Originally Posted by
canadiancow
Airlines are in very unique positions to make very good residency estimates. If 80% of your flights originate/terminate in YYZ, you almost certainly live in YYZ. I often book one-ways, but either I'm taking multi-day trips to YYZ, or multi-month trips to SFO. Though in either case it would be hard to argue I don't reside in SFO.
Actually, that's not necessarily a surefire way to do this. Let me present a scenario that several former Florida-based coworkers used. They started out with the traditional Florida - Toronto round trip thing. They would be around 2-3 days every two weeks. Then their schedules started to get a little weird and their stays would become variable depending on meetings and protects and tasks. So some of them got together and rented an apartment in downtown Toronto and bought a one way ticket to YYZ. When they knew when they could leave and when they would need to be back, they would buy the round trip ticket. It ultimately made things easier on them (at least pre-covid).
But to AC, that would make them appear to have re-located to Toronto instead of being based out of Florida.