Origin
O'Fallon, MO
Afternoon in O'Fallon on Thursday
Local time
3:26 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Wentzville, MO
Last recalculated Apr 16, 2026
Drive Time
13m
Distance
9.4 mi
15 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$1
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 13m
★
6 AM
0h 14m
8 AM
0h 16m
10 AM
0h 15m
12 PM
0h 15m
3 PM
0h 15m
5 PM
0h 16m
8 PM
0h 13m
★
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Wikimedia Commons
Wentzville, MO
Wikimedia Commons
Trip Overview
The drive from O'Fallon, MO to Wentzville, MO covers 9.4 miles and takes about 13m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 70, South Main Street, South Church Street for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 8 miles on I 70. At current regular gas prices, budget about $1.47 one way before food or hotel costs.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 13m. Total distance: 9.4 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
13m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (85%). Some complex stretches to watch for.
Drive Character
This is a 13m highway drive covering 9.4 miles, with most of the trip on I 70 and South Main Street. The longest continuous stretch is about 8 miles on I 70.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 14 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 70 is the longest continuous segment at about 8 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 70 and South Main Street. You will hit about 11 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.6 miles in.
Driving Effort
5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 9.4 miles you will encounter 11 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.6 miles: Lane positioning matters here; at 0.6 miles (South Main Street): Sharp turn - reduce speed on approach; at 0.7 miles (West Terra Lane): Lane positioning matters here.
Critical Maneuvers
5 of 11 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
6
0.6 mi into trip
|
~1m in
Turn left toward I 70 East
Lane positioning matters here
Use the left lane.
Toward I 70 East
6
0.6 mi into trip
|
~1m in
|
South Main Street
Turn sharp left onto South Main Street
Sharp turn - reduce speed on approach
6
0.7 mi into trip
|
~2m in
|
West Terra Lane
Turn left onto West Terra Lane
Lane positioning matters here
Use the left lane.
5
0.9 mi into trip
|
~2m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
9.3 mi into trip
|
~13m in
|
South Linn Avenue
At end of road, turn left onto South Linn Avenue
Complex interchange - multiple decisions in a short stretch
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from O'Fallon, MO to Wentzville, MO, road signs begin pointing toward Mo Z along the way.
Mo Z
8.8 mi in
|
~12m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 8 mi | 9m |
| South Main Street | 0.6 mi | 1m |
| South Church Street | 0.2 mi | <1m |
| South Linn Avenue | 0.1 mi | <1m |
| West Terra Lane | 0.1 mi | <1m |
| West 4th Street | <0.1 mi | <1m |
| East Allen Street | <0.1 mi | <1m |
Longest stretch:
I 70
— 8 mi, about 9m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Wentzville, MO.
1
Start on this road
25 ft
·
7 sec
·
this road
2
Turn left onto South Main Street
0.6 mi
·
1 min
·
South Main Street
3
Turn left
34 ft
·
6 sec
Toward I 70 East
Use the left lane.
4
Turn sharp left onto South Main Street
284 ft
·
11 sec
·
South Main Street
5
Turn left onto West Terra Lane
0.1 mi
·
12 sec
·
West Terra Lane
Use the left lane.
6
Take the ramp
479 ft
·
6 sec
Toward I 70 West
7
Merge onto I 70
8.0 mi
·
9 min
·
I 70
Use the straight / slight right lanes.
8
Take the exit
0.2 mi
·
23 sec
Exit 209
Toward MO Z
9
Enter roundabout onto South Church Street
20 ft
·
0 sec
·
South Church Street
10
Continue on South Church Street
0.2 mi
·
39 sec
·
South Church Street
11
Turn right onto West 4th Street
442 ft
·
20 sec
·
West 4th Street
12
At end of road, turn left onto South Linn Avenue
0.1 mi
·
26 sec
·
South Linn Avenue
13
Turn right onto East Allen Street
40 ft
·
1 sec
·
East Allen Street
14
Arrive at destination
East Allen Street
Fuel & Cost
Regular Gas
$1.47 one way
$2.94 round trip
$3.97/gal
25.4 MPG avg
3 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $1.61 | $3.23 |
| premium | $4.89 | $1.81 | $3.62 |
| diesel | $5.61 | $2.08 | $4.15 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$1
Estimated CO2 emission: 3.3 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $1 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 2.8 | 0 | $0.99 | $0.45 |
| Efficient EV | 2.4 | 0 | $0.82 | $0.38 |
| EV Truck/SUV | 3.8 | 0 | $1.32 | $0.60 |
Gas CO2
3 kg
EV CO2
1 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Destination
Wentzville, MO
Afternoon in Wentzville on Thursday
Local time
3:26 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
13m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from O'Fallon, MO to Wentzville, MO covers 9.4 miles and takes about 13m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 70, South Main Street, South Church Street. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 4.7 miles from O'Fallon, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $1.47 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This drive requires moderate attention. Across 9.4 miles you will encounter 11 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 0.6 miles: Lane positioning matters here; at 0.6 miles (South Main Street): Sharp turn - reduce speed on approach; at 0.7 miles (West Terra Lane): Lane positioning matters here.
On the drive from O'Fallon, MO to Wentzville, MO, road signs begin pointing toward Mo Z along the way.
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