A month-long Air Canada saga: from Congo to Newfoundland; bag found via Facebook in a restaurant in Philadelphia! This is definitely the one to beat.
https://m.youtube.com/watch?v=AQMk14AFR68
Full CBC story including AC finally reimbursing all expenses and shipping costs: https://www.cbc.ca/listen/live-radio/1-2-as-it-happens/clip/15961796-the-lunar-new-year-eclipsed