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Colorado → Utah · Interstate 70 / Interstate 25
What does it actually cost to drive from Denver, Colorado, to Salt Lake City, Utah? The hard numbers: 704 km (437 miles) of pavement primarily along Interstate 70 / Interstate 25, 6h 42m behind the wheel, and roughly $58.88 in fuel alone — that is 64 liters (16.9 gallons) of regular unleaded at a 0.92 USD/liter benchmark. Anyone leaving Denver, the Mile-High City and economic center of the Rocky Mountain region, typically carries samples, signed proposals, or service equipment to deliver in Salt Lake City, the capital of Utah and the gateway to the Wasatch Range and the Great Basin, and aims to be home the same evening. It is worth confirming whether the haul fits inside your daily hours-of-service window or whether an overnight at a midpoint hotel makes more sense. Applying the IRS standard mileage rate (2025) mileage rate of $0.43/km ($0.69/mile), the gross outbound reimbursement settles at $302.72. Attach the visit purpose, client name, and plate number to the Clara receipt so the journal entry lands directly in the business-travel expense account.