Canada stands out for massive delays this summer. About half of arrivals were delayed at two of its largest airports — Toronto Pearson and Montreal-Trudeau. More than a third of flights at Vancouver’s airport was also delayed.
Air Canada rolled out a policy allowing airport and itinerary changes this summer specifically to address “longer than usual delays” at Toronto Pearson.
Airports in European travel hubs — Frankfurt, London, and Paris, among others — were also plagued with delays during the period from late May through early September.

Here are the airports with the highest percentages of flights delayed around the world:
1. Toronto Pearson International Airport: 51.9%
2. Montreal-Trudeau International Airport: 47.8%
3. Frankfurt International Airport: 44.5%
4. Humberto Delgado Airport (Lisbon): 43%
5. London Gatwick Airport: 42%
6. Paris Charles de Gaulle Airport: 41.6%
7. Munich International Airport: 40.1%
8. Manchester Airport: 39%
9. Athens International Airport: 38.5%
10. Vancouver International Airport: 37.8%
A huge chunk of this summer’s flight cancellations happened in China.
Ongoing travel restrictions and snap lockdowns have put a huge damper on travel in China, and a strict Covid-containment policy has kept the country closed to most international travel since the pandemic began.
Still, Newark and LaGuardia made the global list for cancellations, at Nos. 9 and 10.

source cnn.com