Origin
Saint Clair, MO
Night in Saint Clair on Saturday
Local time
11:20 PM
CDT
Current temp
53°F
Unavailable
Live forecast
Trip from Saint Clair, MO to Saint Peters, 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 11m
Distance
48.4 mi
78 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$8
one way
EV Charging
Good
8 stations
Best Time to Leave
4 AM
1h 6m
★
6 AM
1h 12m
8 AM
1h 23m
10 AM
1h 16m
12 PM
1h 14m
3 PM
1h 16m
5 PM
1h 22m
8 PM
1h 8m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Clair, MO
Jermaine Lewis
Saint Peters, MO
Wikimedia Commons
Trip Overview
This 48.4-mile drive from Saint Clair to Saint Peters, Missouri, is easily manageable in just over an hour, making it an ideal one-day trip. You'll primarily navigate using Manchester Road and I-44, with MO 109 also playing a role. With a modest fuel cost of around $8, this route offers a straightforward journey through the Midwest region of Missouri. The mixed drive profile suggests a blend of experiences, so you won't be stuck on a single type of road for too long. It's a short enough distance that you can be flexible with your departure time and enjoy a leisurely pace.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Manchester Road | 13.4 mi | 18m |
| I 44 | 12.5 mi | 13m |
| MO 109 | 4.9 mi | 7m |
| Mid Rivers Mall Drive | 4.7 mi | 9m |
| MO 94 | 3.4 mi | 4m |
| Avenue of the Saints | 2.7 mi | 3m |
| South Eatherton Road | 2.4 mi | 4m |
| South Main Street | 1.2 mi | 2m |
Longest stretch:
Manchester Road
— 13.4 mi, about 18m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Clair, MO and Saint Peters, MO.
1
Start on South Main Street
1.2 mi
·
2 min
·
South Main Street
2
Take the ramp
0.3 mi
·
39 sec
Toward I 44 East: Saint Louis
3
Merge onto I 44
13 mi
·
13 min
·
I 44
4
Take the exit
0.2 mi
·
27 sec
Exit 253
Toward I 44 Business, MO 100 East: Gray Summit
Use the slight right lane.
5
Turn left onto MO 100
13 mi
·
18 min
·
Manchester Road
Use the straight lane.
6
Take the exit
0.2 mi
·
30 sec
Toward MO 109
7
Enter roundabout onto MO 109
224 ft
·
4 sec
·
MO 109
8
Continue on MO 109
515 ft
·
10 sec
·
MO 109
9
Enter roundabout onto MO 109
98 ft
·
1 sec
·
MO 109
10
Continue on MO 109
0.4 mi
·
45 sec
·
MO 109
11
Enter roundabout onto MO 109
94 ft
·
2 sec
·
MO 109
12
Continue on MO 109
4.3 mi
·
6 min
·
MO 109
13
Enter roundabout onto South Eatherton Road
94 ft
·
1 sec
·
South Eatherton Road
14
Continue on South Eatherton Road
2.4 mi
·
4 min
·
South Eatherton Road
15
Continue on Olive Street Road
0.9 mi
·
1 min
·
Olive Street Road
16
Take the ramp onto Chesterfield Airport Road
0.7 mi
·
1 min
·
Chesterfield Airport Road
17
Merge onto I 64; US 40; US 61
2.7 mi
·
3 min
·
Avenue of the Saints
Use the straight lane.
18
Take the exit
0.2 mi
·
15 sec
Exit 10
Toward MO 94: Defiance, Saint Charles
Use the slight right lane.
19
Keep slight right at fork
313 ft
·
4 sec
Toward MO 94 East: Saint Charles
Use the right lane.
20
Merge onto MO 94
3.4 mi
·
4 min
·
MO 94
Use the right lane.
21
Keep slight right at fork
0.2 mi
·
22 sec
Toward Mid Rivers Mall Drive, Pitman Hill Road
Use the straight / slight right lanes.
22
Turn left onto Mid Rivers Mall Drive
4.7 mi
·
9 min
·
Mid Rivers Mall Drive
Use the left / straight lanes.
23
Take the ramp
0.3 mi
·
20 sec
Toward I 70 West: Wentzville
Use the slight left lane.
24
Merge onto I 70
479 ft
·
6 sec
·
I 70
25
Arrive at destination
I 70
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
24 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 11 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 24.2 miles from Saint Clair, 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 185 decision points cluster between mile 14 and 43.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
14 mi into trip
|
~16m in
Take the exit toward I 44 Business, MO 100 East: Gray Summit
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 253
Toward I 44 Business, MO 100 East: Gray Summit
5
14.2 mi into trip
|
~17m in
|
MO 100 / Manchester Road
Turn left onto MO 100 / Manchester Road
Lane positioning matters here
Use the straight lane.
8
39.4 mi into trip
|
~55m in
Take the exit toward MO 94: Defiance, Saint Charles
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 10
Toward MO 94: Defiance, Saint Charles
8
39.6 mi into trip
|
~56m in
Keep slight right at fork toward MO 94 East: Saint Charles
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward MO 94 East: Saint Charles
8
43.1 mi into trip
|
~1h 1m in
Keep slight right at fork toward Mid Rivers Mall Drive, Pitman Hill Road
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward Mid Rivers Mall Drive, Pitman Hill Road
Fuel & Cost
Regular Gas
$7.57 one way
$15.13 round trip
$3.97/gal
25.4 MPG avg
17 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $8.31 | $16.62 |
| premium | $4.89 | $9.31 | $18.63 |
| diesel | $5.61 | $10.69 | $21.37 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$8
Estimated CO2 emission: 16.9 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $5 in charging · 0 stops · 65% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 14.5 | 0 | $5.08 | $2.32 |
| Efficient EV | 12.1 | 0 | $4.23 | $1.94 |
| EV Truck/SUV | 19.4 | 0 | $6.78 | $3.10 |
Gas CO2
17 kg
EV CO2
6 kg (65% 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 Peters, MO
Night in Saint Peters on Saturday
Local time
11:20 PM
CDT
Current temp
57°F
Unavailable
Live forecast
75°F
Wildwood, MO
24 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
4 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 11m 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?
Expect a mixed drive on this route, with 43% of your journey on highways. The longest continuous stretch you'll encounter is 13.4 miles on Manchester Road, offering a good opportunity to settle in. You'll experience a blend of faster highway travel and potentially more local road driving, so be prepared for changing speed limits and road conditions. This variety means the drive itself offers a dynamic feel rather than a monotonous experience, keeping you engaged as you transition between different road types.
43% highway, the rest on surface roads — varied driving throughout.
25 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 13.4 mi on Manchester Road.
How Hard Is This Drive?
10/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 14 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 48.4 miles you will encounter 18 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 14 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 14.2 miles (MO 100 / Manchester Road): Lane positioning matters here; at 39.4 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.
On the drive from Saint Clair, MO to Saint Peters, MO, road signs begin pointing toward Saint Charles along the way.
Saint Charles
39.4 mi in
|
~55m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 11m. Total distance: 48.4 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 11m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (43%). Some complex stretches to watch for.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 13.4 miles on Manchester Road. 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 Saint Peters, 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 14 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 14.2 miles (MO 100 / Manchester Road): Lane positioning matters here; at 39.4 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. 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 Saint Peters, 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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