New York → District of Columbia · Interstate 90 (New York State Thruway)
Heading out from Buffalo, New York, toward Washington, District of Columbia, the driver covers roughly 553 km (344 miles) primarily on Interstate 90 (New York State Thruway), spending around 5h 16m between origin and destination outside peak hours. Departing from Buffalo, the western New York gateway to the Niagara Frontier and Lake Erie, the route traverses areas with distinct economic profiles before reaching Washington, the capital of the United States and seat of the federal government. 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 50.3 liters of regular unleaded at 0.92 USD/liter — runs about $46.28. Applying the IRS standard mileage rate (2025) reimbursement rate of $0.43/km produces a one-way reimbursement of $237.79. 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.