Origin
O'Fallon, MO
Afternoon in O'Fallon on Thursday
Local time
1:19 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Forsyth, MO
Last recalculated Apr 16, 2026
Drive Time
4h 54m
Distance
250.2 mi
403 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$39
one way
EV Charging
Unknown
Best Time to Leave
4 AM
4h 41m
★
6 AM
4h 55m
8 AM
5h 22m
10 AM
5h 4m
12 PM
5h 2m
3 PM
5h 6m
5 PM
5h 21m
8 PM
4h 47m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Wikimedia Commons
Forsyth, MO
Lena Khrupina
Trip Overview
The drive from O'Fallon, MO to Forsyth, MO covers 250.2 miles and takes about 4h 54m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 44, MO 100, American Legion Memorial Highway for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 170.7 miles on I 44. At current regular gas prices, budget about $39.12 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
125.1 miles from O'Fallon, MO
A natural place for your longest stop of the day , about 2h 31m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 4h 54m. Total distance: 250.2 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 54m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (89%). Some complex stretches to watch for.
Drive Character
This is a 4h 54m highway drive covering 250.2 miles, with most of the trip on I 44 and MO 100. The longest continuous stretch is about 170.7 miles on I 44.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 30 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 44 is the longest continuous segment at about 170.7 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 44 and MO 100. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 7 miles in.
Driving Effort
7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 250.2 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 7 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 11 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 19.7 miles: Roundabout - know your exit number before entering.
Critical Maneuvers
5 of 17 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
6
7 mi into trip
|
~12m in
Take the ramp toward I 64 East, US 40 East, US 61 South
Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 64 East, US 40 East, US 61 South
7
11 mi into trip
|
~17m in
Take the exit toward Chesterfield Airport Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 14
Toward Chesterfield Airport Road
5
19.7 mi into trip
|
~33m in
Enter roundabout toward MO 100 West: Gray Summit
Roundabout - know your exit number before entering
Toward MO 100 West: Gray Summit
5
33.2 mi into trip
|
~52m in
Take the exit toward I 44 West, US 50 West: St. Clair
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 44 West, US 50 West: St. Clair
5
33.5 mi into trip
|
~52m in
|
I 44; US 50
Merge onto I 44; US 50
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 44 | 170.7 mi | 3h 3m |
| MO 100 | 13.3 mi | 18m |
| American Legion Memorial Highway | 12.1 mi | 13m |
| US Highway 65 | 12 mi | 13m |
| Schoolcraft Freeway | 11 mi | 13m |
| US 160 | 10.3 mi | 15m |
| MO K | 6.5 mi | 11m |
| MO 109 | 4.7 mi | 7m |
Longest stretch:
I 44
— 170.7 mi, about 3h 3m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Forsyth, MO.
1
Start on this road
25 ft
·
7 sec
·
this road
2
Turn left onto South Main Street
0.5 mi
·
1 min
·
South Main Street
3
Continue on MO K
3.1 mi
·
5 min
·
MO K
Use the left lane.
4
Continue on MO K
3.4 mi
·
5 min
·
MO K
Use the straight lane.
5
Take the ramp
0.3 mi
·
21 sec
Toward I 64 East, US 40 East, US 61 South
Use the slight right lane.
6
Merge onto I 64; US 40; US 61
3.7 mi
·
4 min
·
Avenue of the Saints
7
Take the exit
0.5 mi
·
57 sec
Exit 14
Toward Chesterfield Airport Road
Use the slight right lane.
8
Continue on Chesterfield Airport Road
361 ft
·
6 sec
·
Chesterfield Airport Road
9
Turn right
211 ft
·
5 sec
Toward 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 roundabout onto MO 109
70 ft
·
1 sec
·
MO 109
13
Continue on MO 109
4.3 mi
·
6 min
·
MO 109
14
Enter roundabout onto MO 109
94 ft
·
2 sec
·
MO 109
15
Continue on MO 109
0.4 mi
·
44 sec
·
MO 109
16
Enter roundabout
76 ft
·
1 sec
Toward MO 100 West: Gray Summit
17
Continue
0.2 mi
·
32 sec
Toward MO 100 West: Gray Summit
18
Merge onto MO 100
13 mi
·
18 min
·
MO 100
19
Take the exit
0.2 mi
·
14 sec
Toward I 44 West, US 50 West: St. Clair
20
Merge onto I 44; US 50
171 mi
·
3 hr 3 min
·
I 44; US 50
Use the straight lane.
21
Take the exit
0.3 mi
·
48 sec
Exit 82A
Toward US 65 South: Branson
22
Merge onto US 65
11 mi
·
13 min
·
Schoolcraft Freeway
Use the straight / slight right lanes.
23
Continue on US 65
11 mi
·
12 min
·
American Legion Memorial Highway
24
Continue on US 65
12 mi
·
13 min
·
US Highway 65
25
Continue on US 65
1.2 mi
·
1 min
·
American Legion Memorial Highway
26
Take the exit
0.2 mi
·
32 sec
Toward US 160: Reed Springs Junction, Forsyth
27
Turn left onto US 160
4.3 mi
·
6 min
·
US 160
28
Turn slight left onto US 160; MO 176
6.0 mi
·
9 min
·
US 160; MO 176
29
Turn slight right onto Rockhill Drive
0.1 mi
·
24 sec
·
Rockhill Drive
30
Arrive at destination
Rockhill Drive
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 125.1 miles from O'Fallon, MO, or about 2h 31m into the drive.
The longest continuous stretch on this route runs about 170.7 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 55 miles or 1h 15m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 125.1 miles or 2h 31m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 58m
Traffic, exits, and arrival timing usually matter more near Forsyth, 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 250.2 miles and 4h 54m.
Your first comfortable stop window is around 55 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.
The longest stretch is on I 44 for about 170.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 125.1 mi from O'Fallon, MO · 2h 31m into the drive
Mid-route town
Meal stop
125 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 55 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 125.1 miles from O'Fallon, MO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 44 if your tank is already low. That segment runs about 170.7 miles.
Arriving in Forsyth, MO
The final approach into Forsyth, 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 Forsyth, MO.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$39.12 one way
$78.23 round trip
$3.97/gal
25.4 MPG avg
88 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $42.95 | $85.90 |
| premium | $4.89 | $48.15 | $96.30 |
| diesel | $5.61 | $55.24 | $110.48 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$39
Meals
$25–$50
Total
$64–$89
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 87.5 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $26 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 75.1 | 0 | $26.27 | $12.01 |
| Efficient EV | 62.6 | 0 | $21.89 | $10.01 |
| EV Truck/SUV | 100.1 | 1 | $35.03 | $16.01 |
Gas CO2
88 kg
EV CO2
29 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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
Forsyth, MO
Afternoon in Forsyth on Thursday
Local time
1:19 PM
CDT
Current temp
76°F
Unavailable
Live forecast
75°F
Cuba, MO
125 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
19 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
4h 54m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
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 Forsyth, MO covers 250.2 miles and takes about 4h 54m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 44, MO 100, American Legion Memorial Highway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 125.1 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 $39.12 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. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 17 significant decision points across 250.2 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 7 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 11 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 19.7 miles: Roundabout - know your exit number before entering.
The route from O'Fallon, MO to Forsyth, MO does not surface many named destination signs beyond the main corridor.
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