NOVOTEL BANGKOK ON SIAM SQUARE. . Suvarnabhumi airport is located 40 km east of Novotel Bangkok on Siam Square.From the Airport, take the Bangna Trat highway and follow signs to Bangkok, then take the Bangna To Din Daeng expressway and take exit Rama 4. Turn right onto Henry Dunant roadan d then left onto Siam Square. The hotel is on left hand side.