How far is Lake Ozark, MO from O'Fallon, MO?
The driving distance from Lake Ozark, MO to O'Fallon, MO is about 141.7 miles (228 km), with a travel time of about 02h 13m by car.
- The straight-line flight distance is about 113 miles (181.9 km).
- For a round trip, plan for roughly 04h 27m 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 02h 13m.
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.
Human settlement in Callaway County, Missouri, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Lake Ozark and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lake Ozark and O'Fallon.
-
1
Start on Bagnell Dam Boulevard
1.6 mi · 4 min · Bagnell Dam Boulevard
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2
Exit the roundabout onto Willmore Lane
952 ft · 19 sec · Willmore Lane
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3
Enter the roundabout and take exit 2 toward the route
70 m · 4 sec
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4
Exit the roundabout
684 ft · 19 sec
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5
Merge slight left
13.1 mi · 14 min
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6
Turn straight
56.1 mi · 1 hr 3 min
-
7
Take the exit slight right toward I 70 East, US 40 East: Saint Louis
1220 ft · 15 sec
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8
Merge slight left onto Dwight D. Eisenhower Highway
69.2 mi · 1 hr 20 min · Dwight D. Eisenhower Highway
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9
Take the exit slight right toward MO K: O'Fallon
1765 ft · 43 sec
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10
Turn straight onto Drennen Parkway
46 m · 3 sec · Drennen Parkway
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11
Keep slight right to continue on Drennen Parkway
51 m · 6 sec · Drennen Parkway
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12
Turn slight left onto MO K: O'Fallon
19 m · 3 sec
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13
Continue on South Main Street
3115 ft · 2 min · South Main Street
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14
Turn right
8 m · 2 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Lake Ozark and O'Fallon.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
69.2 mi · 01h 20m
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.
Sunny leaving Lake Ozark and Sunny near O'Fallon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lake Ozark to O'Fallon?
The road trip is about 141.7 miles (228 km) and usually takes 02h 13m 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?
Kingdom City is a useful midpoint, sitting about 70.7 miles from Lake Ozark and 70.9 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 113 miles (181.9 km), while the road route adds roughly 28.7 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 2:02 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $18.86 one way or $37.71 round trip. Estimated CO2 is about 44.4 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Lake Ozark and Sunny near O'Fallon.
Stop Ideas Near Kingdom City
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 Kingdom City.
Jefferson City
Hermann
Washington
Sedalia
Flight Path Map
This map shows the direct air route between Lake Ozark and O'Fallon. Straight-line distance: 113.04 mi (181.92 km).
#1 Lake Ozark
City in Miller County, Missouri, United States
| Population | 1,853 |
| Coordinates | 38.1986400, -92.6388000 |
| Altitude | 229 |
| 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: 228 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 43m |
| 40 mph (64.37 km/h) | 03h 32m |
| 50 mph (80.47 km/h) | 02h 49m |
| 60 mph (96.56 km/h) | 02h 21m |
| 70 mph (112.65 km/h) | 02h 01m |
| 80 mph (129 km/h) | 01h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $18.86 | $37.71 |
| Mid-grade | $4.25 | $21.27 | $42.53 |
| Premium | $4.65 | $23.27 | $46.54 |
| Diesel | $5.30 | $26.52 | $53.04 |
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 · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.