Origin
O'Fallon, MO
Evening in O'Fallon on Friday
Local time
7:51 PM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from O'Fallon, MO to Saint Martins, MO
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
2h 7m
Distance
109.3 mi
176 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$17
one way
EV Charging
Unknown
Best Time to Leave
4 AM
1h 59m
★
6 AM
2h 8m
8 AM
2h 26m
10 AM
2h 14m
12 PM
2h 12m
3 PM
2h 15m
5 PM
2h 25m
8 PM
2h 2m
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 Martins, MO
Abdulmomen Bsruki
Trip Overview
The drive from O'Fallon, MO to Saint Martins, MO covers 109.3 miles and takes about 2h 7m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 70, US 54, US 50 for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 69.4 miles on I 70. At current regular gas prices, budget about $17.09 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.
Midpoint
54.7 miles from O'Fallon, MO
A natural place for your longest stop of the day , about 1h 4m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 7m. Total distance: 109.3 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
2h 7m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (98%). Some complex stretches to watch for.
Drive Character
This is a 2h 7m highway drive covering 109.3 miles, with most of the trip on I 70 and US 54. The longest continuous stretch is about 69.4 miles on I 70.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 17 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 70 is the longest continuous segment at about 69.4 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 70 and US 54. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.6 miles in.
Driving Effort
8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 14 significant decision points across 109.3 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 0.6 miles: Lane positioning matters here; at 0.6 miles (South Main Street): Sharp turn - reduce speed on approach; at 0.7 miles (West Terra Lane): Lane positioning matters here.
Critical Maneuvers
5 of 14 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
6
0.6 mi into trip
|
~1m in
Turn left toward I 70 East
Lane positioning matters here
Use the left lane.
Toward I 70 East
6
0.6 mi into trip
|
~1m in
|
South Main Street
Turn sharp left onto South Main Street
Sharp turn - reduce speed on approach
6
0.7 mi into trip
|
~2m in
|
West Terra Lane
Turn left onto West Terra Lane
Lane positioning matters here
Use the left lane.
7
100.1 mi into trip
|
~1h 55m in
|
US 63
Keep slight left at fork onto US 63 toward US 63 South, US 50
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 63 South, US 50
8
100.3 mi into trip
|
~1h 56m in
Keep slight right at fork toward US 50 West: Sedalia
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward US 50 West: Sedalia
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between O'Fallon, MO and Saint Martins, MO, road signs point toward Mexico and Fulton.
Mexico
70.2 mi in
|
~1h 22m
Fulton
70.2 mi in
|
~1h 22m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 69.4 mi | 1h 20m |
| US 54 | 29.6 mi | 32m |
| US 50 | 7.6 mi | 8m |
| Business 50 West | 0.7 mi | 1m |
| South Main Street | 0.6 mi | 1m |
| US 63 | 0.2 mi | <1m |
| Lomo Drive | 0.2 mi | <1m |
| West Terra Lane | 0.1 mi | <1m |
Longest stretch:
I 70
— 69.4 mi, about 1h 20m
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, MO and Saint Martins, 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
34 ft
·
6 sec
Toward I 70 East
Use the left lane.
4
Turn sharp left onto South Main Street
284 ft
·
11 sec
·
South Main Street
5
Turn left onto West Terra Lane
0.1 mi
·
12 sec
·
West Terra Lane
Use the left lane.
6
Take the ramp
479 ft
·
6 sec
Toward I 70 West
7
Merge onto I 70
69 mi
·
1 hr 20 min
·
I 70
Use the straight / slight right lanes.
8
Take the exit
0.2 mi
·
27 sec
Exit 148
Toward US 54: Auxvasse, Mexico, Fulton
9
Turn left onto US 54
30 mi
·
32 min
·
US 54
10
Take the exit onto US 63
217 ft
·
4 sec
·
US 63
Toward US 63 South, US 50
11
Keep slight left at fork onto US 63
0.1 mi
·
16 sec
·
US 63
Toward US 63 South, US 50
12
Keep slight right at fork
0.2 mi
·
29 sec
Toward US 50 West: Sedalia
Use the slight right lane.
13
Merge onto US 50
7.6 mi
·
8 min
·
US 50
14
Take the exit
0.4 mi
·
46 sec
Toward MO D, MO T: Saint Martins, Lohman
15
Turn right onto MO T
0.2 mi
·
20 sec
·
Lomo Drive
16
Turn left onto Business 50 West
0.7 mi
·
1 min
·
Business 50 West
17
Arrive at destination
Business 50 West
Trip Plan
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 54.7 miles from O'Fallon, MO, or about 1h 4m into the drive.
The longest continuous stretch on this route runs about 69.4 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 24 miles or 29m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 54.7 miles or 1h 4m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 44m
Traffic, exits, and arrival timing usually matter more near Saint Martins, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving O'Fallon, 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 O'Fallon, MO
This is one driving day of about 109.3 miles and 2h 7m.
Your first comfortable stop window is around 24 miles from O'Fallon, MO.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on I 70 for about 69.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 54.7 mi from O'Fallon, MO · 1h 4m into the drive
Mid-route town
Meal stop
55 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 24 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 54.7 miles from O'Fallon, MO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 70 if your tank is already low. That segment runs about 69.4 miles.
Arriving in Saint Martins, MO
The final approach into Saint Martins, 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 Saint Martins, MO.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$17.09 one way
$34.18 round trip
$3.97/gal
25.4 MPG avg
38 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $18.76 | $37.52 |
| premium | $4.89 | $21.03 | $42.07 |
| diesel | $5.61 | $24.13 | $48.26 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$17
Meals
$25–$50
Total
$42–$67
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 38.2 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $11 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 32.8 | 0 | $11.48 | $5.25 |
| Efficient EV | 27.3 | 0 | $9.56 | $4.37 |
| EV Truck/SUV | 43.7 | 0 | $15.30 | $7.00 |
Gas CO2
38 kg
EV CO2
13 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
Saint Martins, MO
Evening in Saint Martins on Friday
Local time
7:51 PM
CDT
Current temp
57°F
Unavailable
Live forecast
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
2h 7m 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 Martins, MO covers 109.3 miles and takes about 2h 7m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 70, US 54, US 50. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 54.7 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 $17.09 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 demanding drive. With 14 significant decision points across 109.3 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.
The main spots that need attention: at 0.6 miles: Lane positioning matters here; at 0.6 miles (South Main Street): Sharp turn - reduce speed on approach; at 0.7 miles (West Terra Lane): Lane positioning matters here.
Between O'Fallon, MO and Saint Martins, MO, road signs point toward Mexico and Fulton.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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