The airline said in a release it hopes to resume service June 1.

A judge turned down Tuesday a motion by Air Canada, Porter Airlines Inc. and 14 other carriers to freeze the traveller protections while the appeal is being dealt with.

The cancellation of Via Rail services due to blockades has left thousands of travellers in Toronto and the surrounding GTA stranded.

The Air Passenger Protection Regulations set out minimum standards for all carriers to follow and requirements to help the public understand their rights.

WestJet, Air Canada, Porter Airlines and Air Transat were all hit with penalties in August.

A legal challenge to Canada's new passenger bill of rights from a group of airlines is "ill-founded" and should be dismissed, according to the country's attorney general.

Travellers will have to wait five more months to see the full picture.

Porter Airlines, based out of Toronto's Billy Bishop Airport, says the online outage that affected its systems has now been resolved as of early Thursday morning.

A spokesperson for the short-haul airline said in a statement that delays and cancellations are expected, though some flights are still operating.

Hamilton International Airport says the Porter Airlines flight needed to make an unscheduled landing on Tuesday morning.