How far is Lafayette, IN from Saint John, IN?
The driving distance from Lafayette, IN to Saint John, IN is about 86.4 miles (139.1 km), with a travel time of about 01h 43m by car.
- The straight-line flight distance is about 77.9 miles (125.3 km).
- For a round trip, plan for roughly 03h 27m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EST.
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 43m.
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.
Partly Sunny
Driving Route Map
The map below follows the saved road route between Lafayette and Saint John.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lafayette and Saint John.
-
1
Start on the route
56 m · 16 sec
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2
Turn right onto Douglas Street
50 m · 8 sec · Douglas Street
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3
Turn left onto Grant Street
11 m · 7 sec · Grant Street
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4
Turn left onto South Street
151 m · 16 sec · South Street
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5
Turn right onto North 18th Street
1.6 mi · 4 min · North 18th Street
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6
Turn right onto Schuyler Avenue
1.9 mi · 3 min · Schuyler Avenue
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7
Continue on Hoosier Heartland Highway
773 ft · 23 sec · Hoosier Heartland Highway
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8
Turn left onto I 65 North
1374 ft · 36 sec
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9
Merge slight left
71.4 mi · 1 hr 17 min
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10
Take the exit slight right toward US 231: Crown Point
2386 ft · 53 sec
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11
At the end of the road, turn left
2.9 mi · 5 min
-
12
Turn right onto South Main Street
122 m · 12 sec · South Main Street
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13
Turn left onto West Clark Street
90 m · 8 sec · West Clark Street
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14
Turn left onto North Court Street
73 m · 10 sec · North Court Street
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15
Turn right onto West 109th Avenue
5.5 mi · 9 min · West 109th Avenue
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16
Turn right onto Wicker Avenue
2 mi · 3 min · Wicker Avenue
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17
Turn right onto West 93rd Avenue
12 m · 1 sec · West 93rd Avenue
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18
Arrive at your destination
0 m · 1 sec · West 93rd Avenue
Car Route Details
A richer read on the saved driving route between Lafayette 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.
I 65 North
Merge slight left
71.4 mi · 01h 17m
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.
Partly Sunny leaving Lafayette and Partly Sunny near Saint John.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lafayette to Saint John?
The road trip is about 86.4 miles (139.1 km) and usually takes 01h 43m 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 43.2 miles from Lafayette and 43.2 miles from Saint John.
How much longer is the road route than the straight-line distance?
The direct path is about 77.9 miles (125.3 km), while the road route adds roughly 8.5 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 8:00 AM to 10:00 AM EST. If you want a more comfortable same-day return, try to leave by 3:02 PM EST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.33 one way or $22.67 round trip. Estimated CO2 is about 27.1 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Lafayette and Saint John, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Partly Sunny around Lafayette and Partly Sunny near Saint John.
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 Lafayette and Saint John. Straight-line distance: 77.85 mi (125.29 km).
#1 Lafayette
The most populous city in Tippecanoe County, Indiana.
| Population | 71,484 |
| Coordinates | 40.4167000, -86.8752900 |
| Altitude | 211 |
| Country | United States |
#2 Saint John
Saint John is a place in Indiana, United States.
| Population | 0 |
| Coordinates | 41.4500400, -87.4700400 |
| Altitude | 221 |
| Country | United States |
End: Saint John (-87.47004, 41.45004)
Estimated Travel Time
Distance: 139 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 52m |
| 40 mph (64.37 km/h) | 02h 09m |
| 50 mph (80.47 km/h) | 01h 43m |
| 60 mph (96.56 km/h) | 01h 26m |
| 70 mph (112.65 km/h) | 01h 14m |
| 80 mph (129 km/h) | 01h 04m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.72 | $11.33 | $22.67 |
| Mid-grade | $4.32 | $13.19 | $26.37 |
| Premium | $4.85 | $14.78 | $29.56 |
| Diesel | $6.71 | $20.47 | $40.94 |
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 · Nov 06, 2026