Origin
Rock Hill, MO
Late night in Rock Hill on Sunday
Local time
2:44 AM
CDT
Current temp
83°F
Unavailable
Live forecast
Trip from Rock Hill, MO to O'Fallon, MO
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
42m
Distance
29.8 mi
48 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$5
one way
EV Charging
Good
6 stations
Best Time to Leave
4 AM
0h 39m
★
6 AM
0h 42m
8 AM
0h 49m
10 AM
0h 45m
12 PM
0h 44m
3 PM
0h 45m
5 PM
0h 49m
8 PM
0h 40m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Rock Hill, MO
Fahad Puthawala
O'Fallon, MO
Wikimedia Commons
Trip Overview
This 29.8-mile drive from Rock Hill to O'Fallon, Missouri, is a straightforward journey that can easily be completed in about 42 minutes. Designed as a single-day trip, it's perfect for a quick commute or an afternoon excursion. The route is primarily highway-focused, with about 74% of the drive utilizing major interstates. You can expect a fuel cost of around $5 for this trip. Since both your origin and destination are within the Midwest region of Missouri, you won't encounter significant regional landscape changes. This makes it a practical and efficient drive for getting between these two points.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 13.6 mi | 16m |
| I 270 | 8.6 mi | 10m |
| Manchester Road | 4 mi | 8m |
| East Terra Lane | 0.9 mi | 1m |
| South Main Street | 0.5 mi | 1m |
| Bluebell Lane | 0.2 mi | <1m |
Longest stretch:
I 70
— 13.6 mi, about 16m
Turn-by-Turn Driving Directions
Step-by-step road directions between Rock Hill, MO and O'Fallon, MO.
1
Start on Bluebell Lane
0.2 mi
·
39 sec
·
Bluebell Lane
2
Turn right onto MO 100
4.0 mi
·
8 min
·
Manchester Road
3
Take the ramp
0.2 mi
·
14 sec
Toward I 270 North
4
Merge onto I 270
8.6 mi
·
10 min
·
I 270
Use the straight lane.
5
Take the exit
1.0 mi
·
1 min
Exit 20A
Toward I 70: Kansas City, Saint Louis, Saint Louis Lambert International Airport
Use the slight right lane.
6
Keep slight left at fork
0.1 mi
·
11 sec
Toward I 70 West: Kansas City
Use the slight left lane.
7
Continue on this road
0.6 mi
·
57 sec
·
this road
Exit 20B
Toward I 70 West: Kansas City
8
Merge onto I 70
14 mi
·
16 min
·
I 70
Use the straight / slight right lanes.
9
Take the exit
390 ft
·
8 sec
Exit 218
Toward MO K: O'Fallon, Main Street
Use the slight right lane.
10
Turn straight onto East Terra Lane
0.9 mi
·
1 min
·
East Terra Lane
Use the straight lane.
11
Turn right onto South Main Street
0.5 mi
·
1 min
·
South Main Street
12
Turn right
25 ft
·
1 sec
13
Arrive at destination
Heads-up: tricky spots
5 of 105 decision points cluster between mile 4.3 and 28.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
4.3 mi into trip
|
~8m in
|
I 270
Merge onto I 270
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
8
12.9 mi into trip
|
~19m 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
14 mi into trip
|
~20m 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
5
14.7 mi into trip
|
~22m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
8
28.3 mi into trip
|
~39m 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
Fuel & Cost
Regular Gas
$4.66 one way
$9.32 round trip
$3.97/gal
25.4 MPG avg
10 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $5.12 | $10.23 |
| premium | $4.89 | $5.73 | $11.47 |
| diesel | $5.61 | $6.58 | $13.16 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$5
Estimated CO2 emission: 10.4 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $3 in charging · 0 stops · 70% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 8.9 | 0 | $3.13 | $1.43 |
| Efficient EV | 7.5 | 0 | $2.61 | $1.19 |
| EV Truck/SUV | 11.9 | 0 | $4.17 | $1.91 |
Gas CO2
10 kg
EV CO2
3 kg (70% 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
O'Fallon, MO
Late night in O'Fallon on Sunday
Local time
2:44 AM
CDT
Current temp
57°F
Unavailable
Live forecast
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
26 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
42m 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.
What kind of drive is this?
Expect a highway-focused experience for most of this 42-minute trip. The route predominantly uses I-70 and I-270, making up 74% of the total mileage. You'll encounter a longest stretch of 13.6 miles on I-70, offering a period of consistent, faster-paced driving. While Manchester Road is part of the journey, the overall profile leans heavily towards interstate travel, suggesting a smooth, albeit potentially less varied, driving experience. This character means you'll likely be navigating at highway speeds for the majority of the 29.8 miles.
74% highway — fuel and pacing are the main things to plan.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 13.6 mi on I 70.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 70 and I 270. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 4.3 miles in near I 270.
Driving Effort
8/10
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 10 decision points packed into just 29.8 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 42m.
Where does it get tricky?
The main spots that need attention: at 4.3 miles (I 270): Merge point - match speed before joining. Lane positioning matters here; at 12.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 14 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Rock Hill, MO and O'Fallon, MO, road signs point toward Saint Louis, Saint Louis Lambert International Airport and Mo K: O'fallon.
Saint Louis
12.9 mi in
|
~19m
Saint Louis Lambert International Airport
12.9 mi in
|
~19m
Mo K: O'fallon
28.3 mi in
|
~39m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 42m. Total distance: 29.8 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
42m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (74%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 13.6 miles on I 70. 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.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: at 4.3 miles (I 270): Merge point - match speed before joining. Lane positioning matters here; at 12.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 14 miles: Highway fork - watch signs carefully. 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.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
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