Historically, they've considered land borders with Canada and Mexico, coastlines on the Pacific, Atlantic, and Gulf of Mexico, as well as the Great Lakes and St. Lawrence Seaway to be the edges of the 100 mile "reasonable distance":

https://www.aclu.org/know-your-rights/border-zone

https://en.wikipedia.org/wiki/Border_search_exception

This page:

https://www.criminallegalnews.org/news/2025/jul/1/understand...

Is one of the few that includes international airports, but then they go on to use the "200 million Americans within 100 miles of a border" statistic that's only accurate if you're only counting the land, sea, and Great Lakes borders. Which is still insane.

If you add a 100 mile circle around every international airport, that's basically every major population center in the country.

Sounds like yet another absurd misrepresentation, let's see if anyone can call them on it.