Gringo - do you live around NYC? It's probably 30 minutes on a good day. It can easily double, or triple, if the 30 minutes means crossing the Hudson in rush hour, a weekend, or a holiday. Crossing the Hudson can be brutal. Last trip the last 45 minutes, on a Saturday, took over three hrs.
There's a reason crews hate delays out of Europe flying into JFK, it puts them in rush hour going home. EWR, if you're staying west of the Hudson, isn't that painful.
He can plan on 4-6 trips per month. Guys deliberately bid schedules so they don't have to cross the Hudson. They live there and they understand the value of not having to cross the Hudson.
So if there's not an obvious difference between the two companies the drive is a major factor in NYC.