Origin
Saint Peters, MO
Late night in Saint Peters on Friday
Local time
5:28 AM
CDT
Current temp
57°F
Unavailable
Live forecast
Trip from Saint Peters, MO to Saint John, MO
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
28m
Distance
20.6 mi
33 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 26m
★
6 AM
0h 28m
8 AM
0h 33m
10 AM
0h 30m
12 PM
0h 30m
3 PM
0h 30m
5 PM
0h 33m
8 PM
0h 27m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Peters, MO
Wikimedia Commons
Saint John, MO
Erik Mclean
Trip Overview
The drive from Saint Peters, MO to Saint John, MO covers 20.6 miles and takes about 28m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 70, Brown Road, Natural Bridge Road for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 18.4 miles on I 70. At current regular gas prices, budget about $3.22 one way before food or hotel costs.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 28m. Total distance: 20.6 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
28m 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 28m highway drive covering 20.6 miles, with most of the trip on I 70 and Brown Road. The longest continuous stretch is about 18.4 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 13 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 18.4 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 70 and Brown Road. You will hit about 11 points where you need to pay attention to lane position or signs. The trickiest moment comes around 1.2 miles in.
Driving Effort
6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 20.6 miles you will encounter 11 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 1.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 1.3 miles: Highway fork - watch signs carefully; at 1.5 miles: Lane positioning matters here.
Critical Maneuvers
5 of 11 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
8
1.2 mi into trip
|
~1m in
Take the exit toward MO 79: Elsberry, Louisiana
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 220
Toward MO 79: Elsberry, Louisiana
6
1.3 mi into trip
|
~1m in
Keep slight left at fork toward MO 79
Highway fork - watch signs carefully
Toward MO 79
6
1.5 mi into trip
|
~2m in
Take the ramp toward I 70 East
Lane positioning matters here
Use the right lane.
Toward I 70 East
5
1.7 mi into trip
|
~2m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
7
19 mi into trip
|
~24m in
Take the exit toward MO 115 East: Natural Bridge Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 237
Toward MO 115 East: Natural Bridge Road
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 Peters, MO to Saint John, MO, road signs begin pointing toward Louisiana along the way.
Louisiana
1.2 mi in
|
~1m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 18.4 mi | 23m |
| Brown Road | 0.9 mi | 2m |
| Natural Bridge Road | 0.3 mi | <1m |
| MO 79 | 0.1 mi | <1m |
| Saint Louis Avenue | 0.1 mi | <1m |
| Mavis Place | <0.1 mi | <1m |
| Marshall Road | <0.1 mi | <1m |
Longest stretch:
I 70
— 18.4 mi, about 23m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Peters, MO and Saint John, MO.
1
Start on I 70
1.2 mi
·
1 min
·
I 70
2
Take the exit
0.1 mi
·
15 sec
Exit 220
Toward MO 79: Elsberry, Louisiana
Use the straight / slight right lanes.
3
Keep slight left at fork
384 ft
·
14 sec
Toward MO 79
4
Turn left onto MO 79
0.1 mi
·
11 sec
·
MO 79
5
Take the ramp
0.2 mi
·
18 sec
Toward I 70 East
Use the right lane.
6
Merge onto I 70
17 mi
·
21 min
·
I 70
Use the straight / slight right lanes.
7
Take the exit
0.2 mi
·
24 sec
Exit 237
Toward MO 115 East: Natural Bridge Road
Use the straight / slight right lanes.
8
Continue on MO 115
0.3 mi
·
35 sec
·
Natural Bridge Road
Use the straight / right lanes.
9
Turn right onto Brown Road
0.9 mi
·
2 min
·
Brown Road
10
Turn left onto Saint Louis Avenue
0.1 mi
·
27 sec
·
Saint Louis Avenue
11
Turn right onto Marshall Road
218 ft
·
14 sec
·
Marshall Road
12
Turn left onto Mavis Place
324 ft
·
14 sec
·
Mavis Place
13
Arrive at destination
Mavis Place
Fuel & Cost
Regular Gas
$3.22 one way
$6.44 round trip
$3.97/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $3.54 | $7.07 |
| premium | $4.89 | $3.96 | $7.93 |
| diesel | $5.61 | $4.55 | $9.10 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 7.2 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 6.2 | 0 | $2.16 | $0.99 |
| Efficient EV | 5.2 | 0 | $1.80 | $0.82 |
| EV Truck/SUV | 8.2 | 0 | $2.88 | $1.32 |
Gas CO2
7 kg
EV CO2
2 kg (71% 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 John, MO
Late night in Saint John on Friday
Local time
5:28 AM
CDT
Current temp
78°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
21 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
28m 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 Saint Peters, MO to Saint John, MO covers 20.6 miles and takes about 28m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 70, Brown Road, Natural Bridge Road. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 10.3 miles from Saint Peters, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $3.22 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 drive requires moderate attention. Across 20.6 miles you will encounter 11 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 1.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 1.3 miles: Highway fork - watch signs carefully; at 1.5 miles: Lane positioning matters here.
On the drive from Saint Peters, MO to Saint John, MO, road signs begin pointing toward Louisiana along the way.
How this page is built
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from OSRM over OpenStreetMap. Fuel cost uses EIA weekly regional averages. Pages are published only after passing our data-quality checks; our methodology page documents refresh cadence, editorial standards, and known limitations.
Was this helpful?
Thanks for your feedback!
Your tip has been submitted. Thanks!
/500
Recent Tips
·
Explore More
Continue From Saint John, MO
More trips to Saint John, MO
Explore more options from Saint Peters, MO or browse trips ending in Saint John, MO.
Looking for more statewide routes? Browse MO road trips.