Origin
Saint Ann, MO
Morning in Saint Ann on Tuesday
Local time
8:00 AM
CDT
Current temp
69°F
Unavailable
Live forecast
Trip from Saint Ann, MO to Saint Peters, 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
20m
Distance
14.8 mi
24 km
Drive Score
5/10
Practical drive
Same Day?
Yes, doable
Fuel Cost
$2
one way
EV Charging
Fair
3 stations
Best Time to Leave
4 AM
0h 18m
★
6 AM
0h 20m
8 AM
0h 24m
10 AM
0h 21m
12 PM
0h 21m
3 PM
0h 21m
5 PM
0h 23m
8 PM
0h 19m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Ann, MO
Wikimedia Commons
Saint Peters, MO
Wikimedia Commons
Trip Overview
Saint Ann, MO to Saint Peters, MO is 14.8 miles and takes about 20m via I 70, with a fuel budget near $2 and enough daylight to finish in a day. This short hop stays within the Midwest region, specifically within Missouri, making it a convenient local journey. Expect a straightforward drive focused on efficient travel between these two points. It's a quick trip, ideal for when you need to get from one place to another without a lot of fuss. Consider it a simple connector rather than a destination in itself.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 70 | 12.4 mi | 15m |
| Saint Charles Rock Road | 2 mi | 3m |
| San Jose Lane | <0.1 mi | <1m |
Longest stretch:
I 70
— 12.4 mi, about 15m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Ann, MO and Saint Peters, MO.
1
Start on San Jose Lane
421 ft
·
24 sec
·
San Jose Lane
2
Turn left onto MO 180
2.0 mi
·
3 min
·
Saint Charles Rock Road
3
Take the ramp
0.3 mi
·
19 sec
Toward I 70 West
Use the slight right lane.
4
Merge onto I 70
12 mi
·
15 min
·
I 70
Use the straight / slight right lanes.
5
Arrive at destination
I 70
Heads-up: tricky spots
3 of 33 decision points cluster between mile 0.1 and 2.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.1 mi into trip
|
~0m in
|
MO 180 / Saint Charles Rock Road
Turn left onto MO 180 / Saint Charles Rock Road
Navigation decision point
6
2.1 mi into trip
|
~4m in
Take the ramp toward I 70 West
Lane positioning matters here
Use the slight right lane.
Toward I 70 West
5
2.4 mi into trip
|
~4m in
|
I 70
Merge onto I 70
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
Fuel & Cost
Regular Gas
$2.31 one way
$4.63 round trip
$3.97/gal
25.4 MPG avg
5 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $2.54 | $5.08 |
| premium | $4.89 | $2.85 | $5.70 |
| diesel | $5.61 | $3.27 | $6.54 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$2
Estimated CO2 emission: 5.2 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 60% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 4.4 | 0 | $1.55 | $0.71 |
| Efficient EV | 3.7 | 0 | $1.30 | $0.59 |
| EV Truck/SUV | 5.9 | 0 | $2.07 | $0.95 |
Gas CO2
5 kg
EV CO2
2 kg (60% 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
Morning in Saint Peters on Tuesday
Local time
8:00 AM
CDT
Current temp
71°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
2 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
20m 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 drive is predominantly highway-focused, with 84% of the journey on interstates. You'll spend most of your time on I 70, experiencing a stretch of 12.4 miles without interruption on this main artery. While Saint Charles Rock Road and San Jose Lane are part of the route, the character is overwhelmingly that of a freeway commute. The experience behind the wheel will be largely about maintaining speed and navigating standard highway conditions, with minimal deviation from the fast-paced interstate environment.
84% highway — fuel and pacing are the main things to plan.
5 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 12.4 mi on I 70.
How Hard Is This Drive?
1/10
This is a straightforward highway drive that stays mostly on I 70 and Saint Charles Rock Road. Navigation is very simple - set it and forget it for most of the drive. The trickiest moment comes around 0.1 miles in near MO 180 / Saint Charles Rock Road.
Driving Effort
1/10
Very easy - short and simple to drive
Balances navigation complexity with total wheel time.
The drive from Saint Ann, MO to Saint Peters, MO is easy. At 20m with 84% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (MO 180 / Saint Charles Rock Road): Navigation decision point; at 2.1 miles: Lane positioning matters here; at 2.4 miles (I 70): Merge point - match speed before joining. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 20m. Total distance: 14.8 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
20m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (84%). Straightforward navigation.
Frequently Asked Questions
The longest stretch is about 12.4 miles on I 70. The full list of main roads is in the Roads section above.
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 0.1 miles (MO 180 / Saint Charles Rock Road): Navigation decision point; at 2.1 miles: Lane positioning matters here; at 2.4 miles (I 70): Merge point - match speed before joining. Lane positioning matters here.
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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