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

Save up to 10 min

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.

Best Time Drive vs Fly

Google Maps Waze Apple Maps

Download GPX

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.

This route has more turning and local-road decision points than a simple highway run.

There are about 15 navigation steps in the underlying route data, so the final approach matters more than the middle miles.

Wydown Boulevard is one of the defining roads on this drive.

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?

Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. Navigation is very simple — set it and forget it for most of the drive.

Route Complexity 1/10

Very easy - short and simple to drive

The drive from Clayton, MO to O'Fallon, MO is easy. At 40m with 0% highway, most drivers will find it relaxed and low-stress.

Where does it get tricky?

This route does not have any notably tricky sections. Most of the drive from Clayton, MO to O'Fallon, MO is straightforward, with well-signed roads and simple exits.

Main Roads

Road	Distance	Duration
Wydown Boulevard	Unavailable	Refreshing
South Hanley Road	Unavailable	Refreshing
Shaw Park Drive	Unavailable	Refreshing
Forest Park Parkway West	Unavailable	Refreshing
Forest Park Parkway	Unavailable	Refreshing
I 170 North	Unavailable	Refreshing
Inner Belt Expressway	Unavailable	Refreshing
I 70 West	Unavailable	Refreshing

Per-road distance and duration are being refreshed from OSRM for this route.

Longest stretch: Wydown Boulevard — detailed segment metrics are refreshing.

Turn-by-Turn Driving Directions

Step-by-step road directions between Clayton, MO and O'Fallon, MO.

1

Start on Hillvale Drive

177 ft · 8 sec · Hillvale Drive

2

Turn left onto Wydown Boulevard

0.6 mi · 1 min · Wydown Boulevard

3

At the end of the road, turn right onto South Hanley Road

0.3 mi · 31 sec · South Hanley Road

4

Turn left onto Shaw Park Drive

0.3 mi · 33 sec · Shaw Park Drive

5

Take the ramp straight toward Forest Park Parkway West

295 ft · 6 sec · Forest Park Parkway West

6

Merge slight left onto Forest Park Parkway

0.3 mi · 40 sec · Forest Park Parkway

7

Keep slight right to continue on I 170 North

0.2 mi · 37 sec · I 170 North

8

Merge slight left onto Inner Belt Expressway

6.1 mi · 7 min · Inner Belt Expressway

9

Take the exit slight left toward I 70 West: Kansas City

0.4 mi · 37 sec · I 70 West: Kansas City

10

Merge slight right

20 mi · 24 min

11

Take the exit slight right toward MO K: O'Fallon, Main Street

390 ft · 8 sec · MO K: O'Fallon, Main Street

12

Turn straight onto East Terra Lane

0.9 mi · 1 min · East Terra Lane

13

Turn right onto South Main Street

0.5 mi · 1 min · South Main Street

14

Turn right

26 ft · 2 sec

15

Arrive at your 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.

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 34m

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.

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

East Saint Louis, IL

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

Alton, IL

Fuel and coffee

A short stop after about 29.6 miles helps settle the day before fatigue starts building.

East Saint Louis, IL

Meal break

The midpoint is around 14.8 miles from Clayton, MO, which is a good place for a longer meal and fuel stop.

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	DC Fast	Home Charge
Average EV	8.9	$3.11	$1.42
Efficient EV	7.4	$2.59	$1.18
EV Truck/SUV	11.8	$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.

Forecast data refreshed 3 days ago

Origin

Clayton, MO

Late night in Clayton on Monday

Local time

3:36 AM

CDT

Current temp

81°F

Unavailable

Live forecast

Destination

O'Fallon, MO

Late night in O'Fallon on Monday

Local time

3:36 AM

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 Wydown Boulevard, South Hanley Road, Shaw Park Drive. Expect a mix of highway and local road driving.

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.

The drive from Clayton, MO to O'Fallon, MO is easy. At 40m with 0% highway, most drivers will find it relaxed and low-stress.

This route does not have any notably tricky sections. Most of the drive from Clayton, MO to O'Fallon, MO is straightforward, with well-signed roads and simple exits.

The route from Clayton, MO to O'Fallon, MO does not surface many named destination signs beyond the main corridor.

Mostly flat terrain. The route ranges from 444 ft to 613 ft elevation with about 464 ft of total climbing.

Was this route helpful?

Thanks for your feedback!

Your tip has been submitted. Thanks!

/500

Explore More

Return Trip

O'Fallon, MO to Clayton, MO

Plan the drive back the other way.

28.7 mi 40m

Explore more options from Clayton, MO or browse trips ending in O'Fallon, MO.

Looking for more statewide routes? Browse MO road trips.

Explore maps for Clayton, MO or O'Fallon, MO on MapSof.net.