Just looked at google flights and seeing many fare in $482-630 range.
Have you looked at google flights. If not , try Toronto and Buff and see the difference.

I do recall gong to a wedding in Toronto a few years ago was about to blow a ton of money for Jfk-Toronto when my friend suggested JFK-BUF and drive up. Saved me over $259 per ticket. Landed in BUF and having never been there, visited 3 Buffalo wing establishments within 3 hours before taking the scenic drive up past Niagara. Great times and $$$ saved.