What provides the most comprehensive information on a given airport?

The Chart Supplement U.S. is the most comprehensive source of information about a given airport because it provides detailed information that includes not only the layout of the airport but also pertinent operational information. This includes communications frequencies, runway dimensions, airport services, special notices, and any other relevant information that might be important for pilots, including UAS remote pilots.

While the airport website can offer various details, it may not always include the extensive operational information that the Chart Supplement provides, especially for pilots. Sectional charts offer a visual representation of the airspace and some airport information, but they do not provide the same level of detailed information about the airports themselves as the Chart Supplement. Flight planning software can be very useful but is typically reliant on data from sources like the Chart Supplement, meaning it might not contain all the detailed operational information found in the Chart Supplement itself. Thus, the Chart Supplement U.S. is recognized as the most reliable and thorough source for a pilot seeking complete knowledge about an airport.