Only Air Canada is currently subject to the Official Languages Act. If Bill C‑13 were adopted, the Use of French in Federally Regulated Private Businesses Act , the UFFRPBA, would apply to WestJet and other carriers. However, they would not have the same obligations under the UFFRPBA other than those provided in the Official Languages Act.
Administrative monetary penalties, AMPs, should be applied everywhere that it is possible to do so, particularly for federally regulated private businesses.
But it goes beyond transportation. We also need to consider airports and services, but the fact remains that many airlines are not subject to the Official Languages Act.