I've heard co-workers using interactivebrokers to do so. I found a blog post about it here http://blog.plsoucy.com/2012/11/best-way-to-convert-usd-to-cad-save-o

I've heard co-workers using interactivebrokers to do so. I found a blog post about it here http://blog.plsoucy.com/2012/11/best-way-to-convert-usd-to-cad-save-on-fees/ http://blog.plsoucy.com/2012/11/best-way-to-convert-usd-to-c... The fees are essentially max($2.50, 0.01%) but there's some restrictions (min $10k deposit, $10 monthly fee)