There is (since 2023) a train that connects directly from Grand Central to JFK AirTrain.
replyAirtrain opened in 2003 [1]. It connected to the subway system and, through Jamaica, Penn Station. The novel bit in 2023 was also linking into Grand Central.
replyHuh. Google Maps was not showing me that.
replyEDIT: Oh, wait, misread, I thought you meant a direct train from Grand Central to the airport.
> a direct train from Grand Central to the airport
replyIt’s a single, low-bullshit transfer. Frankfurt Airport also requires a connection for terminals 2 and 3 [1].
[1] https://www.frankfurt-airport.com/en/transport-and-parking/t...