Severe thunderstorms that swept across the canton of Zürich on Tuesday evening, 30 June 2026, caused chaos at Zürich Airport, leaving hundreds of passengers stranded overnight, 70 flights cancelled, and more than 30 aircraft diverted to airports in Stuttgart, Geneva and Basel.
The storm hit at its most damaging during the late evening hours, when the airport was still in full operation. Lightning within a five-kilometre radius of the airport triggered a mandatory ground handling stop, during which no loading, unloading, fuelling or boarding via outside stands is permitted for the safety of ground staff — a protocol that immediately freezes the apron and causes flights to queue, delay, and ultimately cancel. Inbound aircraft approaching Zürich after 9 p.m. were held in holding patterns before eventually being diverted.
Special Operating Permit Granted For Beyond Zürich Airport’s Normal 11:30PM Curfew
A total of 44 flights were cancelled on Tuesday evening alone, 24 landings and 20 departures. To manage the backlog, airport authorities obtained a special operating permit beyond Zürich Airport’s normal 11:30 p.m. curfew, allowing 14 additional landings and 15 further departures to take place through the night. Even so, many aircraft and their crews ended up stranded at diversion airports, creating shortages that cascaded into Wednesday’s schedule. By 7:00 a.m. on Wednesday, 70 flights had been cancelled in total.
For travellers caught in the crisis, the experience was harrowing. The airport was chaotic, with some facing multiple cancelled flights. Those diverted to Stuttgart faced their own ordeal: no hotel rooms were available at that hour, and some passengers were left to pay for their own onward transport.
The airport confirmed that several stranded passengers at Zürich were given overnight kits, and that help desks, security and border control remained open longer than usual to assist travellers. Passengers were advised on Wednesday morning to check their flight status with their airline before travelling to the airport.
Wednesday’s operations largely returned to normal by mid-morning, the airport said, though some cancellations continued as airlines worked through the residual crew and aircraft positioning shortfalls.
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Wider Storm Damage Across the Canton
The violence of the storm was not limited to the airport. Fire brigades across the canton of Zürich received more than 700 emergency calls during the night, dealing with flooded roads and storm damage. A lightning strike triggered a forest fire in canton Uri, adding to the already heightened fire danger across central Switzerland following weeks of drought and extreme heat. A level-three thunderstorm warning remained in place across parts of Switzerland until 8:00 p.m. on Wednesday evening.
