I remember a thread like this from some Jewish guy in NY a few years back, did a search for it but cant find it. Basically the same kind of replies as this. When does the Sabbath actually run from, checked the EL AL website and some of their flights depart NY 11.30pm local time, is this outwith the sabbath? Is it sunset Friday to sunset Saturday? What happens if you are fling late on a Friday get delayed or diverted, you're pretty much scuppered then? Good luck.