This 100.7-mile journey from Rolla to O'Fallon is a straightforward trek across the Missouri Midwest, typically taking about 2 hours and 7 minutes behind the wheel. Because of the manageable distance, this route is perfectly suited for a single-day trip, requiring no overnight stays. You can expect to spend approximately $15 on fuel, making it a budget-friendly option for a weekend excursion or a quick commute. The path utilizes a mix of I-44, Manchester Road, and MO K to bridge the gap between these two communities. Whether you are heading out for business or leisure, this drive offers a reliable connection through the heart of the state. It serves as a practical, no-nonsense path that gets you to your destination efficiently without the need for complex travel logistics.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
50.3 miles from Rolla, MO
A natural place for your longest stop of the day
, about 55m into the drive
.
Main Roads
Road
Distance
Duration
I 44
66.3 mi
1h 11m
Manchester Road
13.4 mi
18m
MO K
6.3 mi
11m
MO 109
4.9 mi
7m
Avenue of the Saints
3.1 mi
3m
South Eatherton Road
2.4 mi
4m
Olive Street Road
0.9 mi
1m
Chesterfield Airport Road
0.7 mi
1m
Longest stretch:
I 44
— 66.3 mi, about 1h 11m
Turn-by-Turn Driving Directions
Step-by-step road directions between Rolla, MO and O'Fallon, MO.
1
Start on MO BB
88 ft·7 sec·West 10th Street
2
Turn right onto North Pine Street
0.6 mi·1 min·North Pine Street
Use the right lane.
3
Turn right onto I 44 Business; US Historic 66; US 63
0.3 mi·37 sec·North Bishop Avenue
Use the straight / right lanes.
4
Take the exit
0.2 mi·23 sec
Toward I 44 East: Saint LouisUse the straight / slight right lanes.
5
Merge onto I 44
66 mi·1 hr 11 min·I 44
6
Take the exit
0.2 mi·27 sec
Exit 253Toward I 44 Business, MO 100 East: Gray SummitUse the slight right lane.
7
Turn left onto MO 100
13 mi·18 min·Manchester Road
Use the straight lane.
8
Take the exit
0.2 mi·30 sec
Toward MO 109
9
Enter roundabout onto MO 109
224 ft·4 sec·MO 109
10
Continue on MO 109
515 ft·10 sec·MO 109
11
Enter roundabout onto MO 109
98 ft·1 sec·MO 109
12
Continue on MO 109
0.4 mi·45 sec·MO 109
13
Enter roundabout onto MO 109
94 ft·2 sec·MO 109
14
Continue on MO 109
4.3 mi·6 min·MO 109
15
Enter roundabout onto South Eatherton Road
94 ft·1 sec·South Eatherton Road
16
Continue on South Eatherton Road
2.4 mi·4 min·South Eatherton Road
17
Continue on Olive Street Road
0.9 mi·1 min·Olive Street Road
18
Take the ramp onto Chesterfield Airport Road
0.7 mi·1 min·Chesterfield Airport Road
19
Merge onto I 64; US 40; US 61
3.1 mi·3 min·Avenue of the Saints
Use the straight lane.
20
Take the exit
327 ft·6 sec
Exit 9Toward MO K: O'FallonUse the straight / slight right lanes.
21
Merge onto North Outer Road
0.3 mi·31 sec·North Outer Road
22
Continue on North Outer Road
0.2 mi·17 sec·North Outer Road
23
Turn right onto MO K
3.3 mi·5 min·MO K
24
Continue on MO K
1.5 mi·2 min·MO K
Use the right lane.
25
Continue on MO K
1.6 mi·3 min·MO K
Use the right lane.
26
Continue on South Main Street
0.6 mi·1 min·South Main Street
27
Turn right
25 ft·1 sec
28
Arrive at destination
Trip Plan
Since this is a relatively short drive of just over two hours, you have plenty of flexibility regarding your departure time. You won't need to worry about planning complex rest stops along the way, as you can easily complete the trip in one go. Aim to check your fuel levels before leaving Rolla, as the $15 estimate assumes a direct route without excessive idling or detours. Given the heavy reliance on I-44, keep an eye on real-time traffic reports to anticipate any potential congestion that might impact your 2-hour and 7-minute travel window. Using this high percentage of highway travel as your primary guide, you can confidently plan your departure for a time that avoids peak rush-hour volume to ensure the smoothest possible transition into O'Fallon.
