Firearms Act
RCMP and the transport regulations. Whether you may lawfully have and move the firearm.
For a non-restricted firearm: Unloaded. That is all — no lock and no case required.
The rules that apply no matter which airline you fly. These come from CATSA, Transport Canada, the RCMP Canadian Firearms Program and the CBSA.
A Canadian flying with a firearm has to satisfy three separate regimes at once. No official page merges them, and the strictest requirement in each row is the one that governs.
RCMP and the transport regulations. Whether you may lawfully have and move the firearm.
For a non-restricted firearm: Unloaded. That is all — no lock and no case required.
Transport Canada and CATSA. What may go into the cabin or the hold.
For a non-restricted firearm: Unloaded and in a locked hard-sided container.
Your airline. Whether they will carry it at all, and on what terms.
For a non-restricted firearm: Different for every airline — fees, notice periods, route limits.
Never stop at the first answer you find
"Unloaded is enough" is true under the Firearms Act and wrong at an airport. The locked hard-sided case comes from aviation security, and your airline may require more again. The strictest requirement that applies to your trip is the one to follow.
A separate regime from the three layers above: what SOR/98-209 requires of you before the trip starts. The rules differ by class in a way most summaries flatten.
Some questions have no published answer. Rather than guess, each page lists them as unanswered and names who to phone. FlyerArms publishes no flight steps for a prohibited firearm, because no official source sets out a route to fly with one, though the storage pages do cover what the regulations and the Amnesty Orders require. It also does not cover road or rail travel, provincial hunting regulations, non-residents flying into Canada, or US state law.