Origin
O'Fallon, MO
Afternoon in O'Fallon on Wednesday
Local time
4:33 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Saint Robert, MO
Last recalculated Apr 15, 2026
Drive Time
2h 34m
Distance
127.5 mi
205 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$20
one way
Best Time to Leave
4 AM
2h 24m
★
6 AM
2h 35m
8 AM
2h 55m
10 AM
2h 42m
12 PM
2h 40m
3 PM
2h 43m
5 PM
2h 54m
8 PM
2h 28m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Wikimedia Commons
Trip Overview
The drive from O'Fallon, MO to Saint Robert, MO covers 127.5 miles and takes about 2h 34m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on South Main Street, I 64 East, Avenue of the Saints for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $19.93 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
63.7 miles from O'Fallon, MO
A natural place for your longest stop of the day , about 1h 17m into the drive .
Drive Character
Expect a 2h 34m drive with frequent turns across 127.5 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 23 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
South Main Street is one of the defining roads on this drive.
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 O'Fallon, MO to Saint Robert, MO is easy. At 2h 34m 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 O'Fallon, MO to Saint Robert, MO is straightforward, with well-signed roads and simple exits.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| South Main Street | — | — |
| I 64 East | — | — |
| Avenue of the Saints | — | — |
| Chesterfield Airport Road | — | — |
| Olive Street Road | — | — |
| North Eatherton Road | — | — |
| the route | — | — |
| MO 100 West | — | — |
Some road-level metrics are being recalculated.
Longest stretch:
South Main Street
— detailed segment metrics are refreshing.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Saint Robert, MO.
1
Start on the route
26 ft
·
7 sec
·
the route
2
Turn left onto South Main Street
0.5 mi
·
1 min
·
South Main Street
3
Continue straight
3.1 mi
·
5 min
4
Continue straight
3.4 mi
·
5 min
5
Take the ramp slight right toward I 64 East, US 40 East, US 61 South
0.3 mi
·
22 sec
·
I 64 East, US 40 East, US 61 South
6
Merge slight left onto Avenue of the Saints
3.7 mi
·
4 min
·
Avenue of the Saints
7
Take the exit slight right toward Chesterfield Airport Road
0.5 mi
·
58 sec
·
Chesterfield Airport Road
8
Continue on Chesterfield Airport Road
361 ft
·
7 sec
·
Chesterfield Airport Road
9
Turn right onto Olive Street Road
210 ft
·
5 sec
·
Olive Street Road
10
Turn right onto Olive Street Road
0.9 mi
·
1 min
·
Olive Street Road
11
Continue on North Eatherton Road
2.4 mi
·
4 min
·
North Eatherton Road
12
Enter the roundabout and take exit 2 toward the route
69 ft
·
1 sec
·
the route
13
Exit the roundabout
4.3 mi
·
6 min
14
Enter the roundabout and take exit 2 toward the route
95 ft
·
2 sec
·
the route
15
Exit the roundabout
0.4 mi
·
45 sec
16
Enter the roundabout and take exit 2 toward MO 100 West: Gray Summit
75 ft
·
2 sec
·
MO 100 West: Gray Summit
17
Exit the roundabout onto MO 100 West: Gray Summit
0.2 mi
·
33 sec
·
MO 100 West: Gray Summit
18
Merge slight left
13 mi
·
18 min
19
Take the exit slight right toward I 44 West, US 50 West: St. Clair
0.2 mi
·
14 sec
·
I 44 West, US 50 West: St. Clair
20
Merge slight left
93 mi
·
1 hr 40 min
21
Take the exit slight right toward I 44 Business: Waynesville
0.2 mi
·
23 sec
·
I 44 Business: Waynesville
22
Turn straight
0.5 mi
·
57 sec
23
Arrive at your destination
Trip Plan
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.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 63.7 miles from O'Fallon, MO, or about 1h 17m 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 28 miles or 33m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 63.7 miles or 1h 17m 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 6m
Traffic, exits, and arrival timing usually matter more near Saint Robert, 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 127.5 miles and 2h 34m.
Your first comfortable stop window is around 28 miles from O'Fallon, 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.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 63.7 mi from O'Fallon, MO · 1h 17m into the drive
Mid-route town
Meal stop
64 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 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 63.7 miles from O'Fallon, MO, which is a good place for a longer meal and fuel stop.
Arriving in Saint Robert, MO
The final approach into Saint Robert, 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 Saint Robert, 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
$19.93 one way
$39.87 round trip
$3.97/gal
25.4 MPG avg
45 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $21.89 | $43.77 |
| premium | $4.89 | $24.54 | $49.07 |
| diesel | $5.61 | $28.15 | $56.30 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$20
Meals
$25–$50
Total
$45–$70
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 44.6 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $13 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 38.3 | 0 | $13.39 | $6.12 |
| Efficient EV | 31.9 | 0 | $11.16 | $5.10 |
| EV Truck/SUV | 51 | 0 | $17.85 | $8.16 |
Gas CO2
45 kg
EV CO2
15 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
Saint Robert, MO
Afternoon in Saint Robert on Wednesday
Local time
4:33 PM
CDT
Current temp
57°F
Unavailable
Live forecast
79°F
Wildwood, MO
64 mi in
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
2h 34m 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 Saint Robert, MO covers 127.5 miles and takes about 2h 34m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are South Main Street, I 64 East, Avenue of the Saints. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 63.7 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 $19.93 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.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
The drive from O'Fallon, MO to Saint Robert, MO is easy. At 2h 34m 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 O'Fallon, MO to Saint Robert, MO is straightforward, with well-signed roads and simple exits.
The route from O'Fallon, MO to Saint Robert, MO does not surface many named destination signs beyond the main corridor.
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