Your flight will normally leave from Gate T in T-2. It is a long walk - around two hundred metres from the MLL. The bus ride to US commuter terminal, aka "East Beach" (east side of the airport) is for AC operated flights.

The MLL opens at 05h30 and your flight will start boarding 05h50. Of the 22 months traveling weekly mostly through IAD I only had enough time to grab an quick orange juice and some cereal.

My wife is in YYZ right now and she too mentioned the snow. She flies back to the US on Thursday on UA via ORD. The advantage of the 06h15 departure is that you will be among the first to the deicing pad.

Don't forget you have to go through US immigration and the line will start early. UA check-in opens at 04h30...US immigration opens at 05h00.

The ladies at UA in YYZ are great. They took care of me for about 22 months after I stopped flying AC. I live in YVR now but always plan to take a few extra minutes to check-in so to talk to the ladies.

Safe travels.

Cheers