Fair Grove, MO to Saint Peters, MO is 200.7 miles and takes about 3h 59m via I 44, with a fuel budget near $30 and enough daylight to finish in a day. This trip stays within the Midwest, traveling entirely within Missouri. It's a straightforward drive that's easy to manage, making it a good option if you want to get from point A to point B efficiently. With a recommended single day of travel and a modest fuel cost, it's a practical choice for a quick hop across the state.
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
100.3 miles from Fair Grove, MO
A natural place for your longest stop of the day
, about 1h 53m into the drive
.
Main Roads
Road
Distance
Duration
I 44
152 mi
2h 43m
Manchester Road
13.4 mi
18m
MO E
7.2 mi
9m
County Road 523
5.9 mi
8m
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
Longest stretch:
I 44
— 152 mi, about 2h 43m
Traffic on I-44
Hour-of-day weekday pattern from 4 FHWA count stations on your route.
Peak
4 PM
~1,183 veh/hr typical
· worst 1,456
Quietest
2 AM
~158 veh/hr
Peak-to-quiet ratio
7.5×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Fair Grove, MO and Saint Peters, MO.
1
Start on MO 125
0.7 mi·1 min·West Old Mill Road
2
Continue on MO 125
0.2 mi·18 sec·South Grove Road
3
Turn left onto MO E
7.2 mi·9 min·MO E
4
Turn straight onto MO 38
5.9 mi·8 min·County Road 523
5
Turn right onto MO 38
0.1 mi·29 sec·Spur Drive
6
Take the ramp
0.2 mi·23 sec
Toward I 44 East: Rolla
7
Merge onto I 44
152 mi·2 hr 43 min·I 44
8
Take the exit
0.2 mi·27 sec
Exit 253Toward I 44 Business, MO 100 East: Gray SummitUse the slight right lane.
9
Turn left onto MO 100
13 mi·18 min·Manchester Road
Use the straight lane.
10
Take the exit
0.2 mi·30 sec
Toward MO 109
11
Enter roundabout onto MO 109
224 ft·4 sec·MO 109
12
Continue on MO 109
515 ft·10 sec·MO 109
13
Enter roundabout onto MO 109
98 ft·1 sec·MO 109
14
Continue on MO 109
0.4 mi·45 sec·MO 109
15
Enter roundabout onto MO 109
94 ft·2 sec·MO 109
16
Continue on MO 109
4.3 mi·6 min·MO 109
17
Enter roundabout onto South Eatherton Road
94 ft·1 sec·South Eatherton Road
18
Continue on South Eatherton Road
2.4 mi·4 min·South Eatherton Road
19
Continue on Olive Street Road
0.9 mi·1 min·Olive Street Road
20
Take the ramp onto Chesterfield Airport Road
0.7 mi·1 min·Chesterfield Airport Road
21
Merge onto I 64; US 40; US 61
2.7 mi·3 min·Avenue of the Saints
Use the straight lane.
22
Take the exit
0.2 mi·15 sec
Exit 10Toward MO 94: Defiance, Saint CharlesUse the slight right lane.
23
Keep slight right at fork
313 ft·4 sec
Toward MO 94 East: Saint CharlesUse the right lane.
24
Merge onto MO 94
3.4 mi·4 min·MO 94
Use the right lane.
25
Keep slight right at fork
0.2 mi·22 sec
Toward Mid Rivers Mall Drive, Pitman Hill RoadUse the straight / slight right lanes.
26
Turn left onto Mid Rivers Mall Drive
4.7 mi·9 min·Mid Rivers Mall Drive
Use the left / straight lanes.
27
Take the ramp
0.3 mi·20 sec
Toward I 70 West: WentzvilleUse the slight left lane.
