Alireza Alivandivafa <DEmocrat2n@xxxxxxx posted >Re: Trip Report: YUL-ORD-YUL >I thought you pre-cleared customs in Canada and >transborder flights were treated as domestic. What >happened? Is it a Quebequois thing? yes I have heard you precleared US customs going to the US in Canada, but I belive you still have to clear Candadin Customs on transborder flights.going to Canada.