There are stairs at Jamaica Station, just one flight of about 20ish steps. It's the only way to the platform too so it's busy. At least I've only used the stairs, I don't know where the elevator and/or escalator are after the turnstile, maybe someone else can help. Getting from the AIrtrain to Jamaica there is an elevator.
Also, you'll need to buy a metro card after you get off the Airtrain, before you get on the subway. I recommend putting enough for your round trip so you don't have to worry about getting delayed when returning to the airport, especially if you're traveling at an odd time.
Updated On: 6/1/17 at 01:18 AM