How much is the air ticket fare from Malaysia to UK?
The cost of ticket fare from kulalumpur to London is five hundred and thirty dollars. This is a one way ticket
Depending on which fare, and in which cabin you are traveling in, it is likely that you will be required to purchase a new ticket. You may be able to convince Air Canada to let you change the flight to one leaving later, but in this case there will be a penalty to pay, as well as the difference in fare, in which case it will probably be cheaper to buy a whole new ticket.
You have not mentioned that where you are flying from. I am assuming that you are flying from US. The cost of ticket depends on various factors like departure date, flying time & availability of tickets and many more. Then also you can search online travel portal like Globester.com to find out the best & cheap air fare deal.