The footprint of the sonic boom is sizeable so there aren't many rural-enough areas on direct routes between candidate cities (slaloming along quiet corridors w

The footprint of the sonic boom is sizeable so there aren't many rural-enough areas on direct routes between candidate cities (slaloming along quiet corridors would cancel the speed advantage). So supersonic was largely restricted to trans-oceanic, which coupled with the range limitations mostly meant trans-Atlantic: New York to Paris or London.