To be honest, if you're taking the or the LIRR to get to LGA from Manhattan, chances are you're not gonna want to ride to pretty much the end of the line to get the Airtrain when you can just take the Q70, which can take you to the airport in 10- 15 minutes. I feel like people would only take the Airtrain if they're coming from from like Bayside or Whitestone.