The data shown here comes from Flight Delay Analysis Dataset

This chart is a combination of two view/charts - One is a map of the United States showing the "Major U.S. Airports based on Departure Delay" and another is a histogram showing the "Total Departure Delay for every hour of the day".

We combine both these charts to show the "Major U.S. Airports based on Departure Delay grouped by time of day and it includes brushing". The color saturation denotes the total Departure Delay at that airport. The names of the cities are shown on the tooltip when you hover over those data points on the map.

I used the U.S. Geo Map of State Boundaries for the underlying map.

Adapted from Largest Cities by population in 2020 & Fatal Police Shootings Mapped Across the U.S. & Mass School District Boundaries from the Data Visualization class.

The intent of this graph is to map each flight to it's destination location(within the U.S.),grouped by time of the day with a semitransparent circle to show darker regions as the airports with higher flight departure delay density.

An additional feature that could be added to this chart is the zooming functionality to show the major airports of those states/cities.