IMHO, carriers in Canada will (not might) fail in the months ahead so this discussion will be a moot point.
Care to elaborate on that?
WJA isn't going anywhere. Big Red, while experiencing difficulty (what else is new???), isn't going anywhere. Porter is expanding at a moderate and sustainable rate. Lots of other regionals and charters that are doing just fine.
No need to proclaim that "the sky is falling".