One additional point on this: I understand based on CBC's reporting that the Quarantine Act does not empower federal government to mandate contract tracing information be provided by airlines except for foreign nationals. So you can take that in a bunch of ways: AC has the capability but just can't be fussed to do it for domestic flights; they actually do collect additional information for foreign entrants to the country on international flights (not sure what besides relevant visa information) or that the federal government just can't be fussed to amend the Act to allow them to mandate the information be collected or make the demand of the airlines. Amongst others.