How far is La Plata, MO from O'Fallon, MO?
The driving distance from La Plata, MO to O'Fallon, MO is about 161.1 miles (259.3 km), with a travel time of about 02h 38m by car.
- The straight-line flight distance is about 127.1 miles (204.6 km).
- For a round trip, plan for roughly 05h 17m 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 38m.
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 Missouri, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between La Plata and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between La Plata and O'Fallon.
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1
Start on East Moore Street
6 m · 6 sec · East Moore Street
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2
Turn left onto South Gex Street
844 ft · 42 sec · South Gex Street
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3
Turn left onto East Clark Street
1.1 km · 1 min · East Clark Street
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4
Turn right
19 mi · 22 min
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5
Take the exit left toward US 36 East, MO 110 East: Hannibal
929 ft · 12 sec
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6
Merge slight left onto Chicago-Kansas City Expressway
52.9 mi · 1 hr 1 min · Chicago-Kansas City Expressway
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7
Continue on V.F.W. Memorial Highway
5.8 mi · 7 min · V.F.W. Memorial Highway
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8
Take the exit slight right toward Veterans Road
1167 ft · 30 sec
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9
Turn right onto Veterans Road
2.1 mi · 4 min · Veterans Road
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10
At the end of the road, turn left onto County Road 422
85 m · 7 sec · County Road 422
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11
Continue on Paris Gravel Road
2539 ft · 1 min · Paris Gravel Road
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12
Take the ramp right
37 m · 3 sec
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13
Merge slight left onto Avenue of the Saints
73.7 mi · 1 hr 27 min · Avenue of the Saints
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14
Take the exit slight left toward I 70 East: Saint Louis
2705 ft · 51 sec
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15
Merge slight left onto Dwight D Eisenhower Highway
6.4 mi · 8 min · Dwight D Eisenhower Highway
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16
Take the exit slight right toward MO K: O'Fallon
1765 ft · 43 sec
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17
Turn straight onto Drennen Parkway
46 m · 3 sec · Drennen Parkway
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18
Keep slight right to continue on Drennen Parkway
51 m · 6 sec · Drennen Parkway
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19
Turn slight left onto MO K: O'Fallon
19 m · 3 sec
-
20
Continue on South Main Street
3115 ft · 2 min · South Main Street
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21
Turn right
8 m · 2 sec
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22
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between La Plata 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.
Avenue of the Saints
Merge slight left onto Avenue of the Saints
73.7 mi · 01h 27m
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.
Mostly Sunny then Chance Showers And Thunderstorms leaving La Plata and Mostly Sunny then Chance Showers And Thunderstorms near O'Fallon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from La Plata to O'Fallon?
The road trip is about 161.1 miles (259.3 km) and usually takes 02h 38m 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?
Hannibal is a useful midpoint, sitting about 81.6 miles from La Plata and 79.5 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 127.1 miles (204.6 km), while the road route adds roughly 34 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 1:12 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.42 one way or $42.84 round trip. Estimated CO2 is about 50.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Chance Showers And Thunderstorms around La Plata and Mostly Sunny then Chance Showers And Thunderstorms near O'Fallon.
Stop Ideas Near Hannibal
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 Hannibal.
Quincy
Fort Madison station
Macomb
La Plata
Flight Path Map
This map shows the direct air route between La Plata and O'Fallon. Straight-line distance: 127.15 mi (204.63 km).
#1 La Plata
City in Macon County, Missouri
| Population | 1,303 |
| Coordinates | 40.0233700, -92.4915800 |
| Altitude | 285 |
| 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: 259 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 22m |
| 40 mph (64.37 km/h) | 04h 01m |
| 50 mph (80.47 km/h) | 03h 13m |
| 60 mph (96.56 km/h) | 02h 41m |
| 70 mph (112.65 km/h) | 02h 18m |
| 80 mph (129 km/h) | 02h 00m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $21.42 | $42.84 |
| Mid-grade | $4.25 | $24.16 | $48.31 |
| Premium | $4.65 | $26.43 | $52.87 |
| Diesel | $5.30 | $30.13 | $60.25 |
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.