FlyerTalk Forums - View Single Post - Minimum Connection Transfer Time at Seattle (SEA): The Definitive Thread
Old Sep 23, 2021 | 3:10 pm
  #383  
Mountain Explorer
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I think you'll be fine. Your test result and vaccine paperwork will be checked at LHR, and then again at YVR. There won't be much in the way of covid checking at SEA (US CBP mostly relies on the airlines to do the checks for them). If you do misconnect, you won't be penalized for taking the later flight
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