FAA Aeronautical Charts
Above shows the index for the Sectional Aeronautical Charts with the more detailed Terminal Area Charts shown in purple for the big city Class B airports.
Aeronautical charts can be found at most airports and pilot shops locally click here for agents near you.
If you want to order on line just search the web for “buy FAA Sectional Aeronautical Chart”.
A popular way to view the charts on line is with SkyVector.
Searching the web for “FAA Aeronautical Charts” will provide a number of resources for paper and on line resources.