How far is O'Fallon, MO from Terre du Lac, MO?
The driving distance from O'Fallon, MO to Terre du Lac, MO is about 87.1 miles (140.2 km), with a travel time of about 01h 53m by car.
- The straight-line flight distance is about 62.3 miles (100.2 km).
- For a round trip, plan for roughly 03h 46m 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 53m.
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.
Chance Showers And Thunderstorms
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between O'Fallon and Terre du Lac.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Terre du Lac.
-
1
Start on the route
8 m · 7 sec
-
2
Turn left onto South Main Street
3116 ft · 2 min · South Main Street
-
3
Turn left onto Drennen Parkway
1.4 km · 1 min · Drennen Parkway
-
4
Take the ramp slight left toward I 70 East: Saint Louis
133 m · 6 sec
-
5
Merge slight left
13.5 mi · 17 min
-
6
Take the exit slight right toward I 270: Chicago, Memphis
872 ft · 12 sec
-
7
Keep slight right to continue on I 270 South: Memphis
2339 ft · 33 sec
-
8
Continue on I 270 South: Memphis
723 ft · 10 sec
-
9
Merge slight left
19 mi · 24 min
-
10
Take the exit slight right toward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry Road
1911 ft · 27 sec
-
11
Keep slight right to continue on I 55 South: Memphis
2031 ft · 44 sec
-
12
Merge slight left onto Rosa Parks Highway
1.5 mi · 2 min · Rosa Parks Highway
-
13
Continue on Officer Thomas G. Smith, Jr. Memorial Highway
1.8 mi · 2 min · Officer Thomas G. Smith, Jr. Memorial Highway
-
14
Continue on Police Officer Steven Jarvis Memorial Highway
18.3 mi · 20 min · Police Officer Steven Jarvis Memorial Highway
-
15
Take the exit slight right toward US 67 South: Farmington, Poplar Bluff
914 ft · 20 sec
-
16
Keep slight left
729 ft · 18 sec
-
17
Enter the roundabout and take exit 1 toward the route
9 m · 1 sec
-
18
Exit the roundabout
22.8 mi · 26 min
-
19
Take the exit slight right toward MO K, MO 47: Bonne Terre, Terre Du Lac
700 ft · 19 sec
-
20
Turn right
3212 ft · 1 min
-
21
Turn slight left onto Park Avenue
1567 ft · 31 sec · Park Avenue
-
22
Continue on West School Street
3.8 mi · 7 min · West School Street
-
23
Turn left onto Rue Terre Bonne
2563 ft · 2 min · Rue Terre Bonne
-
24
At the end of the road, turn right onto Rue Terre Bonne
98 m · 14 sec · Rue Terre Bonne
-
25
Continue on Rue Terre Bonne
2709 ft · 2 min · Rue Terre Bonne
-
26
Turn left onto Rue Charlemagne
112 m · 19 sec · Rue Charlemagne
-
27
Turn right onto Saint Francois Road
1517 ft · 1 min · Saint Francois Road
-
28
Turn left onto Champs Elysees Drive
1246 ft · 56 sec · Champs Elysees Drive
-
29
Turn right onto Rue Monshau
748 ft · 34 sec · Rue Monshau
-
30
Turn right onto Michel Drive
110 m · 20 sec · Michel Drive
-
31
Continue on Michel Drive
33 m · 5 sec · Michel Drive
-
32
Arrive at your destination
0 m · 1 sec · Michel Drive
Car Route Details
A richer read on the saved driving route between O'Fallon and Terre du Lac.
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 South
Exit the roundabout
22.8 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.
Chance Showers And Thunderstorms leaving O'Fallon and Showers And Thunderstorms near Terre du Lac.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Terre du Lac?
The road trip is about 87.1 miles (140.2 km) and usually takes 01h 53m 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 43.6 miles from O'Fallon and 43.6 miles from Terre du Lac.
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 24.8 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 2:44 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.20 one way or $24.41 round trip. Estimated CO2 is about 27.3 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around O'Fallon and Showers And Thunderstorms near Terre du Lac.
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 O'Fallon and Terre du Lac. Straight-line distance: 62.24 mi (100.16 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 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 |
End: Terre du Lac (-90.62541, 37.91172)
Estimated Travel Time
Distance: 140 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 54m |
| 40 mph (64.37 km/h) | 02h 10m |
| 50 mph (80.47 km/h) | 01h 44m |
| 60 mph (96.56 km/h) | 01h 27m |
| 70 mph (112.65 km/h) | 01h 14m |
| 80 mph (129 km/h) | 01h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.98 | $12.20 | $24.41 |
| Mid-grade | $4.34 | $13.33 | $26.65 |
| Premium | $4.71 | $14.45 | $28.90 |
| Diesel | $5.99 | $18.38 | $36.77 |
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