How much would it cost to change my airplane ticket?

My dads step brother recently bought me a ticket online, I'm wondering how much it would cost to change the ticket? I'm going to San Fran from Vancouver for 5 days. The 25th to 31st and I want to be home for new years eve. The airplane ticket says I'll be back in Vancouver at 10:00 and I want to be home earlier. Ranging from a day to a few hours like 5:00 or 6:00 How much would it cost to change? It is Air CanadaHow much would it cost to change my airplane ticket?Most likely you purchased a nonrefundable ticket and most airlines charge a fee for change plus any difference in fare of the ticket. Depending on how booked the flights are, it could range anywhere from $150 to $1,000. How bad do you want to change it?How much would it cost to change my airplane ticket?a lot lol sorryHow much would it cost to change my airplane ticket?To much to even do itHow much would it cost to change my airplane ticket?The only one who can answer this question is Air Canada.... Good LuckHow much would it cost to change my airplane ticket?Depends on the rules of your ticket, a quick call to Air Canada is your best option.How much would it cost to change my airplane ticket?Usually around $150. SOmetimes its cheaper to buy a new ticket instead