What airline offers the cheapest flights to Vancouver International from any UK airport?

I need a flight from the start of December, returning at the start of March. I am looking for the cheapest airline, any suggestions would be helpful?

Thanks

Air Transat. http://www.airtransat.com

They fly from Vancouver to London Gatwick, Glasgow International and Manchester from just £200.

Please check:

Tips:

a- use flexible dates

b- use alternative airports

http://www.hotwire.com/

http://www.cheapoair.com/

http://www.kayak.com/

http://www.orbitz.com/

http://www.priceline.com/

http://www.expedia.com/default.asp

http://www.farecompare.com/

http://www.farecast.com/

http://www.airfarewatchdog.com/

http://www.cheapair.com/

well there's Lee's Travel. but British Airways has flights about the same price.