Origin
Grain Valley, MO
Late night in Grain Valley on Wednesday
Local time
5:28 AM
CDT
Current temp
48°F
Unavailable
Live forecast
Trip from Grain Valley, MO to O'Fallon, MO
Data updated 0 seconds ago
Drive Time
3h 41m
Distance
194.4 mi
313 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$30
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
3h 29m
★
6 AM
3h 41m
8 AM
4h 7m
10 AM
3h 50m
12 PM
3h 48m
3 PM
3h 51m
5 PM
4h 5m
8 PM
3h 34m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Grain Valley, MO
HONG SON
O'Fallon, MO
Wikimedia Commons
Trip Overview
The drive from Grain Valley, MO to O'Fallon, MO covers 194.4 miles and takes about 3h 41m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Dwight D. Eisenhower Highway, U.S. Submarine Veterans' Memorial Highway, Sheriff Roger I. Wilson Memorial Highway for much of the mileage, and the overall profile is turn-heavy local drive. The longest uninterrupted segment is about 134.8 miles on Dwight D. Eisenhower Highway. At current regular gas prices, budget about $30.39 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
97.2 miles from Grain Valley, MO
A natural place for your longest stop of the day , about 1h 45m into the drive .
Loading map...
Drive Character
Expect a 3h 41m drive with frequent turns across 194.4 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 17 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Dwight D. Eisenhower Highway is the longest continuous segment at about 134.8 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.4 miles in near US 40.
Route Complexity
4/10
Easy - simple navigation with a manageable amount of wheel time
This is a straightforward 3h 41m drive. You will face about 8 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.4 miles (US 40): Multiple destination signs - pick the right one; at 77.5 miles (I 70 / U.S. Submarine Veterans' Memorial Highway): Highway fork - watch signs carefully; at 193.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 8 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
5
0.4 mi into trip
|
~1m in
|
US 40
Take the ramp onto US 40 toward I 70 East, US 40 East: Columbia, Saint Louis
Multiple destination signs - pick the right one
Toward I 70 East, US 40 East: Columbia, Saint L...
4
77.5 mi into trip
|
~1h 24m in
|
I 70 / U.S. Submarine Veterans' Memorial Highway
Keep slight left at fork onto I 70 / U.S. Submarine Veterans' Memorial Highway
Highway fork - watch signs carefully
6
193.4 mi into trip
|
~3h 38m 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.
Toward MO K: O'Fallon
6
193.8 mi into trip
|
~3h 39m in
|
Drennen Parkway
Keep slight right at fork onto Drennen Parkway toward MO K: O'Fallon
Highway fork - watch signs carefully
Toward MO K: O'Fallon
4
194.4 mi into trip
|
~3h 41m in
Turn right
Navigation decision point
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Dwight D. Eisenhower Highway | 134.8 mi | 2h 34m |
| U.S. Submarine Veterans' Memorial Highway | 54.4 mi | 58m |
| Sheriff Roger I. Wilson Memorial Highway | 1.9 mi | 2m |
| Highway Patrol Sgt. Benjamin Booth Memorial Highway | 1.6 mi | 1m |
| South Main Street | 0.6 mi | 1m |
| North Main Street | 0.4 mi | 1m |
| US 40 | 0.2 mi | <1m |
| Drennen Parkway | <0.1 mi | <1m |
Longest stretch:
Dwight D. Eisenhower Highway
— 134.8 mi, about 2h 34m
Turn-by-Turn Driving Directions
Step-by-step road directions between Grain Valley, MO and O'Fallon, MO.
