How far apart are JFK and EWR?

The distance between John F. Kennedy International Airport (JFK) and Newark Liberty International Airport (EWR) is approximately 16 miles.

1. **Travel Time and Modes**: The estimated travel time by car is between 45 minutes to 90 minutes, depending on traffic conditions. Public transportation options, such as NJ Transit and AirTrain, are also available but may take slightly longer. More expedient options like helicopter transfers are also available for a higher price.
2. **Distance Calculation**: The straight-line distance or great-circle distance between the two airports is calculated to be 20.8 miles using the Vincenty's formula and the haversine formula, which are precise methods accounting for the Earth's ellipsoidal shape.