How far is Saint John, IN from Merrillville, IN?
The driving distance from Saint John, IN to Merrillville, IN is about 296 miles (476.4 km), with a travel time of about 05h 32m by car.
- The straight-line flight distance is about 235.3 miles (378.6 km).
- For a round trip, plan for roughly 11h 05m 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 05h 32m.
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.
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Sunny
Driving Route Map
The map below follows the saved road route between Saint John and Merrillville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint John and Merrillville.
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1
Start on St John Road
1.1 mi · 4 min · St John Road
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2
At the end of the road, turn left onto New Harmony Road
1.4 mi · 3 min · New Harmony Road
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3
Continue on East Boonville New Harmony Road
750 ft · 21 sec · East Boonville New Harmony Road
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4
Take the ramp right
1524 ft · 37 sec
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5
Merge slight left
146.5 mi · 2 hr 39 min
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6
Take the exit slight left toward I 465 West, I 74 West: Peoria
1.4 mi · 3 min
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7
Merge slight left
9.2 mi · 11 min
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8
Keep slight left
3.9 mi · 5 min
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9
Take the exit slight left toward I 65 North: Chicago
1.1 mi · 2 min
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10
Merge slight right
17.9 mi · 20 min
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11
Take the exit slight right toward US 52 West
1281 ft · 16 sec
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12
Keep slight left
786 ft · 10 sec
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13
Merge slight left
110.4 mi · 1 hr 59 min
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14
Take the exit slight right toward US 30: Merrillville, Hobart, Valparaiso
1618 ft · 40 sec
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15
Keep slight left to continue on US 30: Merrillville, Hobart, Valparaiso, VA Clinic
138 m · 15 sec
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16
Turn left onto US 30: Merrillville, Hobart, Valparaiso
33 m · 4 sec
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17
Turn left onto East 81st Avenue
1.1 km · 1 min · East 81st Avenue
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18
Turn right onto Broadway
1.4 km · 2 min · Broadway
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19
Turn right onto Indian Trail
1156 ft · 51 sec · Indian Trail
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20
Arrive at your destination
0 m · 1 sec · Indian Trail
Car Route Details
A richer read on the saved driving route between Saint John and Merrillville.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
East Boonville New Harmony Road
Merge slight left
146 mi · 02h 39m
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.
Slight Chance Rain Showers then Chance Showers And Thunderstorms leaving Saint John and Sunny near Merrillville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint John to Merrillville?
The road trip is about 296 miles (476.4 km) and usually takes 05h 32m 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 148 miles from Saint John and 147.9 miles from Merrillville.
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 60.7 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 5:54 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $39.41 one way or $78.81 round trip. Estimated CO2 is about 92.9 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers then Chance Showers And Thunderstorms around Saint John and Sunny near Merrillville.
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 Saint John and Merrillville. Straight-line distance: 235.25 mi (378.6 km).
#1 Saint John
Town in Indiana, United States
| Population | 19,616 |
| Coordinates | 38.0792100, -87.4500100 |
| Altitude | 131 |
| Country | United States |
#2 Merrillville
Town in Ross Township, Lake County, Indiana
| Population | 34,916 |
| Coordinates | 41.4828100, -87.3328100 |
| Altitude | 200 |
| Country | United States |
End: Merrillville (-87.33281, 41.48281)
Estimated Travel Time
Distance: 476 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 51m |
| 40 mph (64.37 km/h) | 07h 24m |
| 50 mph (80.47 km/h) | 05h 55m |
| 60 mph (96.56 km/h) | 04h 55m |
| 70 mph (112.65 km/h) | 04h 13m |
| 80 mph (129 km/h) | 03h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $39.41 | $78.81 |
| Mid-grade | $4.25 | $44.44 | $88.89 |
| Premium | $4.65 | $48.63 | $97.27 |
| Diesel | $5.30 | $55.43 | $110.85 |
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.