Origin
Clayton, MO
Afternoon in Clayton on Sunday
Local time
3:57 PM
CDT
Current temp
81°F
Unavailable
Live forecast
Trip from Clayton, MO to O'Fallon, MO
Drive Time
40m
Distance
29.6 mi
48 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$5
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
0h 37m
★
6 AM
0h 40m
8 AM
0h 47m
10 AM
0h 43m
12 PM
0h 42m
3 PM
0h 43m
5 PM
0h 47m
8 PM
0h 38m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Clayton, MO
cottonbro studio
O'Fallon, MO
Valeria Boltneva
Trip Overview
If you are looking to travel between Clayton and O'Fallon, Missouri, you are in for a quick 29.6-mile trip that typically takes about 40 minutes. This route is a straightforward, highway-focused drive that fits perfectly into a single day, requiring no overnight stays. You can expect to spend approximately $5 on fuel for this transit, making it a budget-friendly option for your schedule. Because both cities are located within the Midwest, the transition is seamless and familiar. It is an ideal commute or day trip for those wanting a direct connection between these two Missouri points without the need for multiple stops.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
0 planned breaks
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
14.8 miles from Clayton, MO
A natural place for your longest stop of the day , about 20m into the drive .
Drive Character
Expect a high-speed experience, as 89% of this 29.6-mile route consists of highway driving. You will spend the bulk of your time on I-70, which accounts for the longest uninterrupted stretch of 19.8 miles. The journey primarily utilizes I-70, the Inner Belt Expressway, and East Terra Lane to bridge the gap between Clayton and O'Fallon. This is not a winding, scenic backroad experience; instead, it is a purposeful, efficient drive designed for steady movement. You will find that the road maintains a consistent, fast-paced character throughout the entire duration of the trip.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 15 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 19.8 miles.
Elevation Profile
Mostly flat terrain
613 ft
444 ft
Total Climb
464 ft
Total Descent
482 ft
Highest Point
613 ft
~6.2 mi in
Elevation Range
169 ft
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 70 and Inner Belt Expressway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.9 miles in near Shaw Park Drive.
Route Complexity
8/10
Demanding - plan breaks and stay ahead of the key maneuvers
This is a demanding drive. With 12 significant decision points across 29.6 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 0.9 miles (Shaw Park Drive): Lane positioning matters here; at 1.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 7.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 12 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
6
0.9 mi into trip
|
~2m in
|
Shaw Park Drive
Turn left onto Shaw Park Drive
Lane positioning matters here
Use the straight / left / right lanes.
7
1.6 mi into trip
|
~3m in
Keep slight right at fork toward I 170 North
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 170 North
7
7.9 mi into trip
|
~11m in
Take the exit toward I 70 West: Kansas City
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight left lanes.
Exit 7B
Toward I 70 West: Kansas City
8
28.1 mi into trip
|
~37m in
Take the exit toward MO K: O'Fallon, Main Street
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 218
Toward MO K: O'Fallon, Main Street
6
29.1 mi into trip
|
~38m in
|
South Main Street
Turn right onto South Main Street
Lane positioning matters here
Use the none lane.
Towns Along This Route
On the drive from Clayton, MO to O'Fallon, MO, road signs begin pointing toward Mo K: O'fallon along the way.
Mo K: O'fallon
28.1 mi in
|
~37m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 19.8 mi | 24m |
| Inner Belt Expressway | 6.1 mi | 7m |
| East Terra Lane | 0.9 mi | 1m |
| Wydown Boulevard | 0.6 mi | 1m |
| South Main Street | 0.5 mi | 1m |
| Forest Park Parkway | 0.3 mi | <1m |
| Shaw Park Drive | 0.3 mi | <1m |
| South Hanley Road | 0.3 mi | <1m |
Longest stretch:
I 70
— 19.8 mi, about 24m
Turn-by-Turn Driving Directions
Step-by-step road directions between Clayton, MO and O'Fallon, MO.
