Bulls_Fan It sounds like what you want to do is find the tail number of the aircraft currently assigned and look at what flights it's currently assigned to. I usually use FlightRadar24 to get the tail number, then FR24 or FlightAware to see where that plane is and what it's schedule to fly.

I've also built a tool that predicts delays from situations like this, FlightForecasts.com. It's a web-based tool--no app required--where you put in your flight information and when you want to be updated, and you'll get emailed predictions about your flight.