How far is O'Fallon, MO from Oregon County, MO?
The driving distance from O'Fallon, MO to Oregon County, MO is about 201.8 miles (324.7 km), with a travel time of about 04h 41m by car.
- The straight-line flight distance is about 151.7 miles (244.1 km).
- For a round trip, plan for roughly 09h 23m 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.
Showers And Thunderstorms
Slight Chance Showers And Thunderstorms then Mostly Sunny
Driving Route Map
The map below follows the saved road route between O'Fallon and Oregon County.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Oregon County.
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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
57.4 mi · 1 hr 1 min
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21
Take the exit slight right toward MO 8, MO 68: Saint James
710 ft · 18 sec
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22
Turn left onto North Jefferson Street
4.8 mi · 7 min · North Jefferson Street
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23
Turn right
22.3 mi · 39 min
-
24
Continue straight
55.9 mi · 1 hr 18 min
-
25
Turn right
1.3 km · 1 min
-
26
Turn left
25.9 mi · 38 min
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27
Turn left
1 km · 58 sec
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28
Continue on Tucker Creek Road
2584 ft · 2 min · Tucker Creek Road
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29
Arrive at your destination
0 m · 1 sec · Tucker Creek Road
Car Route Details
A richer read on the saved driving route between O'Fallon and Oregon County.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
I 44 West
Merge slight left
57.4 mi · 01h 01m
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.
Showers And Thunderstorms leaving O'Fallon and Slight Chance Showers And Thunderstorms then Mostly Sunny near Oregon County.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Oregon County?
The road trip is about 201.8 miles (324.7 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?
Saint James is a useful midpoint, sitting about 100.9 miles from O'Fallon and 100.8 miles from Oregon County.
How much longer is the road route than the straight-line distance?
The direct path is about 151.7 miles (244.1 km), while the road route adds roughly 50.1 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 7:36 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.30 one way or $56.60 round trip. Estimated CO2 is about 63.3 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around O'Fallon and Slight Chance Showers And Thunderstorms then Mostly Sunny near Oregon County.
Stop Ideas Near Saint James
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 Saint James.
Jefferson City
Hermann
Washington
Flight Path Map
This map shows the direct air route between O'Fallon and Oregon County. Straight-line distance: 151.7 mi (244.13 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 Oregon County
County in Missouri, United States
| Population | 10,411 |
| Coordinates | 36.6867200, -91.4032900 |
| Altitude | 240 |
| Country | United States |
End: Oregon County (-91.40329, 36.68672)
Estimated Travel Time
Distance: 325 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 43m |
| 40 mph (64.37 km/h) | 05h 02m |
| 50 mph (80.47 km/h) | 04h 02m |
| 60 mph (96.56 km/h) | 03h 21m |
| 70 mph (112.65 km/h) | 02h 52m |
| 80 mph (129 km/h) | 02h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.98 | $28.30 | $56.60 |
| Mid-grade | $4.34 | $30.91 | $61.82 |
| Premium | $4.71 | $33.51 | $67.03 |
| Diesel | $5.99 | $42.63 | $85.27 |
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