FlyerTalk Forums - View Single Post - Transit thru YYZ question
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Old Aug 15, 2008 | 10:03 pm
  #3  
Rejuvenated
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Join Date: Dec 2003
Posts: 13,144
As said the airport is not designed for US-US connection. You will definately need to clear both Canada and U.S. immigration if connecting within T3 or T3-T1 vv. And you will need to clear U.S. INS and most likely Canada Immigration as well if you connect within T1.
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