How far is Osage Beach, MO from O'Fallon, MO?
Fastest route
The distance from Osage Beach, Missouri to O'Fallon, Missouri is approximately 145 miles (233 kilometers). The estimated travel time is about 2 hours and 10 minutes. The fastest route currently, considering traffic conditions, is via US-54 and I-70 E.
Directions
- Start your journey in Osage Beach, Missouri.
- Head northeast on Osage Beach Pkwy N.
- Use the left 2 lanes to turn left.
- Turn right to merge onto I-70 E/US-40 E toward St. Louis.
- Continue on I-70 E, following the signs for St. Louis.
- Take exit 217 for State Hwy K/Main St toward O'Fallon.
- Keep left at the fork to continue toward State Hwy K/Main St, then turn left onto State Hwy K/Main St.
Tips & Suggestions
- 🚗 Plan your trip during off-peak hours to avoid heavy traffic congestion.
- ⛽ Make sure to fuel up your vehicle before embarking on the journey.
- 📱 Use a GPS navigation app or map to stay on track and find the best routes.
- 🥪 Pack some snacks and drinks for the road to keep yourself refreshed.
- 🚧 Stay alert for any road construction or detours along the way.
- 📞 Have emergency contact numbers and a mobile phone charger readily available.
- 📝 Familiarize yourself with the traffic rules and regulations of the areas you'll be passing through.
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 16m.
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 and county seat of Callaway County, Missouri
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Osage Beach and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Osage Beach and O'Fallon.
-
1
Start on the route
25 m · 7 sec
-
2
Turn left
39 m · 13 sec
-
3
Turn left onto Winn Road
58 m · 12 sec · Winn Road
-
4
Turn right onto Osage Beach Parkway
2206 ft · 46 sec · Osage Beach Parkway
-
5
Merge slight left
20.4 mi · 22 min
-
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
-
8
Merge slight left onto Dwight D. Eisenhower Highway
69.2 mi · 1 hr 20 min · Dwight D. Eisenhower Highway
-
9
Take the exit slight right toward MO K: O'Fallon
1765 ft · 43 sec
-
10
Turn straight onto Drennen Parkway
46 m · 3 sec · Drennen Parkway
-
11
Keep slight right to continue on Drennen Parkway
51 m · 6 sec · Drennen Parkway
-
12
Turn slight left onto MO K: O'Fallon
19 m · 3 sec
-
13
Continue on South Main Street
3115 ft · 2 min · South Main Street
-
14
Turn right
8 m · 2 sec
-
15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Osage Beach 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.
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 Osage Beach 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 Osage Beach to O'Fallon?
The road trip is about 147.3 miles (237.1 km) and usually takes 02h 16m 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?
Fulton is a useful midpoint, sitting about 73.6 miles from Osage Beach and 73.8 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 115.6 miles (186.1 km), while the road route adds roughly 31.7 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 1:56 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.61 one way or $39.22 round trip. Estimated CO2 is about 46.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Osage Beach and Sunny near O'Fallon.
Stop Ideas Near Fulton
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 Fulton.
Jefferson City
Hermann
Washington
Sedalia
Flight Path Map
This map shows the direct air route between Osage Beach and O'Fallon. Straight-line distance: 115.65 mi (186.12 km).
#1 Osage Beach
City in Camden and Miller counties in the U.
| Population | 4,677 |
| Coordinates | 38.1295600, -92.6527700 |
| Altitude | 262 |
| 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: 237 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 54m |
| 40 mph (64.37 km/h) | 03h 41m |
| 50 mph (80.47 km/h) | 02h 56m |
| 60 mph (96.56 km/h) | 02h 27m |
| 70 mph (112.65 km/h) | 02h 06m |
| 80 mph (129 km/h) | 01h 50m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $19.61 | $39.22 |
| Mid-grade | $4.25 | $22.12 | $44.23 |
| Premium | $4.65 | $24.20 | $48.40 |
| Diesel | $5.30 | $27.58 | $55.16 |
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 · May 25, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.