Origin
Arnold, MO
Night in Arnold on Saturday
Local time
11:14 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from Arnold, 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
54m
Distance
41.5 mi
67 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$6
one way
EV Charging
Good
6 stations
Best Time to Leave
4 AM
0h 50m
★
6 AM
0h 55m
8 AM
1h 4m
10 AM
0h 58m
12 PM
0h 57m
3 PM
0h 58m
5 PM
1h 3m
8 PM
0h 52m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Arnold, MO
Wikimedia Commons
O'Fallon, MO
Wikimedia Commons
Trip Overview
Spanning 41.6 miles across the Missouri Midwest, this drive connects Arnold to O'Fallon in approximately 43 minutes. Because of the quick transit time, it is perfectly suited for a single-day round trip, meaning you won't need to book an overnight stay. You should budget about $6 for fuel to cover the distance comfortably. Navigating this route involves transitioning between I-55 North, the Police Officer Steven Jarvis Memorial Highway, and Officer Thomas G. While the trip is relatively short, the route requires constant attention due to its turn-heavy local nature. It is a straightforward commute for those traveling within the region, offering a practical way to reach your destination without significant travel fatigue.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 270 | 18.1 mi | 22m |
| I 70 | 13.6 mi | 16m |
| Officer Thomas G. Smith, Jr. Memorial Highway | 1.9 mi | 2m |
| Rosa Parks Highway | 1.3 mi | 1m |
| East Terra Lane | 0.9 mi | 1m |
| Jeffco Boulevard | 0.9 mi | 1m |
| Police Officer Steven Jarvis Memorial Highway | 0.9 mi | 1m |
| South Main Street | 0.5 mi | 1m |
Longest stretch:
I 270
— 18.1 mi, about 22m
Turn-by-Turn Driving Directions
Step-by-step road directions between Arnold, MO and O'Fallon, MO.
1
Start on US 61; US 67
0.9 mi
·
1 min
·
Jeffco Boulevard
Use the left lane.
2
Turn left onto MO 141
0.2 mi
·
27 sec
·
MO 141
Use the left lane.
3
Take the ramp
0.2 mi
·
30 sec
Toward I 55 North
4
Merge onto I 55
0.9 mi
·
1 min
·
Police Officer Steven Jarvis Memorial Highway
5
Continue on I 55
1.9 mi
·
2 min
·
Officer Thomas G. Smith, Jr. Memorial Highway
6
Continue on I 55
1.3 mi
·
1 min
·
Rosa Parks Highway
7
Take the exit
0.2 mi
·
27 sec
Exit 196
Toward I 270 West, I 255 East: Kansas City, Chicago
Use the slight right lane.
8
Keep slight left at fork
388 ft
·
8 sec
Toward I 270 West: Kansas City
Use the slight left lane.
9
Continue on this road
0.7 mi
·
1 min
·
this road
Exit 196
Toward I 270 West
10
Merge onto I 270
18 mi
·
22 min
·
I 270
Use the straight lane.
11
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.
12
Keep slight left at fork
0.1 mi
·
11 sec
Toward I 70 West: Kansas City
Use the slight left lane.
13
Continue on this road
0.6 mi
·
57 sec
·
this road
Exit 20B
Toward I 70 West: Kansas City
14
Merge onto I 70
14 mi
·
16 min
·
I 70
Use the straight / slight right lanes.
15
Take the exit
390 ft
·
8 sec
Exit 218
Toward MO K: O'Fallon, Main Street
Use the slight right lane.
16
Turn straight onto East Terra Lane
0.9 mi
·
1 min
·
East Terra Lane
Use the straight lane.
17
Turn right onto South Main Street
0.5 mi
·
1 min
·
South Main Street
18
Turn right
25 ft
·
1 sec
19
Arrive at destination
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
21 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 41.5 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 20.8 miles from Arnold, MO, which is a good place for a longer meal and fuel stop.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 145 decision points cluster between mile 5.5 and 40 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
5.5 mi into trip
|
~7m in
Take the exit toward I 270 West, I 255 East: Kansas City, Chicago
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 196
Toward I 270 West, I 255 East: Kansas City, Chi...
8
5.7 mi into trip
|
~8m in
Keep slight left at fork toward I 270 West: Kansas City
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward I 270 West: Kansas City
8
24.7 mi into trip
|
~32m 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
25.7 mi into trip
|
~33m 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
8
40 mi into trip
|
~51m 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
$6.49 one way
$12.98 round trip
$3.97/gal
25.4 MPG avg
15 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $7.12 | $14.25 |
| premium | $4.89 | $7.99 | $15.97 |
| diesel | $5.61 | $9.16 | $18.33 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$6
Estimated CO2 emission: 14.5 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $4 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 12.5 | 0 | $4.36 | $1.99 |
| Efficient EV | 10.4 | 0 | $3.63 | $1.66 |
| EV Truck/SUV | 16.6 | 0 | $5.81 | $2.66 |
Gas CO2
15 kg
EV CO2
5 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
O'Fallon, MO
Night in O'Fallon on Saturday
Local time
11:14 PM
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
54m 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 turn-heavy experience behind the wheel rather than a long, monotonous interstate cruise. Since the highway share is 0 percent, you will spend the entire 43-minute duration navigating local roads and specific memorial highways. This lack of sustained high-speed interstate stretches means the pace is dictated by local infrastructure and traffic flow. You won't find a singular, long, uninterrupted stretch here; instead, the route demands consistent engagement as you transition through the various segments. It is best to approach this drive as a series of connected local segments that require active navigation throughout the 41.6-mile journey.
77% highway — fuel and pacing are the main things to plan.
19 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 18.1 mi on I 270.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on I 270 and I 70. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 5.5 miles in.
Driving Effort
10/10
Focused - lots of decisions in a short distance, but it is over quickly
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 14 decision points packed into just 41.5 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 54m.
Where does it get tricky?
The main spots that need attention: at 5.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 5.7 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 24.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
651 ft
437 ft
Total Climb
563 ft
Total Descent
620 ft
Highest Point
651 ft
~17.3 mi in
Elevation Range
214 ft
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 Arnold, MO and O'Fallon, MO, road signs point toward Chicago, Saint Louis and Saint Louis Lambert International Airport.
Chicago
5.5 mi in
|
~7m
Saint Louis
24.7 mi in
|
~32m
Saint Louis Lambert International Airport
24.7 mi in
|
~32m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 54m. Total distance: 41.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
54m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (77%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 18.1 miles on I 270. 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 5.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 5.7 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 24.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
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, USGS 3DEP for elevation, and NPS for national parks. See our methodology for refresh cadence and limitations.
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