How far is O'Fallon, MO from Ellisville, MO?
The driving distance from O'Fallon, MO to Ellisville, MO is about 21.9 miles (35.3 km), with a travel time of about 00h 35m by car.
- The straight-line flight distance is about 16.2 miles (26.1 km).
- For a round trip, plan for roughly 01h 10m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 35m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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.
Village in the 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 O'Fallon and Ellisville.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Ellisville.
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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
9.4 mi · 12 min · Avenue of the Saints
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7
Take the exit slight right toward MO 340: Olive Boulevard, Clarkson Road
2173 ft · 58 sec
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8
Turn slight right onto MO 340
56 m · 7 sec
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9
Turn straight onto Clarkson Road
4.5 mi · 8 min · Clarkson Road
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10
Turn right onto Manchester Road
817 ft · 46 sec · Manchester Road
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11
Turn uturn onto Manchester Road
130 m · 9 sec · Manchester Road
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12
Arrive at your destination
0 m · 1 sec · Manchester Road
Car Route Details
A richer read on the saved driving route between O'Fallon and Ellisville.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Avenue of the Saints
Merge slight left onto Avenue of the Saints
9.4 mi · 00h 12m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving O'Fallon and Sunny near Ellisville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Ellisville?
The road trip is about 21.9 miles (35.3 km) and usually takes 00h 35m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Weldon Spring Heights is a useful midpoint, sitting about 10.9 miles from O'Fallon and 10.9 miles from Ellisville.
How much longer is the road route than the straight-line distance?
The direct path is about 16.2 miles (26.1 km), while the road route adds roughly 5.7 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 7:00 AM to 7:00 PM CDT. If you want a more comfortable same-day return, try to leave by 7:20 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.90 one way or $5.81 round trip. Estimated CO2 is about 6.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around O'Fallon and Sunny near Ellisville.
Stop Ideas Near Weldon Spring Heights
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Park
City of O'Fallon
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Weldon Spring Heights.
Kirkwood
Washington
Gateway Transportation Center
Alton
Flight Path Map
This map shows the direct air route between O'Fallon and Ellisville. Straight-line distance: 16.25 mi (26.15 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 Ellisville
City in Mississippi, United States
| Population | 9,848 |
| Coordinates | 38.5925500, -90.5870700 |
| Altitude | 221 |
| Country | United States |
End: Ellisville (-90.58707, 38.59255)
Estimated Travel Time
Distance: 35 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 43m |
| 40 mph (64.37 km/h) | 00h 32m |
| 50 mph (80.47 km/h) | 00h 26m |
| 60 mph (96.56 km/h) | 00h 21m |
| 70 mph (112.65 km/h) | 00h 18m |
| 80 mph (129 km/h) | 00h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $2.90 | $5.81 |
| Mid-grade | $4.25 | $3.27 | $6.55 |
| Premium | $4.65 | $3.58 | $7.17 |
| Diesel | $5.30 | $4.08 | $8.17 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.