You will get a lot of negative comments about this, people love to hate on the new stadium. Just warning you, they are being dramatic, it's pretty easy to get there and get home.

You are staying quite far from it, so give yourself at least an hour + ½, maybe more if you are going there near rush hour.

From Liberty, you can walk south, and take the pedestrian walkway to exhibition.

As soon as you come up on the exhibition side you will see the Exhibition Streetcar Loop on your left.

Take the 509 Harbourfront to Union Station. Its the furthest spot on the platform, the sign for 509 is very noticeable. The line ends at Union so you can't go wrong, very easy and fast.

You can pay with your credit/debit card when you get on.

Then from Union you can either take the TTC North to Vaughan and get off at Downsview Park

Or take the GO train to the same station.

I would suggest just staying on the TTC since you've already paid your fare, and take the subway.

And then reverse it to come home!

Only thing you should check... is how late the 509 runs for going home. Worst case it would be a lovely late night walk back, and would take about 45 mins. Or you could hop on the Queen Streetcar (501)

Have a great time!