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Texas → Louisiana · Interstate 45 (Gulf Freeway)
Heading out from Houston, Texas, toward New Orleans, Louisiana, the driver covers roughly 603 km (375 miles) primarily on Interstate 45 (Gulf Freeway), spending around 5h 45m between origin and destination outside peak hours. Departing from Houston, the fourth-largest US city and energy capital of the world, the route traverses areas with distinct economic profiles before reaching New Orleans, the Mississippi River delta port and the birthplace of jazz music. Trip planning should always include checking road conditions, toll plazas, active work zones, and the regional weather forecast — winter storms, holiday weekends and summer construction can each extend the schedule meaningfully. Estimated fuel cost — based on 54.8 liters of regular unleaded at 0.92 USD/liter — runs about $50.42. Applying the IRS standard mileage rate (2025) reimbursement rate of $0.43/km produces a one-way reimbursement of $259.29. Use the calculator below to issue a formal receipt capturing origin, destination, date, business purpose, and total — ready to submit to finance or export to Clara.