Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
31m
Distance
24.5 mi
39 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$4
one way
EV Charging
Fair
4 stations
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Saint Peters, MO
Wikimedia Commons
Frontenac, MO
life vibes
Saint Peters, MO to Frontenac, MO is 24.5 miles and takes about 31m via I 70, with a fuel budget near $4 and enough daylight to finish in a day. This short trip stays within the Midwest region, specifically within Missouri. It's primarily a highway-focused drive, making it a straightforward option for getting from point A to point B. Given its brief duration, this route is perfect for a same-day excursion or as a quick leg of a longer journey, offering minimal travel time and a low fuel cost.
| Road | Distance | Duration |
|---|---|---|
| I 70 | 13 mi | 16m |
| I 270 | 6.9 mi | 8m |
| Avenue of the Saints | 1.4 mi | 1m |
| US 61 | 0.7 mi | 1m |
| MO 79 | 0.1 mi | <1m |
Step-by-step road directions between Saint Peters, MO and Frontenac, MO.
Start on I 70
Take the exit
Keep slight left at fork
Turn left onto MO 79
Take the ramp
Merge onto I 70
Take the exit
Keep slight right at fork
Continue on this road
Merge onto I 270
Take the exit
Keep slight left at fork
Continue on this road
Keep slight left at fork
Continue on this road
Merge onto I 64; US 40; US 61
Take the exit onto US 61
Keep slight left at fork
Turn left onto US 61
Arrive at destination
5 decision points cluster between mile 1.2 and 21.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
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
Take the exit toward I 270: Chicago, Memphis
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Take the exit toward I 64, US 40, US 61: Saint Louis, Wentzville
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Keep slight left at fork toward I 64 East, US 40 East, US 61 South: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Keep slight left at fork toward I 64, US 40, US 61: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Regular Gas
$3.83 one way
$7.66 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $4.21 | $8.41 |
| premium | $4.89 | $4.71 | $9.43 |
| diesel | $5.61 | $5.41 | $10.82 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$4
Estimated CO2 emission: 8.6 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $3 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 7.4 | 0 | $2.57 | $1.18 |
| Efficient EV | 6.1 | 0 | $2.14 | $0.98 |
| EV Truck/SUV | 9.8 | 0 | $3.43 | $1.57 |
Gas CO2
9 kg
EV CO2
3 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.
Current conditions at both ends of the drive.
Origin
Late night in Saint Peters on Sunday
Local time
1:02 AM
CDT
Current temp
58°F
Mostly Sunny
Destination
Late night in Frontenac on Sunday
Local time
1:02 AM
CDT
Current temp
83°F
Unavailable
Time zone
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
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.
This drive is predominantly highway-focused, with 85% of the journey utilizing major interstates like I 70 and I 270, and a portion of the Avenue of the Saints. You'll experience a longest uninterrupted stretch of about 13 miles on I 70, offering a consistent, high-speed experience for a good portion of the trip. The road character remains largely consistent as a busy interstate, so expect typical highway traffic and conditions throughout. It's a functional route designed for efficient travel rather than scenic exploration.
This is a straightforward highway drive that stays mostly on I 70 and I 270. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 1.2 miles in.
Focused - lots of decisions in a short distance, but it is over quickly
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 17 decision points packed into just 24.5 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 31m.
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 13.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 21.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Saint Peters, MO and Frontenac, MO, road signs point toward Memphis and Wentzville.
Memphis
Wentzville
Weekend Trip
Doable as a same-day drive at 31m. Total distance: 24.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
31m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (85%). Some complex stretches to watch for.
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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