28
Merge onto I 70
479 ft·6 sec·I 70
29
Arrive at destination
I 70
Trip Plan
Given the relatively short duration of just under 4 hours, you have flexibility with your departure time. Leaving Fair Grove in the morning should allow ample time to reach Saint Peters before evening. Since there's only one recommended stop, consider making it a brief break to maximize your driving time or stop for a meal. Keep an eye on your fuel gauge, especially during the 152-mile stretch on I 44, as services can sometimes be spread out on longer highway segments. The $30 fuel estimate should cover the 200.7 miles comfortably.
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 100.3 miles from Fair Grove, MO, or about 1h 53m into the drive.
The longest continuous stretch on this route runs about 152 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 52m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 100.3 miles or 1h 53m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 2m
Traffic, exits, and arrival timing usually matter more near Saint Peters, MO than in the middle of the route.
Before You Leave
+
Open the route before leaving Fair Grove, 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 Fair Grove, MO
This is one driving day of about 200.7 miles and 3h 59m.
Your first comfortable stop window is around 44 miles from Fair Grove, 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 44 for about 152 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 20
5 decision points cluster between mile 14.1 and 195.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
14.1 mi into trip|~20m in
Take the ramp toward I 44 East: Rolla
Complex interchange - multiple decisions in a short stretch
Toward I 44 East: Rolla
8
166.3 mi into trip|~3h 4m 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
8
191.7 mi into trip|~3h 43m 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
191.9 mi into trip|~3h 43m 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
195.4 mi into trip|~3h 48m 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
$29.64 one way
$59.28 round trip
$3.75/gal25.4 MPG avg70 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$32.72
$65.44
premium
$4.72
$37.26
$74.53
diesel
$4.80
$37.90
$75.79
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: 70.2 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $21 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
60.2
0
$21.07
$9.63
Efficient EV
50.2
0
$17.56
$8.03
EV Truck/SUV
80.3
1
$28.10
$12.84
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 Jul 19, 2026
Origin
Fair Grove, MO
Evening
in Fair Grove on Sunday
Local time
6:08 PM
CDT
Current temp
72°F
Isolated Showers And Thunderstorms
S 3 mph18% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 8:17PM CDT until July 21 at 7:00PM CDT by NWS Paducah KY
Heat Advisory
Heat Advisory issued July 18 at 7:55PM CDT until July 19 at 9:00PM CDT by NWS Memphis TN
Destination
Saint Peters, MO
Evening
in Saint Peters on Sunday
Local time
6:08 PM
CDT
Current temp
75°F
Slight Chance Showers And Thunderstorms
W 3 mph18% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 8:17PM CDT until July 21 at 7:00PM CDT by NWS Paducah KY
Heat Advisory
Heat Advisory issued July 18 at 7:55PM CDT until July 19 at 9:00PM CDT by NWS Memphis TN
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
3 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 59m 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.
Wilson's Creek National Battlefield
National Battlefield
Wilson's Creek was the first major Civil War battle fought west of the Mississippi River, and where the first Union general was killed in action. The costly Southern victory on August 10, 1861, focuse...
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...
25 mi from route
~62 min detour
$19
near mile 179.9
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route is mostly highway, with 80% of the drive on freeways. You'll spend the longest stretch of 152 miles on I 44. Expect a significant number of exits and services along I 44 before transitioning to Manchester Road and MO E for the final segment. This means you'll encounter more local traffic and potentially slower speeds as you approach your destination.
80% highway — fuel and pacing are the main things to plan.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 152 mi on I 44.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on I 44 and Manchester Road. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 14.1 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 20 significant decision points across 200.7 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 14.1 miles: Complex interchange - multiple decisions in a short stretch; at 166.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 191.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Doable as a same-day drive at 3h 59m. Total distance: 200.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 59m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (80%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 152 miles on I 44. 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 Saint Peters, 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 14.1 miles: Complex interchange - multiple decisions in a short stretch; at 166.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 191.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Wilson's Creek National Battlefield and Gateway Arch National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.0 hours each way, an in-and-out day trip would put you behind the wheel for 8.0 hours — manageable with a long break at Saint Peters, MO, but most travelers stay overnight.
