BBC News - Tara McKelvey
Airports and airlines around the world are struggling to keep up as people begin to travel again in earnest after more than two years of the coronavirus pandemic - but are some travel hubs worse than others?
For four days in a row in early July, Toronto Pearson International Airport - the busiest in Canada, with flights to 155 cities around the world - experienced the most delays of any airport globally.
Flights leaving from Toronto via Air Canada - the country's largest airline - were also the most likely to be delayed or cancelled, according to aviation tracking website FlightAware.
In May, Canada said it was taking steps to help reduce air travel wait times, including by increasing staffing at major airports.
This month the Greater Toronto Airports Authority, which operates the airport, launched an education campaign for how "passengers and stakeholders" could work together to reduce delays, and acknowledged "various and complex" challenges.
It said in a statement that all industry partners "together must expeditiously implement reforms that will make smoother journeys for the remainder of summer and beyond".
But epic delays, long queues, cancelled flights, and lost luggage is not just an issue in Toronto.