Earlier this year, Google added the ability of flight delay predictions. But now the Google Assistant will proactively warn you if it predicts a flight delay and tells you why.
So when you say, “Hey Google, is my flight on time?”, then the Google Assistant will be able to give you the predicted delay status and the flight status, so you plan accordingly.
Google uses machine learning and historic flight data to do this. They also say they have an 85% confidence rate when making its predictions. The new feature will be rolling out over the next few weeks.