As PanEuropean said, there's almost certainly no widebody air cargo capacity from Halifax to Europe. I assume you intend to ship by sea, and your intention is to minimize the distance over water on your map? Send it from the easternmost port in North America to the westernmost port in Europe...
The problem is that while Halifax is definitely a major container port, Dublin kinda isn't. The major ports in Europe are the ones with easy distribution around the continent, and a port in Ireland would only reasonably serve Ireland. You are way more likely to find container space going to Rotterdam, Bremerhaven or Hamburg, than to anywhere in Ireland.
There is also the consideration that you will not be able to travel on the ship with your bike, and the ship will travel considerably slowly. You WILL need to sit around and wait for the bike to arrive.
If you have your heart set on Halifax, I would actually look into Eimskip and getting the bike sent from there to Reykjavik, where you can ride around Iceland and then take the regular Smyril Line passenger ferry from Iceland to Denmark.
|