If you don’t keep two days, there is no halachic issue, none at all. Don’t blame El Al. On the seventh of Sivan, Jewish calendars in Israel say Isru Chag, because it is a yom chol. They even discuss whether to say Lam’natzeach. Why should they print that it is the second day of yom tov? There is no second day. You attack El Al for having flights on yom tov, but the flight is not on yom tov.
Furthermore, you seem to expect El Al to provide entertainment for your eight week old for half a day in the airport. Here’s some old man advice. Feed the child, let him/her sleep on you or your wife, or a stroller. The baby will manage. He/she is eight weeks old and doesn’t really care where it is.After all, you were just stuck in an aluminum tube for almost 12 hours and seemed to manage.
When you attack El Al because they aren’t sensitive enough to your personal interpretation of chareidi coalition agreements, you have to back it up. When you unjustifiably attack an institution, don’t expect everyone to be empathetic. Too bad you cancelled your tickets, you would have had a nice minyan for mincha-maariv in JFK.