(Adrian Wyld/Canadian Press)

By Your Voice Team, CBC News

Porter Airlines insists it's moving ahead with its "regular schedule" on Saturday and Sunday despite "extraordinary security measures" being implemented downtown for the G20 summit.

The airline has warned of some "minor delays" and that "new information" could cause some plans to be "adjusted."

Porter spokesman Brad Cicero says the airline, which flies in and out of the Toronto Island airport, has not been told it might have to cancel flights as part of the security plan.

"Our instructions are the commercial service will operate as normal," he said. 

Cicero says the only change is that the airline is not operating its shuttle buses because their regular route  to and from the Royal York hotel goes right through the security zone.

The airline is asking passengers to allow more time than usual for getting to and from the island airport and to continue to check its website for flight information.