Best way?

The Subway, obviously 🙂

Down in the basement where most travelers don't even know that it exists. The original way to go between the terminals. Rather slow, but fun IMHO. And you have to look hard for the signs, because they're not easy to see and kind of hard to notice.

Of course these days everybody takes the Skyway which is the fastest way to go but with that much time on your hands you have plenty of time to even walk if you want to.

I take it when I have the time just for Old times sake 🙂

You will actually arrive in terminal D which is where all the other international airlines except for United arrive. United Airlines international arrivals are in E, but will get combined in the D E immigration area.

Say Hi to my brother when you get to Calgary 🤠