Houston is 1 hour ahead of Denver. Houston uses Central Time (CT). Denver uses Mountain Time (MT). Both observe daylight saving time.
When it's 12:00 PM in Houston, it's 11:00 AM in Denver.
Most hours work! With only a 1 hour difference, business hours overlap almost entirely.
Houston and Denver are both major US energy industry hubs. United Airlines operates frequent direct flights taking about 2.5 hours.