hi i got a premium ticket to narita internationational and i need book to bangkok, somebody can help me about the better way or the cheapest airline to go
thanz

The cheapest may not be from Narita. If you're willing to change airports try

http://www.airasia.com/ot/en/home.page

Air Asia does not fly direct to Bangkok from Japan and you will have to fly to Malaysia first and re-checkin with your luggage and boarding pass before flying to Bangkok. You are almost doubling your travel time vs flying direct.

However, if you are looking for a one way ticket then they might be the cheapest.

The least expensive fares seem to be on China Eastern (change planes in Shanghai) or Vietnam Airlines (change in either Hanoi or HCM City).

tHANKS TO ALL OF YOU, I WILL CHECK YOUR SUGGESTIONS

You didn't say if your trip would be 1 way or RT. If it is RT you may find a cheaper option on any of a number of airlines, including the one you're using to fly into Narita. It's hard to advise you without knowing that or the dates.

Look here to compare: http://matrix.itasoftware.com/