And there are an abundance of natural gas pipelines in the US for internal gas delivery:
https://www.eia.gov/energyexplained/natural-gas/natural-gas-pipelines.php

How did this transmission and distribution network become so large?
About half of the existing mainline natural gas transmission network and a large portion of the local distribution network were installed in the 1950s and 1960s because consumer demand for natural gas more than doubled following World War II. The distribution network has continued to expand to provide natural gas service to new commercial facilities and housing developments.

Natural gas prices increased substantially between 2003 and 2008. Higher prices gave natural gas producers an incentive to expand development of existing fields and to begin exploration of previously undeveloped natural gas fields. Advances in drilling and production techniques led to increases in production from shale and other tight geologic formations. These increases in production contributed to general declines in natural gas prices since 2009, which in turn contributed to increases in demand for natural gas for electricity generation and by industry. Consequently, new transmission pipelines were constructed and others are being built to link the expanded and new production sources to more consumers around the country, most notably in the Northeast.