O'Fallon, MO to Ozark, MO is 221.8 miles and takes about 4h 20m via I 44, with a fuel budget near $39 and enough daylight to finish in a day. This trip stays within the Midwest, connecting two points in Missouri. The profile is mostly highway, making it a straightforward drive. With a recommended one-day trip, you'll spend most of your time on the interstate, so plan for typical highway amenities along the way.
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
110.9 miles from O'Fallon, MO
A natural place for your longest stop of the day
, about 2h 16m into the drive
.
Main Roads
Road
Distance
Duration
I 44
170.7 mi
3h 3m
MO 100
13.3 mi
18m
Schoolcraft Freeway
11 mi
13m
MO K
6.5 mi
11m
MO 109
4.7 mi
7m
American Legion Memorial Highway
4.6 mi
5m
Avenue of the Saints
3.7 mi
4m
North Eatherton Road
2.4 mi
4m
Longest stretch:
I 44
— 170.7 mi, about 3h 3m
Traffic on I-44
Hour-of-day weekday pattern from 8 FHWA count stations on your route.
Peak
4 PM
~1,432 veh/hr typical
· worst 1,709
Quietest
2 AM
~177 veh/hr
Peak-to-quiet ratio
8.1×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Ozark, 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 SouthUse 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 14Toward Chesterfield Airport RoadUse 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 82AToward 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
4.6 mi·5 min·American Legion Memorial Highway
24
Take the exit onto US 65 Business
0.2 mi·33 sec·US 65 Business
Toward US 65 Busienss, MO 14: Nixa
25
Turn left onto US 65 Bus; MO 14
0.1 mi·24 sec·West Jackson Road
26
Continue on US 65 Bus; MO 14
1.4 mi·3 min·Jackson Street
27
Turn left onto West Church Street
97 ft·4 sec·West Church Street
28
Arrive at destination
West Church Street
Trip Plan
To make the most of this 4h 20m drive, consider leaving O'Fallon in the morning to arrive in Ozark with plenty of daylight. The route is efficient, allowing for flexibility with stops, but keep in mind the longest stretch without exits is over 170 miles on I 44. You'll want to refuel before embarking on that segment. With a fuel cost estimated at $39, it's a budget-friendly trip, but always check current prices. This drive is easily manageable in a single day, so you can decide on your stopping pace as you go.
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 110.9 miles from O'Fallon, MO, or about 2h 16m 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 49 miles or 1h 9m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 110.9 miles or 2h 16m 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 32m
Traffic, exits, and arrival timing usually matter more near Ozark, 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 221.8 miles and 4h 20m.
Your first comfortable stop window is around 49 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.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 18
5 decision points cluster between mile 7 and 33.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
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.
Fuel & Cost
Regular Gas
$32.75 one way
$65.51 round trip
$3.75/gal25.4 MPG avg78 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$36.16
$72.32
premium
$4.72
$41.18
$82.36
diesel
$4.80
$41.88
$83.76
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$33
Meals
$25–$50
Total
$58–$83
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 77.6 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $23 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
66.5
0
$23.29
$10.65
Efficient EV
55.5
0
$19.41
$8.87
EV Truck/SUV
88.7
1
$31.05
$14.20
Gas CO2
78 kg
EV CO2
26 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.
Forecast as of Jul 18, 2026
Origin
O'Fallon, MO
Late night
in O'Fallon on Sunday
Local time
5:49 AM
CDT
Current temp
94°F
Slight Chance Showers And Thunderstorms
W 8 mph21% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 3:26PM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Heat Advisory
Heat Advisory issued July 18 at 12:07PM CDT until July 18 at 8:00PM CDT by NWS Memphis TN
Destination
Ozark, MO
Late night
in Ozark on Sunday
Local time
5:49 AM
CDT
Current temp
90°F
Slight Chance Showers And Thunderstorms
SW 10 mph19% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 3:26PM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Heat Advisory
Heat Advisory issued July 18 at 12:07PM CDT until July 18 at 8:00PM CDT by NWS Memphis TN
89°F
Cuba, MO
111 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
4 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
4h 20m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Wilson's Creek National Battlefield
National Battlefield
Wilson's Creek was the first major Civil War battle fought west of the Mississippi River, and where the first Union general was killed in action. The costly Southern victory on August 10, 1861, focuse...
10 mi from route
~24 min detour
Free
near mile 214.2
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...
26 mi from route
~65 min detour
$19
near mile 15.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll be on the highway for about 90% of this 221.8-mile drive. The longest continuous stretch on I 44 spans 170.7 miles, offering uninterrupted cruising. Expect the transition to surface roads, primarily MO 100 and Schoolcraft Freeway, towards the end of your trip. The dense exit ramps on I 44 mean frequent opportunities for services or potential slowdowns.
90% highway — fuel and pacing are the main things to plan.
28 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 170.7 mi on I 44.
How Hard Is This Drive?
7/10
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 Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 18 significant decision points across 221.8 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.
St. Charles, Missouri is outside of St. Louis on the bank of the Missouri River. It was Missouri's first state capital and was one of the first stops by Lewis and Clark on their journey to explore Louisiana Territory. The historic Main Street has largely been restored to its 1812-era appearance including gas lights a boardwalk and is lined with shops selling artwork, handicrafts, home decorations, antiques. There are also many restaurants.
Doable as a same-day drive at 4h 20m. Total distance: 221.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 20m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (90%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 170.7 miles on I 44. The full list of main roads is in the Roads section above.
Yes — we found about 19 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Ozark, MO before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 19 rest areas along the route for bathroom stops.
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.
Yes — Wilson's Creek National Battlefield and Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.3 hours each way, an in-and-out day trip would put you behind the wheel for 8.7 hours — manageable with a long break at Ozark, MO, but most travelers stay overnight.
