How far is Ashland, MO from O'Fallon, MO?
The driving distance from Ashland, MO to O'Fallon, MO is about 100.8 miles (162.2 km), with a travel time of about 01h 37m by car.
- The straight-line flight distance is about 83.9 miles (135 km).
- For a round trip, plan for roughly 03h 14m 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 01h 37m.
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.
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Ashland and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ashland and O'Fallon.
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1
Start on East Broadway
1031 ft · 29 sec · East Broadway
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2
Enter the roundabout and take exit 2 toward East Broadway
53 m · 4 sec · East Broadway
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3
Exit the roundabout onto East Broadway
148 m · 11 sec · East Broadway
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4
Enter the roundabout and take exit 2 toward the route
86 m · 6 sec
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5
Exit the roundabout
997 ft · 27 sec
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6
Merge slight left
13.1 mi · 14 min
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7
Take the exit slight right toward I 70, US 40, MO PP: Kansas City, Saint Louis
2021 ft · 43 sec
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8
Continue straight
159 m · 10 sec
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9
Take the exit right toward I 70 East, US 40 East: Saint Louis
1308 ft · 32 sec
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10
Continue on Dwight D. Eisenhower Highway
88.2 mi · 1 hr 44 min · Dwight D. Eisenhower Highway
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11
Take the exit slight right toward MO K: O'Fallon
1765 ft · 43 sec
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12
Turn straight onto Drennen Parkway
46 m · 3 sec · Drennen Parkway
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13
Keep slight right to continue on Drennen Parkway
51 m · 6 sec · Drennen Parkway
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14
Turn slight left onto MO K: O'Fallon
19 m · 3 sec
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15
Continue on South Main Street
3115 ft · 2 min · South Main Street
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16
Turn right
8 m · 2 sec
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17
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Ashland 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.
Dwight D. Eisenhower Highway
Continue on Dwight D. Eisenhower Highway
88.2 mi · 01h 44m
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.
Slight Chance Rain Showers then Chance Showers And Thunderstorms leaving Ashland and Mostly Sunny near O'Fallon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ashland to O'Fallon?
The road trip is about 100.8 miles (162.2 km) and usually takes 01h 37m 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?
Montgomery City is a useful midpoint, sitting about 51.8 miles from Ashland and 49 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 83.9 miles (135 km), while the road route adds roughly 16.9 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 3:16 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $13.42 one way or $26.85 round trip. Estimated CO2 is about 31.6 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers then Chance Showers And Thunderstorms around Ashland and Mostly Sunny near O'Fallon.
Stop Ideas Near Montgomery City
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 Montgomery City.
Hermann
Washington
Jefferson City
Kirkwood
Flight Path Map
This map shows the direct air route between Ashland and O'Fallon. Straight-line distance: 83.9 mi (135.02 km).
#1 Ashland
City in Boone County, Missouri, United States
| Population | 4,031 |
| Coordinates | 38.7744800, -92.2571300 |
| Altitude | 274 |
| 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: 162 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 21m |
| 40 mph (64.37 km/h) | 02h 31m |
| 50 mph (80.47 km/h) | 02h 00m |
| 60 mph (96.56 km/h) | 01h 40m |
| 70 mph (112.65 km/h) | 01h 26m |
| 80 mph (129 km/h) | 01h 15m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $13.42 | $26.85 |
| Mid-grade | $4.25 | $15.14 | $30.28 |
| Premium | $4.65 | $16.57 | $33.14 |
| Diesel | $5.30 | $18.88 | $37.76 |
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.