Region of Waterloo International Airport - YKF

[SammyOES]

I would guess the boarding pass issue is that a human had to verify your ID before giving you a boarding pass to fly. This happens whenever someone in my family switches passports. The bus isn’t actually a flight, so I assume has more relaxed rules. Not really a bus vs no bus thing since either way you needed someone to issue the passport. Although, arguably much nicer in Waterloo.