IMHO cant beat the Novotel at the airport.. Free shuttle and dinner buffett is always very good..
THB400+tolls with the meter on should get one to Silom and back to the airport!Frankly, you should not care.... Taxi fares in Bangkok are regulated and are uniform to either the Silom or other areas. I believe the cost 400 Bahts + tolls, which you are to pay and since the majority of the travel is on the magnificent motorway the difference in travel to any hotel area is miniscule.
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