You better be quick in whatever you do.
The loonie just up another penny today to almost 0.72 USD. The market rate is around 1 USD for 1.391 CAD at this time but unless you are a major financial institution or a multi-billionaire, you won't get this rate. So as of today, you are looking at a rate of maybe 1.35~1.36 if you charge it on a credit card for a dollar US. To make the matter worse, the majority thinks it's going towards 0.75 USD. If that's the case, you may get as low as 1.2X something on your credit card so be cautious.