How far is Charleston, MO from O'Fallon, MO?
The driving distance from Charleston, MO to O'Fallon, MO is about 178 miles (286.4 km), with a travel time of about 02h 39m by car.
- The straight-line flight distance is about 149.9 miles (241.2 km).
- For a round trip, plan for roughly 05h 18m 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 39m.
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, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Charleston and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Charleston and O'Fallon.
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1
Start on West Marshall Street
51 m · 7 sec · West Marshall Street
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2
Turn right onto South Main Street
1 mi · 2 min · South Main Street
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3
Take the ramp right
1236 ft · 30 sec
-
4
Merge slight left
10 mi · 11 min
-
5
Take the exit slight right toward I 55 North: Saint Louis
1987 ft · 48 sec
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6
Merge slight left
27.1 mi · 29 min
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7
Keep slight left
101.5 mi · 1 hr 49 min
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8
Continue on Rosa Parks Highway
1.3 mi · 2 min · Rosa Parks Highway
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9
Take the exit slight right toward I 270 West, I 255 East: Kansas City, Chicago
1279 ft · 27 sec
-
10
Keep slight left to continue on I 270 West: Kansas City
118 m · 8 sec
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11
Continue on I 270 West
1.2 km · 1 min
-
12
Merge slight left
18.1 mi · 23 min
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13
Take the exit slight right toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
1 mi · 1 min
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14
Keep slight left to continue on I 70 West: Kansas City
645 ft · 11 sec
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15
Continue on I 70 West: Kansas City
1 km · 57 sec
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16
Merge slight left
13.6 mi · 17 min
-
17
Take the exit slight right toward MO K: O'Fallon, Main Street
119 m · 8 sec
-
18
Turn straight onto East Terra Lane
1.4 km · 2 min · East Terra Lane
-
19
Turn right onto South Main Street
2830 ft · 1 min · South Main Street
-
20
Turn right
8 m · 2 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Charleston 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.
I 55 North
Keep slight left
102 mi · 01h 49m
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 Charleston 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 Charleston to O'Fallon?
The road trip is about 178 miles (286.4 km) and usually takes 02h 39m 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?
Saint Mary is a useful midpoint, sitting about 88.9 miles from Charleston and 89 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 149.9 miles (241.2 km), while the road route adds roughly 28.1 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 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 $23.68 one way or $47.36 round trip. Estimated CO2 is about 55.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Charleston and Sunny near O'Fallon.
Stop Ideas Near Saint Mary
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 Mary.
Du Quoin
Carbondale station
Gateway Transportation Center
Kirkwood
Flight Path Map
This map shows the direct air route between Charleston and O'Fallon. Straight-line distance: 149.87 mi (241.2 km).
#1 Charleston
City in Missouri
| Population | 5,015 |
| Coordinates | 36.9208900, -89.3506300 |
| Altitude | 98 |
| 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: 286 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 55m |
| 40 mph (64.37 km/h) | 04h 26m |
| 50 mph (80.47 km/h) | 03h 33m |
| 60 mph (96.56 km/h) | 02h 57m |
| 70 mph (112.65 km/h) | 02h 32m |
| 80 mph (129 km/h) | 02h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $23.68 | $47.36 |
| Mid-grade | $4.25 | $26.71 | $53.42 |
| Premium | $4.65 | $29.23 | $58.45 |
| Diesel | $5.30 | $33.31 | $66.62 |
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 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.