Origin
O'Fallon, MO
Evening in O'Fallon on Thursday
Local time
7:00 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Saint George, MO
Last recalculated Apr 17, 2026
Drive Time
51m
Distance
38.8 mi
62 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$6
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 47m
★
6 AM
0h 52m
8 AM
1h 0m
10 AM
0h 55m
12 PM
0h 54m
3 PM
0h 55m
5 PM
1h 0m
8 PM
0h 49m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
O'Fallon, MO
Wikimedia Commons
Saint George, MO
Enes Ersahin
Trip Overview
The drive from O'Fallon, MO to Saint George, MO covers 38.8 miles and takes about 51m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 270, I 70, I 55 for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 19 miles on I 270. At current regular gas prices, budget about $6.07 one way before food or hotel costs.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 51m. Total distance: 38.8 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
51m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (90%). Some complex stretches to watch for.
Drive Character
This is a 51m highway drive covering 38.8 miles, with most of the trip on I 270 and I 70. The longest continuous stretch is about 19 miles on I 270.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 19 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 270 is the longest continuous segment at about 19 miles.
How Hard Is This Drive?
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 15.1 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 16 decision points packed into just 38.8 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 51m.
Where does it get tricky?
The main spots that need attention: at 15.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 15.2 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 34.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 16 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
8
15.1 mi into trip
|
~20m in
Take the exit toward I 270: Chicago, Memphis
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 232
Toward I 270: Chicago, Memphis
7
15.2 mi into trip
|
~20m in
Keep slight right at fork toward I 270 South: Memphis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 270 South: Memphis
8
34.8 mi into trip
|
~44m in
Take the exit toward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry Road
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 1A
Toward I 55, US 61, US 67: Saint Louis, Memphis...
8
35.4 mi into trip
|
~45m in
Keep slight right at fork toward I 55 North: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Exit 1A
Toward I 55 North: Saint Louis
7
36.1 mi into trip
|
~47m in
Keep slight right at fork toward I 55 North: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 55 North: Saint Louis
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from O'Fallon, MO to Saint George, MO, road signs begin pointing toward Memphis along the way.
Memphis
15.1 mi in
|
~20m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 270 | 19 mi | 23m |
| I 70 | 13.5 mi | 16m |
| I 55 | 1.6 mi | 2m |
| Drennen Parkway | 0.9 mi | 1m |
| South Main Street | 0.6 mi | 1m |
| Reavis Barracks Road | 0.3 mi | <1m |
| Huntingdon Lane | <0.1 mi | <1m |
Longest stretch:
I 270
— 19 mi, about 23m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Saint George, MO.
1
Start on this road
25 ft
·
7 sec
·
this road
2
Turn left onto South Main Street
0.6 mi
·
1 min
·
South Main Street
3
Turn left onto Drennen Parkway
0.9 mi
·
1 min
·
Drennen Parkway
Use the left lane.
4
Take the ramp
438 ft
·
6 sec
Toward I 70 East: Saint Louis
Use the slight left lane.
5
Merge onto I 70
14 mi
·
16 min
·
I 70
Use the straight / slight right lanes.
6
Take the exit
0.2 mi
·
12 sec
Exit 232
Toward I 270: Chicago, Memphis
Use the slight right lane.
7
Keep slight right at fork
0.4 mi
·
33 sec
Toward I 270 South: Memphis
Use the slight right lane.
8
Continue on this road
0.1 mi
·
10 sec
·
this road
Exit 232
Toward I 270 South: Memphis
9
Merge onto I 270
19 mi
·
23 min
·
I 270
Use the straight lane.
10
Take the exit
0.4 mi
·
27 sec
Exit 1A
Toward I 55, US 61, US 67: Saint Louis, Memphis, Lemay Ferry Road
Use the straight / slight right lanes.
11
Keep slight left at fork
0.1 mi
·
7 sec
Toward I 55 North, US 61, US 67: Saint Louis
12
Continue on this road
0.2 mi
·
11 sec
·
this road
Exit 1A
Toward I 55 North, US 61, US 67: Saint Louis
13
Keep slight right at fork
0.7 mi
·
1 min
Exit 1A
Toward I 55 North: Saint Louis
Use the slight right lane.
14
Keep slight right at fork
0.5 mi
·
52 sec
Toward I 55 North: Saint Louis
Use the slight right lane.
15
Merge onto I 55
1.6 mi
·
2 min
·
I 55
16
Take the exit
0.1 mi
·
23 sec
Exit 199
Toward Reavis Barracks Road
Use the slight right lane.
17
Turn left onto Reavis Barracks Road
0.3 mi
·
44 sec
·
Reavis Barracks Road
18
Turn right onto Huntingdon Lane
422 ft
·
14 sec
·
Huntingdon Lane
19
Arrive at destination
Huntingdon Lane
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 19.4 mi from O'Fallon, MO · 25m into the drive
Mid-route town
Meal stop
19 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 38.8 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 19.4 miles from O'Fallon, MO, which is a good place for a longer meal and fuel stop.
Arriving in Saint George, MO
Allow a few extra minutes for the final approach into Saint George, MO if you are unfamiliar with the area.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$6.07 one way
$12.13 round trip
$3.97/gal
25.4 MPG avg
14 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $6.66 | $13.32 |
| premium | $4.89 | $7.47 | $14.93 |
| diesel | $5.61 | $8.57 | $17.13 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$6
Estimated CO2 emission: 13.6 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $4 in charging · 0 stops · 64% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 11.6 | 0 | $4.07 | $1.86 |
| Efficient EV | 9.7 | 0 | $3.39 | $1.55 |
| EV Truck/SUV | 15.5 | 0 | $5.43 | $2.48 |
Gas CO2
14 kg
EV CO2
5 kg (64% 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
Saint George, MO
Evening in Saint George on Thursday
Local time
7:00 PM
CDT
Current temp
77°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
20 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
51m 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.
Frequently Asked Questions
The drive from O'Fallon, MO to Saint George, MO covers 38.8 miles and takes about 51m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 270, I 70, I 55. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 19.4 miles from O'Fallon, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $6.07 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This is a short but busy drive. With 16 decision points packed into just 38.8 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 51m.
The main spots that need attention: at 15.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 15.2 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 34.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
On the drive from O'Fallon, MO to Saint George, MO, road signs begin pointing toward Memphis along the way.
Yes. Nearby national parks include Gateway Arch National Park.
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