Sears Tower Skydeck - 1353ft
One World Observatory - 1250ft
Empire State Observation Deck - 1250ft
30 Hudson Yards Edge - 1131ft
Both One WTC and 30 Hudson yards websites claim to have the highest observation decks in the Western Hemisphere and both are outright lies.
Hudson Yards says ...
Then in the next paragraph...
The only building taller than Sears in NYC is One WTC and they had to extend the height of its spire than originally planned because they were thirsty in finally claiming that title from Chicago.
Actually, Central Park Tower is taller than Sears and One WTC in terms of building height excluding the spires. If you count the spires (which to me is cheating), it moves to #3 after Sears.