How far is O'Fallon, MO from Weston, MO?
The driving distance from O'Fallon, MO to Weston, MO is about 252 miles (405.6 km), with a travel time of about 04h 49m by car.
- The straight-line flight distance is about 229 miles (368.6 km).
- For a round trip, plan for roughly 09h 39m 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 49m.
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 Cooper County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between O'Fallon and Weston.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Weston.
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1
Start on the route
8 m · 7 sec
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2
Turn left onto South Main Street
3116 ft · 2 min · South Main Street
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3
Turn left onto I 70 East
10 m · 6 sec
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4
Turn sharp left onto South Main Street
87 m · 11 sec · South Main Street
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5
Turn left onto West Terra Lane
576 ft · 12 sec · West Terra Lane
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6
Take the ramp straight toward I 70 West
146 m · 7 sec
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7
Merge slight left
200.7 mi · 3 hr 46 min
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8
Continue on Truman/Eisenhower Presidential Highway
2.7 mi · 3 min · Truman/Eisenhower Presidential Highway
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9
Continue on Clifton J. Scott Memorial Highway
1.8 mi · 2 min · Clifton J. Scott Memorial Highway
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10
Continue on Truman/Eisenhower Presidential Highway
2.9 mi · 3 min · Truman/Eisenhower Presidential Highway
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11
Continue on George Brett Super Highway
1.4 km · 58 sec · George Brett Super Highway
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12
Take the exit slight right toward I 435 North, US 24 East: Des Moines
1.1 mi · 2 min
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13
Merge slight left onto Lamar Hunt Memorial Highway
7.8 mi · 9 min · Lamar Hunt Memorial Highway
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14
Continue on I435 N
1.3 mi · 1 min · I435 N
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15
Continue straight
20.9 mi · 22 min
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16
Keep slight left to continue on I 29 North, US 71 North: Saint Joseph
3.8 mi · 4 min
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17
Take the exit slight right toward MO 273 North: Tracy, Weston
1227 ft · 26 sec
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18
Turn left onto 273 Highway
1.1 km · 1 min · 273 Highway
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19
Continue on 273 Highway
4 mi · 5 min · 273 Highway
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20
Continue on JJ Highway
1.5 mi · 2 min · JJ Highway
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21
Continue on Walnut Street
1.2 km · 2 min · Walnut Street
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22
At the end of the road, turn left onto Main Street
1037 ft · 43 sec · Main Street
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23
Turn left onto Thomas Street
10 m · 1 sec · Thomas Street
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24
Arrive at your destination
0 m · 1 sec · Thomas Street
Car Route Details
A richer read on the saved driving route between O'Fallon and Weston.
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 70 West
Merge slight left
201 mi · 03h 46m
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 leaving O'Fallon and Showers And Thunderstorms Likely near Weston.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Weston?
The road trip is about 252 miles (405.6 km) and usually takes 04h 49m 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?
Blackwater is a useful midpoint, sitting about 125.8 miles from O'Fallon and 126.3 miles from Weston.
How much longer is the road route than the straight-line distance?
The direct path is about 229 miles (368.6 km), while the road route adds roughly 23 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 7:20 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.52 one way or $67.05 round trip. Estimated CO2 is about 79 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around O'Fallon and Showers And Thunderstorms Likely near Weston.
Stop Ideas Near Blackwater
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 Blackwater.
Sedalia
Warrensburg
Jefferson City
Flight Path Map
This map shows the direct air route between O'Fallon and Weston. Straight-line distance: 229.03 mi (368.59 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 Weston
City in Missouri
| Population | 1,834 |
| Coordinates | 39.4111100, -94.9016300 |
| Altitude | 243 |
| Country | United States |
End: Weston (-94.90163, 39.41111)
Estimated Travel Time
Distance: 406 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 23m |
| 40 mph (64.37 km/h) | 06h 18m |
| 50 mph (80.47 km/h) | 05h 02m |
| 60 mph (96.56 km/h) | 04h 12m |
| 70 mph (112.65 km/h) | 03h 36m |
| 80 mph (129 km/h) | 03h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $33.52 | $67.05 |
| Mid-grade | $4.25 | $37.81 | $75.62 |
| Premium | $4.65 | $41.37 | $82.75 |
| Diesel | $5.30 | $47.15 | $94.31 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.