Portageville, MO to O'Fallon, MO is 200.4 miles and takes about 3h 44m via I 55 and I 270, with a fuel budget near $31 and enough daylight to finish in a day. This highway-focused drive keeps you firmly within the Midwest region as you travel from one Missouri destination to another. It's a straightforward trip, primarily utilizing interstates, making it a practical choice for getting from point A to point B efficiently. If you're looking for a quick, no-fuss journey with a clear path, this route should fit the bill.
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
100.2 miles from Portageville, MO
A natural place for your longest stop of the day
, about 1h 48m into the drive
.
Main Roads
Road
Distance
Duration
I 55
162 mi
2h 54m
I 270
18.1 mi
22m
I 70
13.6 mi
16m
Rosa Parks Highway
1.3 mi
1m
East Terra Lane
0.9 mi
1m
US 61
0.7 mi
1m
South Main Street
0.5 mi
1m
Main Street
0.2 mi
<1m
Longest stretch:
I 55
— 162 mi, about 2h 54m
Turn-by-Turn Driving Directions
Step-by-step road directions between Portageville, MO and O'Fallon, MO.
1
Start on Main Street
0.2 mi·23 sec·Main Street
2
Continue on US 61; MO 162
0.7 mi·1 min·US 61; MO 162
3
Take the ramp
0.2 mi·24 sec
Toward I 55 North: Sikeston
4
Merge onto I 55
60 mi·1 hr 4 min·I 55
5
Keep slight left at fork onto I 55
102 mi·1 hr 49 min·I 55
6
Continue on I 55
1.3 mi·1 min·Rosa Parks Highway
7
Take the exit
0.2 mi·27 sec
Exit 196Toward I 270 West, I 255 East: Kansas City, ChicagoUse the slight right lane.
8
Keep slight left at fork
388 ft·8 sec
Toward I 270 West: Kansas CityUse the slight left lane.
9
Continue on this road
0.7 mi·1 min·this road
Exit 196Toward 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 20AToward I 70: Kansas City, Saint Louis, Saint Louis Lambert International AirportUse the slight right lane.
12
Keep slight left at fork
0.1 mi·11 sec
Toward I 70 West: Kansas CityUse the slight left lane.
13
Continue on this road
0.6 mi·57 sec·this road
Exit 20BToward 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 218Toward MO K: O'Fallon, Main StreetUse 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
Trip Plan
Given the relatively short 3h 44m duration and 200.4-mile distance, this is easily a single-day trip. You could depart anytime in the morning and still arrive with plenty of daylight. With the bulk of the drive on I 55, plan your fuel stops accordingly, as services can be more spread out on stretches of interstate. There's only one recommended stop, so if you need to break up the drive, consider doing so around the halfway point or when you feel the need for a break. Since it's a short drive, you have the flexibility to adjust your departure time based on your schedule.
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 100.2 miles from Portageville, MO, or about 1h 48m into the drive.
The longest continuous stretch on this route runs about 162 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 44 miles or 47m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 100.2 miles or 1h 48m 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 57m
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 Portageville, 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 Portageville, MO
This is one driving day of about 200.4 miles and 3h 44m.
Your first comfortable stop window is around 44 miles from Portageville, 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 I 55 for about 162 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
The midpoint is around 100.2 miles from Portageville, MO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before I 55 if your tank is already low. That segment runs about 162 miles.
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 13
5 decision points cluster between mile 164.3 and 198.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
164.3 mi into trip|~2h 57m 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
164.6 mi into trip|~2h 58m 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
183.5 mi into trip|~3h 22m 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
184.6 mi into trip|~3h 23m 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
198.9 mi into trip|~3h 41m 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
$31.33 one way
$62.66 round trip
$3.97/gal25.4 MPG avg70 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$34.40
$68.80
premium
$4.89
$38.57
$77.13
diesel
$5.61
$44.25
$88.49
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$31
Meals
$25–$50
Total
$56–$81
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 70.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $21 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
60.1
0
$21.04
$9.62
Efficient EV
50.1
0
$17.54
$8.02
EV Truck/SUV
80.2
1
$28.06
$12.83
Gas CO2
70 kg
EV CO2
23 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.
Forecast as of Apr 18, 2026
Origin
Portageville, MO
Late night
in Portageville on Sunday
Local time
4:57 AM
CDT
Current temp
56°F
Chance Showers And Thunderstorms
WSW 15 mph81% chanceLive forecast
Flood Warning
Flood Warning issued April 18 at 2:07AM CDT until April 19 at 5:30PM CDT by NWS Springfield MO
Flood Warning
Flood Warning issued April 18 at 2:03AM CDT until April 18 at 10:45AM CDT by NWS Springfield MO
Destination
O'Fallon, MO
Late night
in O'Fallon on Sunday
Local time
4:57 AM
CDT
Current temp
46°F
Rain Showers
NW 10 to 15 mph97% chanceLive forecast
Flood Warning
Flood Warning issued April 18 at 2:07AM CDT until April 19 at 5:30PM CDT by NWS Springfield MO
Flood Warning
Flood Warning issued April 18 at 2:03AM CDT until April 18 at 10:45AM CDT by NWS Springfield MO
57°F
Arnold, MO
100 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
10 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
3h 44m 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.
Ste. Geneviève National Historical Park
National Historical Park
Established by 1750, Ste. Geneviève was the first permanent European settlement in Missouri. Early French Canadian settlers were drawn here by the rich agricultural land known as Le Grand Champ (the B...
5 mi from route
~13 min detour
Free
near mile 117.7
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...
12 mi from route
~30 min detour
$19
near mile 166.2
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 drive for this trip, with 97% of the journey on major interstates. You'll be on I 55 for the longest uninterrupted stretch of 162 miles, offering a consistent pace. The route is largely defined by these high-speed corridors, meaning you'll experience a steady, uninterrupted flow for most of the 3h 44m drive. The character is less about winding roads and more about covering ground efficiently on well-maintained interstate highways.
97% 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: 162 mi on I 55.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on I 55 and I 270. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 164.3 miles in.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 13 significant decision points across 200.4 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: at 164.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 164.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 183.5 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.
Between Portageville, MO and O'Fallon, MO, road signs point toward Chicago, Saint Louis and Saint Louis Lambert International Airport.
Chicago
164.3 mi in|~2h 57m
Saint Louis
183.5 mi in|~3h 22m
Saint Louis Lambert International Airport
183.5 mi in|~3h 22m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 44m. Total distance: 200.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 44m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (97%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 162 miles on I 55. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
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. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 164.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 164.6 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 183.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Ste. Geneviève National Historical Park and Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 3.7 hours each way, an in-and-out day trip would put you behind the wheel for 7.5 hours — manageable with a long break at O'Fallon, MO, but most travelers stay overnight.
