What airline should I buy ticket to fly to UK from Bangkok?

I am making my mine that which airline I should fly from Bangkok to London, with reasonable price. Transit one is ok. Anybody can suggest me?

British Airways and Qantas are cheapest currently, at 42,460 THB return. Both operate nonstop flights between BKK and LHR.

Here's a list of airlines and fares to Bangkok from London:

http://www.airfaresflights.co.uk/flights-to/Bangkok.htm

Air France http://theclickinfo.com/airline_tickets.ws