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 50.3 miles from Rolla, MO, or about 55m into the drive.
The longest continuous stretch on this route runs about 66.3 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 22 miles or 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 50.3 miles or 55m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 36m
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 Rolla, 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 Rolla, MO
This is one driving day of about 100.7 miles and 2h 7m.
Your first comfortable stop window is around 22 miles from Rolla, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on I 44 for about 66.3 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 16
5 decision points cluster between mile 0 and 93.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0 mi into trip|~0m in|North Pine Street
Turn right onto North Pine Street
Lane positioning matters here
Use the right lane.
5
0.6 mi into trip|~2m in|I 44 Business; US Historic 66; US 63 / North Bishop Avenue
Turn right onto I 44 Business; US Historic 66; US 63 / North Bishop Avenue
Lane positioning matters here
Use the straight / right lanes.
7
0.8 mi into trip|~2m in
Take the exit toward I 44 East: Saint Louis
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 44 East: Saint Louis
8
67.4 mi into trip|~1h 14m in
Take the exit toward I 44 Business, MO 100 East: Gray Summit
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 253
Toward I 44 Business, MO 100 East: Gray Summit
7
93.2 mi into trip|~1h 53m in
Take the exit toward MO K: O'Fallon
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 9
Toward MO K: O'Fallon
Fuel & Cost
Regular Gas
$15.74 one way
$31.49 round trip
$3.97/gal25.4 MPG avg35 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$17.29
$34.57
premium
$4.89
$19.38
$38.76
diesel
$5.61
$22.23
$44.47
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$16
Meals
$25–$50
Total
$41–$66
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 35.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $11 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
30.2
0
$10.57
$4.83
Efficient EV
25.2
0
$8.81
$4.03
EV Truck/SUV
40.3
0
$14.10
$6.44
Gas CO2
35 kg
EV CO2
12 kg (66% 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 12, 2026
Origin
Rolla, MO
Late night
in Rolla on Sunday
Local time
2:27 AM
CDT
Current temp
63°F
Mostly Cloudy
S 10 mph5% chanceLive forecast
Special Weather Statement
Special Weather Statement issued April 12 at 12:21AM CDT by NWS Paducah KY
Flood Warning
Flood Warning issued April 11 at 9:46PM CDT until April 18 at 1:00PM CDT by NWS St Louis MO
Destination
O'Fallon, MO
Late night
in O'Fallon on Sunday
Local time
2:27 AM
CDT
Current temp
57°F
Unavailable
Live forecast
75°F
Wildwood, MO
50 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
6 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
2h 7m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
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.
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...
25 mi from route
~63 min detour
$19
near mile 83.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a highway-focused experience, as 71% of this 100.7-mile route is comprised of interstate travel. You will spend the bulk of your time on I-44, which features a long, uninterrupted 66.3-mile stretch that allows for steady cruising. As you transition away from the main interstate onto Manchester Road and MO K, the character of the drive shifts from high-speed transit to more localized road conditions. This combination keeps the drive from feeling like a monotonous grind, offering a transition from major arterial roads to secondary state routes. You will find that the road conditions remain consistent as you move through the Missouri landscape, providing a predictable rhythm for your two-hour commute.
71% 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: 66.3 mi on I 44.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on I 44 and Manchester Road. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near North Pine Street.
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 16 significant decision points across 100.7 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: near the start (North Pine Street): Lane positioning matters here; at 0.6 miles (I 44 Business; US Historic 66; US 63 / North Bishop Avenue): Lane positioning matters here; at 0.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Elevation Profile
Mostly flat terrain
1,172 ft629 ft
Total Climb
273 ft
Total Descent
670 ft
Highest Point
1,172 ft
~4.2 mi in
Elevation Range
543 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Rolla, MO to O'Fallon, MO, road signs begin pointing toward Mo K: O'fallon along the way.
Mo K: O'fallon
93.2 mi in|~1h 53m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 7m. Total distance: 100.7 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
2h 7m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (71%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 66.3 miles on I 44. The full list of main roads is in the Roads section above.
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 O'Fallon, 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. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: near the start (North Pine Street): Lane positioning matters here; at 0.6 miles (I 44 Business; US Historic 66; US 63 / North Bishop Avenue): Lane positioning matters here; at 0.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes — Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at O'Fallon, MO before heading back.
