals to affected travellers.
Passenger Experience and On-the-Ground Reports
Travelers described long queues at departure gates, crowded terminals and aircraft held in holding patterns or diverted to alternative UK airports. A points failure at Heathrow Terminal 5 disrupted Heathrow Express and Elizabeth line services, compounding airport-access problems. Passengers were repeatedly advised to verify flight status via airline apps and to retain boarding passes for any future claims.
Criticism and Calls for Better Communication
Consumer-rights groups and some passengers criticised the scarcity of real-time updates and the difficulty of securing assistance during prolonged waits. While easyJet’s spokesperson highlighted proactive notifications, several travellers reported insufficient information and limited immediate accommodation options.
Conflicting Figures and Reporting Gaps
Sources differ on the total number of affected flights—ranging from “more than 600” to “over 1 000”—and on the maximum delay length, with some reports citing six-hour delays and others noting an 11-hour postponement. Detailed data on knock-on effects for connecting flights remain anecdotal, leaving a gap in the full network impact assessment.
Verbatim Quotes
- “Severe thunderstorms across the south east of England and Europe continue to impact flights, and this is expected to continue for the remainder of today and overnight.” — NATS, UK air traffic control
- “To ensure the safety of the travelling public, aircraft need to avoid affected areas and be spaced further apart, which limits the number of flights that can operate safely.” — NATS, UK air traffic control
- “We are doing all possible to minimise the impact of the weather disruption for our customers and are notifying passengers in advance with their options to rebook or receive a refund as well as hotel accommodation and meals where required.” — EasyJet spokesperson
- “Heathrow and Gatwick Flights Delayed: Advice for Passengers Check Status: Do not travel to the airport without confirming your flight status directly via your airline’s live tracker or app.” — Travel advice, Sunday Guardian
- “Under such conditions, air traffic managers typically reduce arrival and departure flows to maintain safe separation between aircraft and avoid routing traffic through the most active storm cores.” — Aviation safety explanation, The Traveler
What’s Next for Travelers
The Met Office forecasts additional showers and isolated thunderstorms across southern England into Sunday, potentially extending air-traffic restrictions. Passengers are urged to monitor airline apps and airport departure boards, allow extra travel time, and keep receipts for meals or accommodation that may be claimed under duty-of-care provisions.
