score:5
Info is subject to change, but as the writing of my answer, here's a summary:
Other criteria for travel must be met (e.g. not having visited certain countries, a reasonable reason to travel, etc). But for the most part as a Canadian you should be good to travel by air.
Government websites are sometimes dense, but the rules are constantly evolving, so they remain your best source.
Many airlines also have wizards to help you navigate requirements like this one from American Airlines.