Origin
O'Fallon, MO
Afternoon in O'Fallon on Sunday
Local time
3:52 PM
CDT
Current temp
53°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Clayton, MO
Drive Time
40m
Distance
28.7 mi
46 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$4
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
0h 38m
★
6 AM
0h 41m
8 AM
0h 48m
10 AM
0h 43m
12 PM
0h 43m
3 PM
0h 44m
5 PM
0h 47m
8 PM
0h 39m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Valeria Boltneva
Clayton, MO
cottonbro studio
Trip Overview
If you are traveling from O'Fallon to Clayton, you are looking at a straightforward 28.7-mile commute across Missouri. Expect to spend about 40 minutes behind the wheel, making this a perfect candidate for a single-day trip that requires no overnight stay. Your path primarily utilizes I-70, North Hanley Road, and the Inner Belt Expressway to navigate the Midwest landscape. With an estimated fuel cost of only $4, this is a highly economical route for your travel budget. Because the entire journey takes place within the same region, the transition between these two points is seamless and familiar. It is a practical, efficient drive that prioritizes speed over sightseeing.
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
14.3 miles from O'Fallon, MO
A natural place for your longest stop of the day , about 19m into the drive .
Drive Character
This trip is a quintessential highway-focused drive, with 77% of your time spent on major thoroughfares. You will quickly settle into a rhythm during the longest stretch of the journey, which spans 19.8 miles along I-70. While the interstate portion allows for steady speeds, the character of the road shifts as you transition onto North Hanley Road and the Inner Belt Expressway to reach your destination. You won't encounter any mandatory stops, allowing for a focused and uninterrupted experience. The personality of this route is utilitarian, designed to get you from O'Fallon to Clayton as efficiently as possible.
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 19.8 miles.
Elevation Profile
Mostly flat terrain
648 ft
443 ft
Total Climb
550 ft
Total Descent
532 ft
Highest Point
648 ft
~23.9 mi in
Elevation Range
205 ft
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 70 and North Hanley Road. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 21.4 miles in.
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 28.7 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 21.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 23.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 23.3 miles: Highway fork - watch signs carefully. 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.
7
21.4 mi into trip
|
~28m in
Take the exit toward I 170 South: Clayton
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 238A
Toward I 170 South: Clayton
7
23.2 mi into trip
|
~30m in
Take the exit toward MO 180: Saint Charles Rock Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 5
Toward MO 180: Saint Charles Rock Road
8
23.3 mi into trip
|
~30m in
Keep slight left at fork toward MO 180: Saint Charles Rock Road
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight left lanes.
Toward MO 180: Saint Charles Rock Road
6
24.1 mi into trip
|
~32m in
|
North Hanley Road
Turn right onto North Hanley Road
Lane positioning matters here
Use the right lane.
6
28 mi into trip
|
~39m in
|
Wydown Boulevard
Turn left onto Wydown Boulevard
Lane positioning matters here
Use the left lane.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 19.8 mi | 24m |
| North Hanley Road | 3.9 mi | 6m |
| Inner Belt Expressway | 1.5 mi | 1m |
| Drennen Parkway | 0.9 mi | 1m |
| Saint Charles Rock Road | 0.7 mi | 1m |
| South Main Street | 0.6 mi | 1m |
| Wydown Boulevard | 0.6 mi | 1m |
| Hillvale Drive | <0.1 mi | <1m |
Longest stretch:
I 70
— 19.8 mi, about 24m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Clayton, 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 onto Drennen Parkway
0.9 mi
·
1 min
·
Drennen Parkway
Use the left lane.
4
Take the ramp
438 ft
·
6 sec
Toward I 70 East: Saint Louis
Use the slight left lane.
5
Merge onto I 70
20 mi
·
24 min
·
I 70
Use the none lane.
6
Take the exit
0.4 mi
·
40 sec
Exit 238A
Toward I 170 South: Clayton
Use the slight right lane.
7
Merge onto I 170
1.5 mi
·
1 min
·
Inner Belt Expressway
Use the none lane.
8
Take the exit
0.1 mi
·
16 sec
Exit 5
Toward MO 180: Saint Charles Rock Road
Use the slight right lane.
9
Keep slight left at fork
426 ft
·
11 sec
Toward MO 180: Saint Charles Rock Road
Use the straight / slight left lanes.
10
Turn left onto MO 180
0.7 mi
·
1 min
·
Saint Charles Rock Road
Use the none lane.
11
Turn right onto North Hanley Road
3.9 mi
·
6 min
·
North Hanley Road
Use the right lane.
12
Turn left onto Wydown Boulevard
0.6 mi
·
1 min
·
Wydown Boulevard
Use the left lane.
13
Turn right onto Hillvale Drive
178 ft
·
7 sec
·
Hillvale Drive
14
Arrive at destination
Hillvale Drive
Trip Plan
Since this is a short, 40-minute drive, you have plenty of flexibility regarding your departure time. However, because you are relying heavily on major interstates like I-70, try to avoid peak rush hour traffic to ensure you maintain that estimated duration. You don't need to worry about planning for rest stops since the distance is quite manageable, but keeping a small buffer in your budget for the $4 fuel cost is always wise. A concrete tip for this specific route is to monitor traffic reports for the Inner Belt Expressway before you leave, as local congestion can impact the final leg of your journey. Enjoy the ease of this quick Missouri transit and focus on a smooth arrival in Clayton.
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 14.3 miles from O'Fallon, MO, or about 19m 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 28.7 miles or 40m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 14.3 miles or 19m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 32m
Traffic, exits, and arrival timing usually matter more near Clayton, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving O'Fallon, 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 O'Fallon, MO
This is one driving day of about 28.7 miles and 40m.
Your first comfortable stop window is around 80 miles from O'Fallon, 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 14.3 mi from O'Fallon, MO · 19m into the drive
Mid-route town
Meal stop
14 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
Fuel and coffee
A short stop after about 28.7 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 14.3 miles from O'Fallon, MO, which is a good place for a longer meal and fuel stop.
Arriving in Clayton, MO
The final approach into Clayton, 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 Clayton, 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
$4.36 one way
$8.72 round trip
$3.86/gal
25.4 MPG avg
10 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $4.81 | $9.61 |
| premium | $4.80 | $5.42 | $10.84 |
| diesel | $5.64 | $6.38 | $12.75 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$4
Meals
$25–$50
Total
$29–$54
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 10 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 | 8.6 | 0 | $3.01 | $1.38 |
| Efficient EV | 7.2 | 0 | $2.51 | $1.15 |
| EV Truck/SUV | 11.5 | 0 | $4.02 | $1.84 |
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
Clayton, MO
Afternoon in Clayton on Sunday
Local time
3:52 PM
CDT
Current temp
81°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 warmer 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 O'Fallon, MO to Clayton, MO covers 28.7 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, North Hanley Road, Inner Belt Expressway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 14.3 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 $4.36 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 28.7 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 21.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 23.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 23.3 miles: Highway fork - watch signs carefully. Lane positioning matters here.
The route from O'Fallon, MO to Clayton, MO does not surface many named destination signs beyond the main corridor.
Mostly flat terrain. The route ranges from 443 ft to 648 ft elevation with about 550 ft of total climbing.
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