Google Flights is your friend. Here is my itinerary which I have set as one of my home page tabs in Chrome, and it opens whenever I open the browser. So far the price has varied by one dollar since I started tracking a couple of weeks ago. YYC-EWR-BON
I will not be in a panic to book for a few months yet.
That's a good airfare from Calgary. More than twice as far as I fly to Bonaire from Atlanta for about the same price. Also a good cents-per-mile deal on the airmiles, if you get those.