Originally Posted by
worldtraveller73
That is correct. With the exception of the Phillipines Airlines and Cathay flights to JFK, there are no flights to the US departing from the international terminal. All the Delta flights leave from the US Transborder area where there is US CBP pre-clearance. I can't speak for whether CATSA will let you into the international area with a US boarding pass. I don't even think there is a public walkway between international & US departures on the concourse. . .
There may be on exception. If transferring off a domestic flight onto a US flight the normal route for making this connection is Domestic Concourse to International Concourse and from International to Trans-boarder.