The passengers don't know about the flight plan. The screen at the gate and tickets just say Tel Aviv to Amsterdam. But the formal flightplan says Tel Aviv to A

The passengers don't know about the flight plan. The screen at the gate and tickets just say Tel Aviv to Amsterdam. But the formal flightplan says Tel Aviv to Antwerp with Amsterdam as the destination alternate. You go to Amsterdam 99% of the time, only when the weather is bad you could end up in Antwerp. But that happens to "normal" non-replanned flights as well, if weather at the destination is bad they could also divert to Antwerp.