Would have been much better than going through the US/Canada border which has a full data sharing agreement between CBSA and US CBP/ICE.
(note: this is a stupid, humorous theoretical, not real advice on how to flee to avoid prosecution)
also, a note, any airline flight that crosses US airspace submits its passenger manifest to US CBP/ICE/DHS electronically as a database transfer, this has been a thing for 20+ years as a result of 9/11 and the PATRIOT act.