The chart above shows the number of passengers that traveled by air for every square mile in each EU and US region.  The leading EU region has more than double the air passengers per square mile than the leading US region.

The chart above shows the number of passengers that traveled by air for every square mile in each US region.  The Northeast has almost twice as many air passengers per square mile than the next leading region.

The chart above shows the number of passengers that traveled by air for every square kilometer in each EU region.  The Eastern EU almost finally got a break and didn't finish last in one of these metrics but the Northern EU just barely squeaked by it.

The chart above shows the number of passengers that traveled by air for every square mile in each EU and US state.  No state in the EU or the US comes anywhere near the number of air passengers per square mile that Malta has.

The chart above shows the number of passengers that traveled by air for every square mile in each US state.  New Jersey has a huge lead over every other state.

The chart above shows the number of passengers that traveled by air for every square kilometer in each EU state.  Malta is in a class by itself.

The chart above shows the number of airports that have at least 15,000 annual passengers for every 10,000 square miles (25,900 square kilometers) in EU and US states.  In both the EU and the US, the smallest states have the most airports per square mile of land, no surprise there.

The map above shows the number of airports that serve at least 15,000 passengers per year for every 10,000 square miles in each US state.  Rhode Island has the most busy airports per square mile.

The map above shows the number of airports that serve at least 15,000 passengers per year for every 10,000 square kilometers in each EU state.  Malta has the most busy airports per square kilometer.

The chart above shows the miles of waterways per square mile of land in EU and US regions.  Two EU regions lead in waterway coverage and the leading EU region has more than double the waterway coverage of the leading US region.