Domestic passengers travelling through Vancouver International, Toronto Pearson, Calgary International and Montreal-Trudeau International airports will now have their temperatures checked as part of the screening process in Canada for COVID-19. 

Temperature checks were first introduced at Canada's four biggest airports for international passengers at the end of June. 

As of Thursday, passengers will also be screened before they can board a flight travelling within Canada. 

The update comes after several domestic flights travelling across Canada were found to have passengers who tested positive for COVID-19. 

The federal government flagged nine domestic flights on which someone was carrying the illness last week. 

Temperature screening stations will be placed in the departures section of the airports, according to Transport Canada.

By September, temperature screening stations will be in place in the next 11 busiest airports in Canada (St. John’s, Halifax, Québec City, Ottawa, Toronto – Billy Bishop, Winnipeg, Regina, Saskatoon, Edmonton, Kelowna, Victoria).

All passengers who have an elevated temperature and do not have a medical certificate to explain a medical or physical condition that would result in an elevated temperature, will not be permitted to continue their travel and will be asked to re-book after 14 days.

“We have already introduced measures to reduce the risk of the spread of COVID-19, including mandating face coverings, and publishing health guidance for the air industry," said Minister of Transport, Marc Garneau.

"Mandatory temperature screenings are yet another measure in our multi-layered approach to help protect the safety of the travelling public and air industry workers.”