Quote:
Originally Posted by acottawa
You’re saying two extra American customs and security clearances plus an Ottawa clearance is the same as one clearance in Toronto or Montreal?
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There's no hard and fast rule to least or greater number of security clearances on a single journey. This can change based on Airline(s) used and airports where you transfer. Customs is only once per country entry.
Depending on the airline(s) used, there can be more than one security clearance. For example, flying Ottawa to Dallas or even to Frankfurt, if the flight is Ottawa - Newark - XXX, there could be one or two security clearances. If flying AC, then connecting to UA at Newark, you would have to re-clear security in Newark again. However, flying Ottawa - Newark - XXX all on United there's only the single security in Ottawa.
Even on Domestic journeys (usually when booked through Expedia etc) one could end up with two security lines. For example, if the journey is all on AC or WJ, only one security clearance in YOW. However, if flying AC to Toronto then transfer to WJ, you would re-clear security in Toronto.
When booking internationally, it's important to pay close attention to the airlines you'll be using and the transfer airport to achieve the lowest number of security and custom lineups.