Which service will you likely use?
An UberX car can pick you up in ~2 min.
Distance between Stamford and JFK Terminal 4 is approx. 40.28 miles (64.82 km) with 59 min travel time.
This Uber estimate from Stamford to JFK Terminal 4
83 days ago.
Update the estimate to see the real-time fare prices with Uber in Stamford.