How do I pay for AirTrain at JFK?

Related questions

1. Is LGA or JFK better?
2. How much is a taxi from JFK airport to Times Square?
3. Which NYC airport is easiest to get to?
4. How do I get from Times Square to Statue of Liberty?
5. How many days do you need in New York?
6. Do you tip Uber?
7. Is there a shuttle from JFK to LGA?
8. Is Uber cheaper than taxi from JFK?
9. Why was JFK called Idlewild?
10. How can I get to JFK Airport from Manhattan?

Tags

1. #system
2. #beach
3. #howard
4. #cards
5. #boulevard
6. #station
7. #travel
8. #airtrain
9. #enter
10. #metrocard
11. #unlimited
12. #under
13. #sutphin
14. #children
15. #either
16. #accepted