1
Start on Hillvale Drive
178 ft
·
7 sec
·
Hillvale Drive
2
Turn left onto Wydown Boulevard
0.6 mi
·
1 min
·
Wydown Boulevard
3
At end of road, turn right onto South Hanley Road
0.3 mi
·
30 sec
·
South Hanley Road
4
Turn left onto Shaw Park Drive
0.3 mi
·
33 sec
·
Shaw Park Drive
Use the straight / left / right lanes.
5
Take the ramp
294 ft
·
6 sec
Toward Forest Park Parkway West
6
Merge onto Forest Park Parkway
0.3 mi
·
39 sec
·
Forest Park Parkway
Use the straight / slight right lanes.
7
Keep slight right at fork
0.2 mi
·
36 sec
Toward I 170 North
Use the slight right lane.
8
Merge onto I 170
6.1 mi
·
7 min
·
Inner Belt Expressway
Use the none lane.
9
Take the exit
0.4 mi
·
36 sec
Exit 7B
Toward I 70 West: Kansas City
Use the straight / slight left lanes.
10
Merge onto I 70
20 mi
·
24 min
·
I 70
Use the straight lane.
11
Take the exit
390 ft
·
8 sec
Exit 218
Toward MO K: O'Fallon, Main Street
Use the slight right lane.
12
Turn straight onto East Terra Lane
0.9 mi
·
1 min
·
East Terra Lane
Use the straight lane.
13
Turn right onto South Main Street
0.5 mi
·
1 min
·
South Main Street
Use the none lane.
14
Turn right
25 ft
·
1 sec
15
Arrive at destination
Trip Plan
Since the entire trip lasts only 40 minutes, you have maximum flexibility regarding your departure time. You will not need to plan for any formal stops, as the distance is short enough to drive in one go. Keep in mind that because the vast majority of this route is on major highways, you should stay alert for typical interstate traffic patterns. Given the $5 fuel budget, you can easily top off your tank before leaving Clayton and arrive in O'Fallon without needing to refuel along the way. Use the lack of required stops to your advantage, allowing you to hit the road whenever it best suits your personal agenda.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 14.8 miles from Clayton, MO, or about 20m into the drive.
The longest continuous stretch on this route runs about 19.8 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 29.6 miles or 40m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 14.8 miles or 20m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 33m
Traffic, exits, and arrival timing usually matter more near O'Fallon, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Clayton, MO so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Clayton, MO
This is one driving day of about 29.6 miles and 40m.
Your first comfortable stop window is around 80 miles from Clayton, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
You may only need one short stretch stop if conditions stay smooth.
The longest stretch is on I 70 for about 19.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 14.8 mi from Clayton, MO · 20m into the drive
Mid-route town
Meal stop
15 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Arriving in O'Fallon, MO
The final approach into O'Fallon, MO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around O'Fallon, MO.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$4.50 one way
$8.99 round trip
$3.86/gal
25.4 MPG avg
10 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $4.96 | $9.91 |
| premium | $4.80 | $5.59 | $11.18 |
| diesel | $5.64 | $6.58 | $13.15 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$5
Meals
$25–$50
Total
$30–$55
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 10.4 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $3 in charging · 0 stops · 70% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 8.9 | 0 | $3.11 | $1.42 |
| Efficient EV | 7.4 | 0 | $2.59 | $1.18 |
| EV Truck/SUV | 11.8 | 0 | $4.14 | $1.89 |
Gas CO2
10 kg
EV CO2
3 kg (70% 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
O'Fallon, MO
Afternoon in O'Fallon on Sunday
Local time
3:57 PM
CDT
Current temp
53°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
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
28 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
40m 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 Clayton, MO to O'Fallon, MO covers 29.6 miles and takes about 40m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 70, Inner Belt Expressway, East Terra Lane. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 14.8 miles from Clayton, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $4.50 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 is a demanding drive. With 12 significant decision points across 29.6 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 0.9 miles (Shaw Park Drive): Lane positioning matters here; at 1.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 7.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
On the drive from Clayton, MO to O'Fallon, MO, road signs begin pointing toward Mo K: O'fallon along the way.
Mostly flat terrain. The route ranges from 444 ft to 613 ft elevation with about 464 ft of total climbing.
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