1
Start on West Front Street
98 ft
·
9 sec
·
West Front Street
2
Turn left onto MO AA
0.4 mi
·
1 min
·
North Main Street
3
Take the ramp onto US 40
0.2 mi
·
25 sec
·
US 40
Toward I 70 East, US 40 East: Columbia, Saint Louis
4
Merge onto I 70; US 40
45 mi
·
48 min
·
Dwight D. Eisenhower Highway
5
Continue on I 70; US 40
32 mi
·
34 min
·
U.S. Submarine Veterans' Memorial Highway
6
Keep slight left at fork onto I 70
22 mi
·
24 min
·
U.S. Submarine Veterans' Memorial Highway
7
Continue on I 70; US 40
1.8 mi
·
2 min
·
Dwight D. Eisenhower Highway
8
Continue on I 70; US 40
1.6 mi
·
1 min
·
Highway Patrol Sgt. Benjamin Booth Memorial Highway
9
Continue on I 70; US 40
1.9 mi
·
2 min
·
Sheriff Roger I. Wilson Memorial Highway
10
Continue on I 70; US 40
88 mi
·
1 hr 44 min
·
Dwight D. Eisenhower Highway
Use the straight / slight right lanes.
11
Take the exit
0.3 mi
·
43 sec
Toward MO K: O'Fallon
Use the straight / slight right lanes.
12
Turn straight onto Drennen Parkway
150 ft
·
3 sec
·
Drennen Parkway
Toward MO K: O'Fallon
13
Keep slight right at fork onto Drennen Parkway
166 ft
·
5 sec
·
Drennen Parkway
Toward MO K: O'Fallon
14
Turn slight left
62 ft
·
2 sec
Toward MO K: O'Fallon
15
Continue on South Main Street
0.6 mi
·
1 min
·
South Main Street
16
Turn right
25 ft
·
1 sec
17
Arrive at destination
Trip Plan
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 97.2 miles from Grain Valley, MO, or about 1h 45m into the drive.
The longest continuous stretch on this route runs about 134.8 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 80 miles or 1h 26m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 97.2 miles or 1h 45m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 58m
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 Grain Valley, 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 Grain Valley, MO
This is one driving day of about 194.4 miles and 3h 41m.
Your first comfortable stop window is around 80 miles from Grain Valley, 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 Dwight D. Eisenhower Highway for about 134.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 97.2 mi from Grain Valley, MO · 1h 45m into the drive
Mid-route town
Meal stop
97 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 80 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 97.2 miles from Grain Valley, MO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before Dwight D. Eisenhower Highway if your tank is already low. That segment runs about 134.8 miles.
Arriving in O'Fallon, MO
The final approach into O'Fallon, MO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around O'Fallon, MO.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$30.39 one way
$60.78 round trip
$3.97/gal
25.4 MPG avg
68 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $33.37 | $66.74 |
| premium | $4.89 | $37.41 | $74.82 |
| diesel | $5.61 | $42.92 | $85.84 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$30
Meals
$25–$50
Total
$55–$80
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 68 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $20 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 58.3 | 0 | $20.41 | $9.33 |
| Efficient EV | 48.6 | 0 | $17.01 | $7.78 |
| EV Truck/SUV | 77.8 | 0 | $27.22 | $12.44 |
Gas CO2
68 kg
EV CO2
23 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.
Destination
O'Fallon, MO
Late night in O'Fallon on Wednesday
Local time
5:28 AM
CDT
Current temp
69°F
Partly Cloudy
SW 14 mph
9% chance
Live forecast
75°F
Quincy, IL
97 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
21 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
3h 41m 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.
Frequently Asked Questions
The drive from Grain Valley, MO to O'Fallon, MO covers 194.4 miles and takes about 3h 41m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Dwight D. Eisenhower Highway, U.S. Submarine Veterans' Memorial Highway, Sheriff Roger I. Wilson Memorial Highway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 97.2 miles from Grain Valley, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $30.39 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This is a straightforward 3h 41m drive. You will face about 8 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 0.4 miles (US 40): Multiple destination signs - pick the right one; at 77.5 miles (I 70 / U.S. Submarine Veterans' Memorial Highway): Highway fork - watch signs carefully; at 193.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
The route from Grain Valley, MO to O'Fallon, MO does not surface many named destination signs beyond the main corridor.
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