How far is Terre du Lac, MO from O'Fallon, MO?
The driving distance from Terre du Lac, MO to O'Fallon, MO is about 88.2 miles (142 km), with a travel time of about 01h 32m by car.
- The straight-line flight distance is about 62.3 miles (100.2 km).
- For a round trip, plan for roughly 03h 05m 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 32m.
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 Jefferson County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Terre du Lac and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Terre du Lac and O'Fallon.
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1
Start on Michel Drive
33 m · 12 sec · Michel Drive
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2
Continue on Michel Drive
110 m · 19 sec · Michel Drive
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3
Turn left onto Rue Monshau
748 ft · 36 sec · Rue Monshau
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4
Turn right onto Champs Elysees Drive
38 m · 10 sec · Champs Elysees Drive
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5
Turn left onto Dominique Drive
36 m · 11 sec · Dominique Drive
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6
Turn left onto Champs Elysees Drive
1273 ft · 57 sec · Champs Elysees Drive
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7
Turn right onto Saint Francois Road
1373 ft · 1 min · Saint Francois Road
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8
Turn left onto Rue Charlemagne
112 m · 18 sec · Rue Charlemagne
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9
Turn right onto Rue Terre Bonne
3041 ft · 2 min · Rue Terre Bonne
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10
Continue on Rue Terre Bonne
2463 ft · 2 min · Rue Terre Bonne
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11
At the end of the road, turn right
4.8 mi · 9 min
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12
Take the ramp left toward US 67 North: Saint Louis
838 ft · 20 sec
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13
Merge slight left
22.7 mi · 26 min
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14
Keep slight right
1750 ft · 27 sec
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15
Take the exit straight toward I 55 North: Saint Louis
1735 ft · 49 sec
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16
Merge slight left
20.5 mi · 22 min
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17
Continue on Rosa Parks Highway
1.3 mi · 2 min · Rosa Parks Highway
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18
Take the exit slight right toward I 270 West, I 255 East: Kansas City, Chicago
1279 ft · 27 sec
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19
Keep slight left to continue on I 270 West: Kansas City
118 m · 8 sec
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20
Continue on I 270 West
1.2 km · 1 min
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21
Merge slight left
18.1 mi · 23 min
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22
Take the exit slight right toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
1 mi · 1 min
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23
Keep slight left to continue on I 70 West: Kansas City
645 ft · 11 sec
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24
Continue on I 70 West: Kansas City
1 km · 57 sec
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25
Merge slight left
13.6 mi · 17 min
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26
Take the exit slight right toward MO K: O'Fallon, Main Street
119 m · 8 sec
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27
Turn straight onto East Terra Lane
1.4 km · 2 min · East Terra Lane
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28
Turn right onto South Main Street
2830 ft · 1 min · South Main Street
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29
Turn right
8 m · 2 sec
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30
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Terre du Lac and O'Fallon.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US 67 North
Merge slight left
22.7 mi · 00h 26m
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.
Showers And Thunderstorms leaving Terre du Lac and Chance Showers And Thunderstorms near O'Fallon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Terre du Lac to O'Fallon?
The road trip is about 88.2 miles (142 km) and usually takes 01h 32m 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?
Kimmswick is a useful midpoint, sitting about 44.1 miles from Terre du Lac and 44.1 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 62.3 miles (100.2 km), while the road route adds roughly 25.9 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 3:24 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.36 one way or $24.72 round trip. Estimated CO2 is about 27.6 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Terre du Lac and Chance Showers And Thunderstorms near O'Fallon.
Stop Ideas Near Kimmswick
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 Kimmswick.
Kirkwood
Gateway Transportation Center
Washington
Alton
Flight Path Map
This map shows the direct air route between Terre du Lac and O'Fallon. Straight-line distance: 62.24 mi (100.16 km).
#1 Terre du Lac
Terre du Lac is a place in Missouri, United States.
| Population | 0 |
| Coordinates | 37.9117200, -90.6254100 |
| Altitude | 297 |
| Country | United States |
#2 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
End: (-90.699849, 38.810674)
Estimated Travel Time
Distance: 142 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 56m |
| 40 mph (64.37 km/h) | 02h 12m |
| 50 mph (80.47 km/h) | 01h 45m |
| 60 mph (96.56 km/h) | 01h 28m |
| 70 mph (112.65 km/h) | 01h 15m |
| 80 mph (129 km/h) | 01h 06m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.98 | $12.36 | $24.72 |
| Mid-grade | $4.34 | $13.50 | $27.00 |
| Premium | $4.71 | $14.64 | $29.28 |
| Diesel | $5.99 | $18.62 | $37.25 |
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 Missouri · Oct 15, 2026