How far is Merrillville, IN from Saint John, IN?
The driving distance from Merrillville, IN to Saint John, IN is about 263.8 miles (424.6 km), with a travel time of about 04h 34m by car.
- The straight-line flight distance is about 235.3 miles (378.6 km).
- For a round trip, plan for roughly 09h 09m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 04h 34m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Included town in Indianapolis
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Merrillville and Saint John.
Turn-by-Turn Driving Directions
Step-by-step road directions between Merrillville and Saint John.
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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
122.9 mi · 2 hr 12 min · Casimir Pulaski Memorial Highway
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7
Keep slight left
5.9 mi · 7 min
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8
Take the exit slight right toward I 465 South
1210 ft · 30 sec
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9
Continue on I 465 South
1 km · 1 min
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10
Merge slight left
13.7 mi · 16 min
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11
Take the exit slight right toward I 69 South: Evansville
1.3 km · 2 min
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12
Continue straight
47.5 mi · 53 min
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13
Keep slight left to continue on I 69 South: Evansville
99 mi · 1 hr 46 min
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14
Take the exit slight right toward Boonville-New Harmony Road
1764 ft · 43 sec
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15
Turn left onto East Boonville New Harmony Road
1532 ft · 42 sec · East Boonville New Harmony Road
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16
Continue on New Harmony Road
1.4 mi · 3 min · New Harmony Road
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17
Turn right onto St John Road
1.1 mi · 4 min · St John Road
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18
Arrive at your destination
0 m · 1 sec · St John Road
Car Route Details
A richer read on the saved driving route between Merrillville and Saint John.
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
123 mi · 02h 12m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Merrillville and Slight Chance Rain Showers then Chance Showers And Thunderstorms near Saint John.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Merrillville to Saint John?
The road trip is about 263.8 miles (424.6 km) and usually takes 04h 34m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Homecroft is a useful midpoint, sitting about 147.9 miles from Merrillville and 115.9 miles from Saint John.
How much longer is the road route than the straight-line distance?
The direct path is about 235.3 miles (378.6 km), while the road route adds roughly 28.5 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 7:50 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $35.11 one way or $70.22 round trip. Estimated CO2 is about 82.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Merrillville and Slight Chance Rain Showers then Chance Showers And Thunderstorms near Saint John.
Stop Ideas Near Homecroft
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Avon Town Hall Park
Whiteland Town Hall
City Centre
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Homecroft.
Indianapolis Union Station
Crawfordsville
Crawfordsville (Bus), Indiana
Connersville station
Flight Path Map
This map shows the direct air route between Merrillville and Saint John. Straight-line distance: 235.25 mi (378.6 km).
#1 Merrillville
Town in Ross Township, Lake County, Indiana
| Population | 34,916 |
| Coordinates | 41.4828100, -87.3328100 |
| Altitude | 200 |
| Country | United States |
#2 Saint John
Town in Indiana, United States
| Population | 19,616 |
| Coordinates | 38.0792100, -87.4500100 |
| Altitude | 131 |
| Country | United States |
End: St John Road (-87.44975, 38.079207)
Estimated Travel Time
Distance: 425 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 47m |
| 40 mph (64.37 km/h) | 06h 35m |
| 50 mph (80.47 km/h) | 05h 16m |
| 60 mph (96.56 km/h) | 04h 23m |
| 70 mph (112.65 km/h) | 03h 46m |
| 80 mph (129 km/h) | 03h 17m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $35.11 | $70.22 |
| Mid-grade | $4.25 | $39.60 | $79.19 |
| Premium | $4.65 | $43.33 | $86.66 |
| Diesel | $5.30 | $49.38 | $98.76 |
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.