Flathead Lake is about 19,281 times smaller than United States.

United States is approximately 9,833,517 sq km, while Flathead Lake is approximately 510 km² (197 sq mi), making Flathead Lake 0.01% the size of United States.
Tip: This to-scale comparison of United States vs. Flathead Lake uses the Mercator projection, which distorts the size of regions near the poles.
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