Origin
Herculaneum, MO
Morning in Herculaneum on Sunday
Local time
6:37 AM
CDT
Current temp
55°F
Unavailable
Live forecast
Trip from Herculaneum, 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
1h 9m
Distance
54 mi
87 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$8
one way
EV Charging
Unknown
Best Time to Leave
4 AM
1h 4m
★
6 AM
1h 9m
8 AM
1h 21m
10 AM
1h 13m
12 PM
1h 12m
3 PM
1h 14m
5 PM
1h 20m
8 PM
1h 6m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Herculaneum, MO
Wikimedia Commons
O'Fallon, MO
Wikimedia Commons
Trip Overview
Herculaneum, MO to O'Fallon, MO is 54 miles and takes about 1 hour 9 minutes via I-55 and I-70, with a fuel budget near $8 and enough daylight to finish in a day. This drive is a straightforward journey within the Midwest region, connecting two points in Missouri. Expect a predominantly highway-focused experience, making it a practical option for a quick trip or a segment of a longer road adventure. Given its short distance and duration, it’s easily manageable within a single day without feeling rushed.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 270 | 18.1 mi | 22m |
| I 55 | 13.9 mi | 15m |
| I 70 | 13.6 mi | 16m |
| Rosa Parks Highway | 1.3 mi | 1m |
| Commercial Boulevard | 1.3 mi | 2m |
| East Terra Lane | 0.9 mi | 1m |
| Joachim Avenue | 0.6 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 Herculaneum, MO and O'Fallon, MO.
1
Start on this road
56 ft
·
7 sec
·
this road
2
Turn right onto Joachim Avenue
0.6 mi
·
1 min
·
Joachim Avenue
3
At end of road, turn right onto US 61; US 67
1.3 mi
·
2 min
·
Commercial Boulevard
4
Turn left onto MO Z
0.4 mi
·
44 sec
·
MO Z
5
Take the ramp
0.3 mi
·
42 sec
Toward I 55 North: Saint Louis
6
Merge onto I 55
14 mi
·
15 min
·
I 55
7
Continue on I 55
1.3 mi
·
1 min
·
Rosa Parks Highway
8
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.
9
Keep slight left at fork
388 ft
·
8 sec
Toward I 270 West: Kansas City
Use the slight left lane.
10
Continue on this road
0.7 mi
·
1 min
·
this road
Exit 196
Toward I 270 West
11
Merge onto I 270
18 mi
·
22 min
·
I 270
Use the straight lane.
12
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.
13
Keep slight left at fork
0.1 mi
·
11 sec
Toward I 70 West: Kansas City
Use the slight left lane.
14
Continue on this road
0.6 mi
·
57 sec
·
this road
Exit 20B
Toward I 70 West: Kansas City
15
Merge onto I 70
14 mi
·
16 min
·
I 70
Use the straight / slight right lanes.
16
Take the exit
390 ft
·
8 sec
Exit 218
Toward MO K: O'Fallon, Main Street
Use the slight right lane.
17
Turn straight onto East Terra Lane
0.9 mi
·
1 min
·
East Terra Lane
Use the straight lane.
18
Turn right onto South Main Street
0.5 mi
·
1 min
·
South Main Street
19
Turn right
25 ft
·
1 sec
20
Arrive at destination
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
27 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 12 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 27 miles from Herculaneum, 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 155 decision points cluster between mile 17.9 and 52.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
17.9 mi into trip
|
~22m 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
18.2 mi into trip
|
~22m 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
37.1 mi into trip
|
~46m 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
38.2 mi into trip
|
~48m 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
52.5 mi into trip
|
~1h 6m 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
$8.44 one way
$16.88 round trip
$3.97/gal
25.4 MPG avg
19 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $9.27 | $18.54 |
| premium | $4.89 | $10.39 | $20.78 |
| diesel | $5.61 | $11.92 | $23.85 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$8
Estimated CO2 emission: 18.9 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $6 in charging · 0 stops · 68% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 16.2 | 0 | $5.67 | $2.59 |
| Efficient EV | 13.5 | 0 | $4.73 | $2.16 |
| EV Truck/SUV | 21.6 | 0 | $7.56 | $3.46 |
Gas CO2
19 kg
EV CO2
6 kg (68% 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
Morning in O'Fallon on Sunday
Local time
6:37 AM
CDT
Current temp
57°F
Unavailable
Live forecast
80°F
Fenton, MO
27 mi in
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
2 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
1h 9m 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?
This route is heavily focused on highway driving, with 84% of the journey on interstates. You'll spend most of your time on I-270, I-55, and I-70, experiencing a consistent flow typical of major thoroughfares. The longest uninterrupted stretch you'll encounter is approximately 18.1 miles on I-270, offering a period of steady progress. The character of the drive remains largely consistent, emphasizing efficient travel rather than scenic detours.
84% highway — fuel and pacing are the main things to plan.
20 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 55. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 17.9 miles in.
Driving Effort
10/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 54 miles you will encounter 15 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 17.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 18.2 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 37.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
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 Herculaneum, MO and O'Fallon, MO, road signs point toward Chicago, Saint Louis and Saint Louis Lambert International Airport.
Chicago
17.9 mi in
|
~22m
Saint Louis
37.1 mi in
|
~46m
Saint Louis Lambert International Airport
37.1 mi in
|
~46m
About the Cities
Arriving in O'Fallon, MO
Full guide →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.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 9m. Total distance: 54 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 9m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (84%). 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 17.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 18.2 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 37.1 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 and Ste. Geneviève National Historical 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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