Part of it depends on where in CT. Driving from along I-95 (New Haven, etc.,), especially closer to NY, it might be easier to get to JFK as you would avoid the Cross-Bronx Expy and the GWB to get into NJ. (There might be better ways to get to EWR; I'm not that familiar with that route.) Coming from further north along I-84 (Waterbury, Danbury, even Hartford), I would say it's easier to get EWR via the Tappanzee and Garden St Pkwy. (I drive Boston to NJ every couple of weeks, so I know the I-84 route very well.) I have to admit, however, I don't know the route to JFK well as we lived near the junction of the Prospect Expy and the Brooklyn-Queens Expy, much further west than the airport. My wife's Aunt and Uncle live in Westchester Co and generally fly from LGA. They flew from EWR a while back and commented on how easy the drive the airport was. (If you from further north in CT, have you also considered Stewart Airport in New Burgh, NY? It's near where I-84 & I-87 (the NY Thruway) come together and is served by JetBlue direct to MCO.)