We understand what you're trying to say, and can temper the need for precision somewhat. FlyerTalk is an acronym-obsessed refuge, and many of us (over)use abbreviations to simplify typing while coincidentally muddying the message.

I think we understand that WJ is an accepted lay-person abbreviation for WestJet Airlines. It not being the official ICAO or IATA airline code is ok, because we're neither ticketing, filing a flight plan nor using it for any official purpose such as air traffic control.

By the way, OP, go WestJet. You'll likely board and disembark faster than if traveling aboard a widebody 787-9.