Mammoth Cave to Merrillville: Road Trip Guide & Distance

How far is Mammoth Cave from Merrillville?

The distance from Mammoth Cave to Merrillville is 304.1 miles (489.4 km) as the crow flies. Merrillville is located NNW of Mammoth Cave. By car, the driving distance is approximately 380.2 miles, taking about 7h 39min. A direct flight would take roughly 1h 7min. Both are located in United States — Mammoth Cave in Kentucky and Merrillville in Indiana.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare.

Coordinates come from public place data for Mammoth Cave and Merrillville. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.