tsuwm: my home [Minneapolis] is say 1100 air miles to NYC

1023 miles from NYC, tsuwm, but only 938 miles from Baltimore.

This would still give tsuwm the USA title over TEd in Denver. Though TEd is farther from San Francisco (963 miles), his outlet in Galveston, Texas, on the Gulf of Mexico (922 miles) is just a bit closer than tsuwm's 938.

As jazzo notes, James Bay (at the southern tip of Hudson Bay) would knock tswum out of the running, if it counts.

[Figures from http://www.indo.com/distance]