Originally Posted by
AntimonyER
If you are on Delta metal, you will be out of Terminal 4. It is the ONLY terminal at JFK that Delta uses, and that goes for KLM as well. However Air France uses Terminal 1. So if your flight is marketed by Delta but operated by Air France, you will have the scenario you wish to avoid. But since you said the non-stop to Berlin, that is 100% going to be Delta, and 100% going to be out of Terminal 4.
Great, thanks. Does that apply to arrivals at JFK too? I know of course the terminal could burn down and they have to relocate but normally are the arrival terminals as consistent as departures?
Thanks for the Air France reminder. For this trip I only want nonstop but good to remember in future. (changing topic, thought it was weird or a mistake that Google Flights lists the BER-JFK nonstop as Delta - Virgin but I checked and Virgin only just joined Sky Team in March; didn't know airlines can switch alliances.)