How far is Merrillville, IN from Lafayette, IN?
The driving distance from Merrillville, IN to Lafayette, IN is about 83.1 miles (133.7 km), with a travel time of about 01h 25m by car.
- The straight-line flight distance is about 77.4 miles (124.6 km).
- For a round trip, plan for roughly 02h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 01h 25m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Indiana
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Merrillville and Lafayette.
Turn-by-Turn Driving Directions
Step-by-step road directions between Merrillville and Lafayette.
-
1
Start on Indian Trail
1156 ft · 56 sec · Indian Trail
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2
At the end of the road, turn left onto Broadway
1.4 km · 2 min · Broadway
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3
Turn left onto East 81st Avenue
1798 ft · 42 sec · East 81st Avenue
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4
Take the ramp slight right toward I 65: Indianapolis, Chicago
122 m · 10 sec
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5
Keep slight right to continue on I 65 South: Indianapolis
2578 ft · 1 min
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6
Merge slight left onto Casimir Pulaski Memorial Highway
76.9 mi · 1 hr 22 min · Casimir Pulaski Memorial Highway
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7
Take the exit slight right toward SR 25: Delphi, Lafayette
1911 ft · 44 sec
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8
Turn right onto Schuyler Avenue
1.9 mi · 3 min · Schuyler Avenue
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9
Turn left onto North 18th Street
1.6 mi · 4 min · North 18th Street
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10
Turn left onto South Street
151 m · 14 sec · South Street
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11
Turn right onto Grant Street
11 m · 2 sec · Grant Street
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12
Turn right onto Douglas Street
50 m · 13 sec · Douglas Street
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13
Turn left
56 m · 13 sec
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14
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Merrillville and Lafayette.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Casimir Pulaski Memorial Highway
Merge slight left onto Casimir Pulaski Memorial Highway
76.9 mi · 01h 22m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Merrillville and Mostly Sunny near Lafayette.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Merrillville to Lafayette?
The road trip is about 83.1 miles (133.7 km) and usually takes 01h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Rensselaer is a useful midpoint, sitting about 41.4 miles from Merrillville and 41.6 miles from Lafayette.
How much longer is the road route than the straight-line distance?
The direct path is about 77.4 miles (124.6 km), while the road route adds roughly 5.7 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 3:40 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.05 one way or $22.10 round trip. Estimated CO2 is about 26 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Merrillville and Lafayette, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Sunny around Merrillville and Mostly Sunny near Lafayette.
Stop Ideas Near Rensselaer
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Rensselaer.
Rensselaer
Lafayette station
Kankakee
Dyer station
Flight Path Map
This map shows the direct air route between Merrillville and Lafayette. Straight-line distance: 77.44 mi (124.62 km).
#1 Merrillville
Town in Ross Township, Lake County, Indiana
| Population | 34,916 |
| Coordinates | 41.4828100, -87.3328100 |
| Altitude | 200 |
| Country | United States |
#2 Lafayette
The most populous city in Tippecanoe County, Indiana.
| Population | 71,484 |
| Coordinates | 40.4167000, -86.8752900 |
| Altitude | 211 |
| Country | United States |
End: (-86.875433, 40.416605)
Estimated Travel Time
Distance: 134 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 46m |
| 40 mph (64.37 km/h) | 02h 04m |
| 50 mph (80.47 km/h) | 01h 39m |
| 60 mph (96.56 km/h) | 01h 23m |
| 70 mph (112.65 km/h) | 01h 11m |
| 80 mph (129 km/h) | 01h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $11.05 | $22.10 |
| Mid-grade | $4.25 | $12.46 | $24.92 |
| Premium | $4.65 | $13.64 | $27.27 |
| Diesel | $5.30 | $15.54 | $31.08 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Indiana · May 26, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.