Origin
Saint Peters, MO
Morning in Saint Peters on Tuesday
Local time
7:13 AM
CDT
Current temp
71°F
Unavailable
Live forecast
Trip from Saint Peters, MO to Sullivan, MO
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards
Drive Time
1h 29m
Distance
65.9 mi
106 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$10
one way
EV Charging
Unknown
Best Time to Leave
4 AM
1h 23m
★
6 AM
1h 30m
8 AM
1h 44m
10 AM
1h 35m
12 PM
1h 33m
3 PM
1h 35m
5 PM
1h 43m
8 PM
1h 26m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Peters, MO
Wikimedia Commons
Sullivan, MO
Chris Duan
Trip Overview
Saint Peters, MO to Sullivan, MO is 65.9 miles and takes about 1 hour 29 minutes via I 44 and MO 100, with a fuel budget near $10 and enough daylight to finish in a day. This drive stays within the Midwest region, primarily in Missouri, making it a straightforward trip. Given its relatively short distance and manageable duration, it's well-suited for a single-day excursion. You'll spend most of your time on interstate highways before transitioning to state roads as you approach your destination. It's a practical option for a quick regional hop.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 44 | 27.1 mi | 29m |
| MO 100 | 13.3 mi | 18m |
| MO K | 6.5 mi | 11m |
| MO 109 | 4.7 mi | 7m |
| Avenue of the Saints | 3.7 mi | 4m |
| I 70 | 3 mi | 3m |
| North Eatherton Road | 2.4 mi | 4m |
| Olive Street Road | 0.9 mi | 1m |
Longest stretch:
I 44
— 27.1 mi, about 29m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Peters, MO and Sullivan, MO.
1
Start on I 70
3.0 mi
·
3 min
·
I 70
Use the straight / slight right lanes.
2
Take the exit
390 ft
·
8 sec
Exit 218
Toward MO K: O'Fallon, Main Street
Use the slight right lane.
3
Turn straight onto East Terra Lane
0.9 mi
·
1 min
·
East Terra Lane
Use the straight lane.
4
Turn slight left
61 ft
·
1 sec
5
Continue on MO K
3.1 mi
·
5 min
·
MO K
Use the left lane.
6
Continue on MO K
3.4 mi
·
5 min
·
MO K
Use the straight lane.
7
Take the ramp
0.3 mi
·
21 sec
Toward I 64 East, US 40 East, US 61 South
Use the slight right lane.
8
Merge onto I 64; US 40; US 61
3.7 mi
·
4 min
·
Avenue of the Saints
9
Take the exit
0.5 mi
·
57 sec
Exit 14
Toward Chesterfield Airport Road
Use the slight right lane.
10
Continue on Chesterfield Airport Road
361 ft
·
6 sec
·
Chesterfield Airport Road
11
Turn right
211 ft
·
5 sec
Toward Olive Street Road
12
Turn right onto Olive Street Road
0.9 mi
·
1 min
·
Olive Street Road
13
Continue on North Eatherton Road
2.4 mi
·
4 min
·
North Eatherton Road
14
Enter roundabout onto MO 109
70 ft
·
1 sec
·
MO 109
15
Continue on MO 109
4.3 mi
·
6 min
·
MO 109
16
Enter roundabout onto MO 109
94 ft
·
2 sec
·
MO 109
17
Continue on MO 109
0.4 mi
·
44 sec
·
MO 109
18
Enter roundabout
76 ft
·
1 sec
Toward MO 100 West: Gray Summit
19
Continue
0.2 mi
·
32 sec
Toward MO 100 West: Gray Summit
20
Merge onto MO 100
13 mi
·
18 min
·
MO 100
21
Take the exit
0.2 mi
·
14 sec
Toward I 44 West, US 50 West: St. Clair
22
Merge onto I 44; US 50
27 mi
·
29 min
·
I 44; US 50
Use the straight lane.
23
Take the exit
0.2 mi
·
32 sec
Exit 226
Toward MO 185 South, MO AF: Sullivan, Potosi
24
Turn left
0.3 mi
·
33 sec
25
Turn right onto US Historic 66
0.8 mi
·
1 min
·
East Springfield Road
26
Turn left onto North Clark Street
0.3 mi
·
51 sec
·
North Clark Street
27
At end of road, turn right onto West Main Street
0.1 mi
·
21 sec
·
West Main Street
28
Turn left onto Hughes Ford Road
117 ft
·
4 sec
·
Hughes Ford Road
29
Turn left onto West Washington Street
337 ft
·
10 sec
·
West Washington Street
30
Turn right
55 ft
·
4 sec
31
Arrive at destination
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
33 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 14 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 32.9 miles from Saint Peters, 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 245 decision points cluster between mile 3 and 64 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
3 mi into trip
|
~3m 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
6
10.5 mi into trip
|
~16m in
Take the ramp toward I 64 East, US 40 East, US 61 South
Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 64 East, US 40 East, US 61 South
7
14.5 mi into trip
|
~21m in
Take the exit toward Chesterfield Airport Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 14
Toward Chesterfield Airport Road
5
23.1 mi into trip
|
~37m in
Enter roundabout toward MO 100 West: Gray Summit
Roundabout - know your exit number before entering
Toward MO 100 West: Gray Summit
6
64 mi into trip
|
~1h 25m in
Take the exit toward MO 185 South, MO AF: Sullivan, Potosi
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 226
Toward MO 185 South, MO AF: Sullivan, Potosi
Fuel & Cost
Regular Gas
$10.30 one way
$20.61 round trip
$3.97/gal
25.4 MPG avg
23 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $11.31 | $22.62 |
| premium | $4.89 | $12.68 | $25.36 |
| diesel | $5.61 | $14.55 | $29.10 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$10
Estimated CO2 emission: 23.1 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $7 in charging · 0 stops · 65% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 19.8 | 0 | $6.92 | $3.16 |
| Efficient EV | 16.5 | 0 | $5.77 | $2.64 |
| EV Truck/SUV | 26.4 | 0 | $9.23 | $4.22 |
Gas CO2
23 kg
EV CO2
8 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
Sullivan, MO
Morning in Sullivan on Tuesday
Local time
7:13 AM
CDT
Current temp
53°F
Unavailable
Live forecast
59°F
Wildwood, MO
33 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
18 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
1h 29m 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?
This route is mostly highway, with 73% of the drive on interstates and major roads. You'll experience a significant stretch of 27.1 miles on I 44 without needing to exit, offering a consistent cruising experience. After leaving I 44, you'll transition to MO 100 and MO K, which are more typical state highways. Expect a change in scenery and potentially more local traffic as you move from the interstate to these surface roads.
73% highway — fuel and pacing are the main things to plan.
31 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 27.1 mi on I 44.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 44 and MO 100. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 3 miles in.
Driving Effort
8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 65.9 miles you will encounter 24 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 3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 10.5 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 14.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
About the Cities
Arriving in Sullivan, MO
Full guide →St. Louis Area is the region around St. Louis, Missouri. It borders St. Louis Metro East (Illinois) along the Mississippi River. Within Missouri, it borders Southeast Missouri, Central Missouri, and Northeast Missouri.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 29m. Total distance: 65.9 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 29m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (73%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 27.1 miles on I 44. 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 Sullivan, 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 3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 10.5 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 14.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Sullivan, 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, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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