How far is O'Fallon, MO from Marionville, MO?
The driving distance from O'Fallon, MO to Marionville, MO is about 236.2 miles (380.2 km), with a travel time of about 04h 41m by car.
- The straight-line flight distance is about 203.1 miles (326.8 km).
- For a round trip, plan for roughly 09h 22m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 04h 41m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Phelps County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between O'Fallon and Marionville.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Marionville.
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1
Start on the route
8 m · 7 sec
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2
Turn left onto South Main Street
2865 ft · 1 min · South Main Street
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3
Continue straight
3.1 mi · 6 min
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4
Continue straight
3.4 mi · 5 min
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5
Take the ramp slight right toward I 64 East, US 40 East, US 61 South
1523 ft · 22 sec
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6
Merge slight left onto Avenue of the Saints
3.7 mi · 5 min · Avenue of the Saints
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7
Take the exit slight right toward Chesterfield Airport Road
2700 ft · 58 sec
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8
Continue on Chesterfield Airport Road
110 m · 7 sec · Chesterfield Airport Road
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9
Turn right onto Olive Street Road
64 m · 5 sec
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10
Turn right onto Olive Street Road
1.5 km · 2 min · Olive Street Road
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11
Continue on North Eatherton Road
2.4 mi · 5 min · North Eatherton Road
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12
Enter the roundabout and take exit 2 toward the route
21 m · 1 sec
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13
Exit the roundabout
4.3 mi · 7 min
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14
Enter the roundabout and take exit 2 toward the route
29 m · 2 sec
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15
Exit the roundabout
2098 ft · 45 sec
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16
Enter the roundabout and take exit 2 toward MO 100 West: Gray Summit
23 m · 2 sec
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17
Exit the roundabout onto MO 100 West: Gray Summit
1202 ft · 33 sec
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18
Merge slight left
13.3 mi · 19 min
-
19
Take the exit slight right toward I 44 West, US 50 West: St. Clair
1157 ft · 14 sec
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20
Merge slight left
182.8 mi · 3 hr 18 min
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21
Take the exit slight right toward MO MM, MO B
1040 ft · 30 sec
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22
Turn left
3.9 mi · 6 min
-
23
Continue straight
96 m · 11 sec
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24
Turn straight
9 mi · 14 min
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25
Continue on Southwest Elm Street
1.2 mi · 2 min · Southwest Elm Street
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26
Continue straight
4.9 mi · 7 min
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27
Turn right
1762 ft · 41 sec
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28
Turn left onto East Lincoln Street
1851 ft · 51 sec · East Lincoln Street
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29
Arrive at your destination
0 m · 1 sec · West Lincoln Street
Car Route Details
A richer read on the saved driving route between O'Fallon and Marionville.
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 44 West
Merge slight left
183 mi · 03h 18m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny then Chance Showers And Thunderstorms leaving O'Fallon and Slight Chance Showers And Thunderstorms near Marionville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Marionville?
The road trip is about 236.2 miles (380.2 km) and usually takes 04h 41m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Newburg is a useful midpoint, sitting about 118 miles from O'Fallon and 118.2 miles from Marionville.
How much longer is the road route than the straight-line distance?
The direct path is about 203.1 miles (326.8 km), while the road route adds roughly 33.1 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 7:38 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $31.41 one way or $62.82 round trip. Estimated CO2 is about 74 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Chance Showers And Thunderstorms around O'Fallon and Slight Chance Showers And Thunderstorms near Marionville.
Stop Ideas Near Newburg
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 Newburg.
Jefferson City
Hermann
Washington
Flight Path Map
This map shows the direct air route between O'Fallon and Marionville. Straight-line distance: 203.06 mi (326.8 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 Marionville
City in Lawrence County, Missouri, United States
| Population | 2,164 |
| Coordinates | 37.0031100, -93.6374200 |
| Altitude | 416 |
| Country | United States |
End: Marionville (-93.63742, 37.00311)
Estimated Travel Time
Distance: 380 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 52m |
| 40 mph (64.37 km/h) | 05h 54m |
| 50 mph (80.47 km/h) | 04h 43m |
| 60 mph (96.56 km/h) | 03h 56m |
| 70 mph (112.65 km/h) | 03h 22m |
| 80 mph (129 km/h) | 02h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $31.41 | $62.82 |
| Mid-grade | $4.25 | $35.43 | $70.85 |
| Premium | $4.65 | $38.77 | $77.54 |
| Diesel | $5.30 | $44.18 | $88.36 |
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 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.