Origin
Florissant, MO
Late night in Florissant on Saturday
Local time
1:47 AM
CDT
Current temp
71°F
Unavailable
Live forecast
Trip from Florissant, MO to Frontenac, MO
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Sep 5, 2026 · Editorial standards
Drive Time
22m
Distance
17.2 mi
28 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 21m
★
6 AM
0h 23m
8 AM
0h 27m
10 AM
0h 24m
12 PM
0h 24m
3 PM
0h 25m
5 PM
0h 27m
8 PM
0h 22m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Florissant, MO
Wikimedia Commons
Frontenac, MO
life vibes
Trip Overview
Florissant, MO to Frontenac, MO is 17.2 miles and takes about 22 minutes via Inner Belt Expressway and Daniel Boone Expressway, with a fuel budget near $3 and enough daylight to finish in a day. This short drive stays within the Midwest region, specifically Missouri, making it a quick hop between two points. You'll spend most of your time on highways, so expect a straightforward trip. It's ideal for a quick errand, a connection to another longer route, or simply getting from one side of the metro area to the other without much fuss.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Inner Belt Expressway | 10.5 mi | 13m |
| Daniel Boone Expressway | 3.6 mi | 4m |
| North New Florissant Road | 1.2 mi | 2m |
| Rosemary Straub Davison Highway | 0.5 mi | <1m |
| Dunn Road | 0.2 mi | <1m |
| Avenue of the Saints | 0.2 mi | <1m |
Longest stretch:
Inner Belt Expressway
— 10.5 mi, about 13m
Traffic on I-64
Hour-of-day weekday pattern from 18 FHWA count stations on your route.
Peak
7 AM
~5,822 veh/hr typical · worst 7,201
Quietest
2 AM
~165 veh/hr
Peak-to-quiet ratio
35.3×
busier at peak than in the quiet hours
12a
6a
noon
6p
11p
Averaged across 91 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 Florissant, MO and Frontenac, MO.
1
Start on North New Florissant Road
1.2 mi
·
2 min
·
North New Florissant Road
2
Turn right onto Dunn Road
0.2 mi
·
29 sec
·
Dunn Road
Use the right lane.
3
Take the ramp
0.2 mi
·
30 sec
Toward I 270 West
4
Merge onto I 270
0.5 mi
·
36 sec
·
Rosemary Straub Davison Highway
5
Take the exit
0.5 mi
·
46 sec
Exit 26A
Toward I 170 South: Clayton
Use the straight / slight right lanes.
6
Continue on I 170
10 mi
·
13 min
·
Inner Belt Expressway
Use the slight left / straight lanes.
7
Keep slight right at fork
0.3 mi
·
28 sec
Exit 1B
Toward I 64 West, US 40 West: Wentzville
Use the slight right lane.
8
Merge onto I 64; US 40
3.6 mi
·
4 min
·
Daniel Boone Expressway
Use the straight lane.
9
Continue on I 64; US 40; US 61
0.2 mi
·
14 sec
·
Avenue of the Saints
10
Arrive at destination
I 64; US 40; US 61
Heads-up: tricky spots
5 of 65 decision points cluster between mile 1.2 and 13.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
1.2 mi into trip
|
~2m in
|
Dunn Road
Turn right onto Dunn Road
Lane positioning matters here
Use the right lane.
4
1.4 mi into trip
|
~2m in
Take the ramp toward I 270 West
Navigation decision point
Toward I 270 West
7
2.1 mi into trip
|
~4m in
Take the exit toward I 170 South: Clayton
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 26A
Toward I 170 South: Clayton
9
13.1 mi into trip
|
~17m in
Keep slight right at fork toward I 64 West, US 40 West: Wentzville
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 1B
Toward I 64 West, US 40 West: Wentzville
5
13.4 mi into trip
|
~18m in
|
I 64; US 40 / Daniel Boone Expressway
Merge onto I 64; US 40 / Daniel Boone Expressway
Merge point - match speed before joining. Lane positioning matters here
Use the straight lane.
Fuel & Cost
Regular Gas
$2.67 one way
$5.33 round trip
$3.94/gal
25.4 MPG avg
6 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.32 | $2.92 | $5.85 |
| premium | $4.93 | $3.34 | $6.67 |
| diesel | $5.60 | $3.79 | $7.58 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 6 kg one way. Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $2 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 5.2 | 0 | $1.81 | $0.83 |
| Efficient EV | 4.3 | 0 | $1.51 | $0.69 |
| EV Truck/SUV | 6.9 | 0 | $2.41 | $1.10 |
Gas CO2
6 kg
EV CO2
2 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.
Destination
Frontenac, MO
Late night in Frontenac on Saturday
Local time
1:47 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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
22m 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 mostly highway, with 82% of the route on expressways. You'll experience a longest stretch of 10.5 miles on the Inner Belt Expressway before transitioning to surface roads. Expect to encounter a high volume of exits and merging traffic typical of an urban expressway system. The final leg involves navigating on North New Florissant Road.
82% highway — fuel and pacing are the main things to plan.
10 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 10.5 mi on Inner Belt Expressway.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on Inner Belt Expressway and Daniel Boone Expressway. You will hit about 6 points where you need to pay attention to lane position or signs. The trickiest moment comes around 1.2 miles in near Dunn Road.
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 17.2 miles you will encounter 6 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 (Dunn Road): Lane positioning matters here; at 1.4 miles: Navigation decision point; at 2.1 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Elevation Profile
Mostly flat terrain
615 ft
505 ft
Total Climb
155 ft
Total Descent
161 ft
Highest Point
615 ft
~8.6 mi in
Elevation Range
110 ft
About the Cities
Starting in Florissant, MO
Full guide →Founded 1785
Arriving in Frontenac, MO
Full guide →Top landmarks
- • Des Peres Presbyterian Church — church building in Frontenac, United States of America
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 22m. Total distance: 17.2 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
22m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (82%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 10.5 miles on Inner Belt Expressway. 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 Frontenac, 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 1.2 miles (Dunn Road): Lane positioning matters here; at 1.4 miles: Navigation decision point; at 2.1 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 Frontenac, 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, USGS 3DEP for elevation, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.
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