Latest news, Dec 19, 2025: The server had a brief unplanned outage on the afternoon of Friday, December 19; some data regarding early-evening flights might have been lost. I apologize if this affected flight forecasts you were trying to see on this day.
It's too early to give you a forecast. I don't yet know the flight plan for UAL3773, so I can't give you an accurate forecast right now. Come check again closer to departure time. (Note that sometimes I don't know the flight plan until minutes before boarding!)
For best results, try it shortly before departure.
(Or, see a random upcoming flight's forecast.)