The drive from Piedmont, MO to O'Fallon, MO covers 154.9 miles and takes about 3h 9m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on US 67, I 55, I 270 for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 81.3 miles on US 67.
At current regular gas prices, budget about $24.22 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
77.5 miles from Piedmont, MO
A natural place for your longest stop of the day
, about 1h 35m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 9m. Total distance: 154.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 9m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (95%). Some complex stretches to watch for.
Drive Character
This is a 3h 9m highway drive covering 154.9 miles, with most of the trip on US 67 and I 55. The longest continuous stretch is about 81.3 miles on US 67.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 23 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
US 67 is the longest continuous segment at about 81.3 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on US 67 and I 55. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 118.8 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 154.9 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 118.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 119.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 138 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 17 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
118.8 mi into trip|~2h 22m in
Take the exit toward I 270 West, I 255 East: Kansas City, Chicago
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 196
Toward I 270 West, I 255 East: Kansas City, Chi...
8
119.1 mi into trip|~2h 23m in
Keep slight left at fork toward I 270 West: Kansas City
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward I 270 West: Kansas City
8
138 mi into trip|~2h 47m in
Take the exit toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
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 20A
Toward I 70: Kansas City, Saint Louis, Saint Lo...
7
139.1 mi into trip|~2h 48m in
Keep slight left at fork toward I 70 West: Kansas City
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward I 70 West: Kansas City
8
153.4 mi into trip|~3h 6m 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
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Piedmont, MO and O'Fallon, MO, road signs point toward Chicago, Saint Louis and Saint Louis Lambert International Airport.
Chicago
118.8 mi in|~2h 22m
Saint Louis
138 mi in|~2h 47m
Saint Louis Lambert International Airport
138 mi in|~2h 47m
Main Roads
Road
Distance
Duration
US 67
81.3 mi
1h 33m
I 55
20.5 mi
22m
I 270
18.1 mi
22m
MO 34
13.7 mi
20m
I 70
13.6 mi
16m
Rosa Parks Highway
1.3 mi
1m
North Main Street
0.9 mi
2m
East Terra Lane
0.9 mi
1m
Longest stretch:
US 67
— 81.3 mi, about 1h 33m
Turn-by-Turn Driving Directions
Step-by-step road directions between Piedmont, MO and O'Fallon, MO.
1
Start on MO B
66 ft·4 sec·East Fir Street
2
Turn right onto MO 34; MO 49
0.9 mi·2 min·North Main Street
3
Turn right onto MO 34
14 mi·20 min·MO 34
4
Turn left
0.5 mi·1 min
5
Continue on this road
0.1 mi·15 sec·this road
6
Merge onto US 67
81 mi·1 hr 32 min·US 67
7
Keep slight right at fork onto US 67
0.3 mi·27 sec·US 67
8
Take the exit
0.3 mi·49 sec
Toward I 55 North: Saint Louis
9
Merge onto I 55
21 mi·22 min·I 55
10
Continue on I 55
1.3 mi·1 min·Rosa Parks Highway
11
Take the exit
0.2 mi·27 sec
Exit 196Toward I 270 West, I 255 East: Kansas City, ChicagoUse the slight right lane.
12
Keep slight left at fork
388 ft·8 sec
Toward I 270 West: Kansas CityUse the slight left lane.
13
Continue on this road
0.7 mi·1 min·this road
Exit 196Toward I 270 West
14
Merge onto I 270
18 mi·22 min·I 270
Use the straight lane.
15
Take the exit
1.0 mi·1 min
Exit 20AToward I 70: Kansas City, Saint Louis, Saint Louis Lambert International AirportUse the slight right lane.
16
Keep slight left at fork
0.1 mi·11 sec
Toward I 70 West: Kansas CityUse the slight left lane.
17
Continue on this road
0.6 mi·57 sec·this road
Exit 20BToward I 70 West: Kansas City
18
Merge onto I 70
14 mi·16 min·I 70
Use the straight / slight right lanes.
19
Take the exit
390 ft·8 sec
Exit 218Toward MO K: O'Fallon, Main StreetUse the slight right lane.
20
Turn straight onto East Terra Lane
0.9 mi·1 min·East Terra Lane
Use the straight lane.
21
Turn right onto South Main Street
0.5 mi·1 min·South Main Street
22
Turn right
25 ft·1 sec
23
Arrive at destination
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 77.5 miles from Piedmont, MO, or about 1h 35m into the drive.
The longest continuous stretch on this route runs about 81.3 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 34 miles or 45m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 77.5 miles or 1h 35m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 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 Piedmont, 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 Piedmont, MO
This is one driving day of about 154.9 miles and 3h 9m.
Your first comfortable stop window is around 34 miles from Piedmont, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on US 67 for about 81.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 77.5 mi from Piedmont, MO
· 1h 35m into the drive
The midpoint is around 77.5 miles from Piedmont, MO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before US 67 if your tank is already low. That segment runs about 81.3 miles.
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.
National Parks Near This Route
Worth a detour if your schedule allows.
Gateway Arch National Park
National Park
Gateway Arch National Park commemorates President Jefferson’s vision of a continental nation, the individuals and cultural groups who helped shape its history, St. Louis’ role in westward expansion, a...
13 mi from route
~33 min detour
$19
near mile 122.9
Established by 1750, Ste. Geneviève was the first permanent European settlement in Missouri. Early French Canadian settlers were drawn here by the rich agricultural land known as Le Grand Champ (the B...
25 mi from route
~62 min detour
Free
near mile 96.2
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$24.22 one way
$48.43 round trip
$3.97/gal25.4 MPG avg54 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$26.59
$53.18
premium
$4.89
$29.81
$59.62
diesel
$5.61
$34.20
$68.40
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$24
Meals
$25–$50
Total
$49–$74
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 54.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
EV Charging Along Route
4 DC fast chargers
· Coverage: good
ChargePoint Charging Station
St Peters, Missouri
ChargePoint
1 DCFC
Blink Charging Station
O'Fallon, Missouri
Blink
1 DCFC
EVgo Charging Station
O'Fallon, Missouri
EVgo
1 DCFC
TeslaPride
O'Fallon, Missouri
Other
1 DCFC
ChargePoint: 1
Blink: 1
EVgo: 1
Other: 1
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $16 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
46.5
0
$16.26
$7.44
Efficient EV
38.7
0
$13.55
$6.20
EV Truck/SUV
62
0
$21.69
$9.91
Gas CO2
54 kg
EV CO2
18 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.
Forecast as of Apr 15, 2026
Origin
Piedmont, MO
Afternoon
in Piedmont on Friday
Local time
2:36 PM
CDT
Current temp
52°F
Unavailable
Live forecast
Destination
O'Fallon, MO
Afternoon
in O'Fallon on Friday
Local time
2:36 PM
CDT
Current temp
57°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
5 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
3h 9m 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 Piedmont, MO to O'Fallon, MO covers 154.9 miles and takes about 3h 9m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are US 67, I 55, I 270. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 77.5 miles from Piedmont, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $24.22 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This is a demanding drive. With 17 significant decision points across 154.9 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 118.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 119.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 138 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Between Piedmont, MO and O'Fallon, MO, road signs point toward Chicago, Saint Louis and Saint Louis Lambert International Airport.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
