The average conference costs about $2000 to go to, all told. 

The costs are travel, lodging, conference fees, and food. 

You can try to get funding for the travel even if you're staying a few days extra for vacation (but not the extra lodging or food costs, obviously).

When applying for travel funding there are three main sources: Graduate Studies, the Grad Students Association (GSA), and your supervisor.

Graduate Studies

 - in progress

Grad Students Association (GSA)

The GSA awards up to $200 for 50% travel costs not covered by Graduate Studies.

The GSA shall award 50% of the travel costs not covered by other sources, to a maximum of $200. The minimum cost (to the student) must exceed $50.00. Candidates are entitled to apply for more than one grant per fiscal year (01 May to 30 April),

Application Form.pdf

Supervisor

You can ask your supervisor if he or she can put some money toward the conference as well. How much they can help depends on how much grant money they have. How much they will help depends on that, how expensive the conference is (travelling abroad is more expensive), how many other students need funds too, your personal need, and their personal interest in your attending the conference. 

Best is if you're delivering a talk that the supervisor has co-authored. Next best is a paper you've authored yourself, but with that supervisor's supervision. Next best is you're delivering a paper that is unrelated to your supervisor, and last is if you want to go without delivering a paper.