Origin
Florissant, MO
Evening in Florissant on Wednesday
Local time
5:57 PM
CDT
Current temp
58°F
Unavailable
Live forecast
Trip from Florissant, MO to Affton, MO
Last recalculated Apr 15, 2026
Drive Time
31m
Distance
19.8 mi
32 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
Best Time to Leave
4 AM
0h 29m
★
6 AM
0h 32m
8 AM
0h 37m
10 AM
0h 34m
12 PM
0h 33m
3 PM
0h 34m
5 PM
0h 37m
8 PM
0h 30m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Florissant, MO
Wikimedia Commons
Affton, MO
Wikimedia Commons
Trip Overview
The drive from Florissant, MO to Affton, MO covers 19.8 miles and takes about 31m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Dunn Road, I 270 West, Rosemary Straub Davison Highway for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $3.10 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
0 planned breaks
This drive is short enough that no stops are needed.
Midpoint
9.9 miles from Florissant, MO
A natural place for your longest stop of the day , about 15m into the drive .
Drive Character
Expect a 31m drive with frequent turns across 19.8 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 20 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Dunn Road is one of the defining roads on this drive.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. Navigation is very simple - set it and forget it for most of the drive.
Route Complexity
1/10
Very easy - short and simple to drive
The drive from Florissant, MO to Affton, MO is easy. At 31m with 0% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
This route does not have any notably tricky sections. Most of the drive from Florissant, MO to Affton, MO is straightforward, with well-signed roads and simple exits.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Dunn Road | — | — |
| I 270 West | — | — |
| Rosemary Straub Davison Highway | — | — |
| I 170 South | — | — |
| Inner Belt Expressway | — | — |
| Brentwood Boulevard North | — | — |
| Eager Road | — | — |
| South Hanley Road | — | — |
Some road-level metrics are being recalculated.
Longest stretch:
Dunn Road
— detailed segment metrics are refreshing.
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant, MO and Affton, 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
3
Take the ramp straight toward I 270 West
0.2 mi
·
31 sec
·
I 270 West
4
Merge slight left onto Rosemary Straub Davison Highway
0.5 mi
·
37 sec
·
Rosemary Straub Davison Highway
5
Take the exit slight right toward I 170 South: Clayton
0.5 mi
·
47 sec
·
I 170 South: Clayton
6
Continue on Inner Belt Expressway
10 mi
·
12 min
·
Inner Belt Expressway
7
Take the exit slight right toward Brentwood Boulevard North, Eager Road
0.2 mi
·
22 sec
·
Brentwood Boulevard North, Eager Road
8
Keep slight left to continue on Eager Road
512 ft
·
11 sec
·
Eager Road
9
Continue on Eager Road
0.1 mi
·
14 sec
·
Eager Road
10
Turn left onto Eager Road
0.4 mi
·
49 sec
·
Eager Road
11
Turn slight right
512 ft
·
19 sec
12
Keep slight left
138 ft
·
5 sec
13
Turn right onto South Hanley Road
1.6 mi
·
3 min
·
South Hanley Road
14
Continue on Laclede Station Road
3.6 mi
·
6 min
·
Laclede Station Road
15
Turn left onto South Rock Hill Road
0.4 mi
·
52 sec
·
South Rock Hill Road
16
Turn right onto Valcour Avenue
0.2 mi
·
34 sec
·
Valcour Avenue
17
Turn left onto Gravois Road
0.2 mi
·
19 sec
·
Gravois Road
18
Turn right
39 ft
·
8 sec
19
Turn left
89 ft
·
6 sec
20
Arrive at your destination
Trip Plan
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 9.9 miles from Florissant, MO, or about 15m into the drive.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 19.8 miles or 31m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 9.9 miles or 15m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 27m
Traffic, exits, and arrival timing usually matter more near Affton, MO than in the middle of the route.
Before You Leave
+
Have your navigation ready before leaving Florissant, MO.
Day 1
Settle into the route from Florissant, MO
This is one driving day of about 19.8 miles and 31m.
At 19.8 miles this is a quick drive — no planned stops needed.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 9.9 mi from Florissant, MO · 15m into the drive
Pacing Suggestions
Fuel and coffee
A short stop after about 19.8 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 9.9 miles from Florissant, MO, which is a good place for a longer meal and fuel stop.
Arriving in Affton, MO
Allow a few extra minutes for the final approach into Affton, MO if you are unfamiliar with the area.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$3.10 one way
$6.19 round trip
$3.97/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $3.40 | $6.80 |
| premium | $4.89 | $3.81 | $7.62 |
| diesel | $5.61 | $4.37 | $8.74 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$3
Meals
$25–$50
Total
$28–$53
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 6.9 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 | 5.9 | 0 | $2.08 | $0.95 |
| Efficient EV | 5 | 0 | $1.73 | $0.79 |
| EV Truck/SUV | 7.9 | 0 | $2.77 | $1.27 |
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
Affton, MO
Evening in Affton on Wednesday
Local time
5:57 PM
CDT
Current temp
75°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
17 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
31m 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 Florissant, MO to Affton, MO covers 19.8 miles and takes about 31m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Dunn Road, I 270 West, Rosemary Straub Davison Highway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 9.9 miles from Florissant, MO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $3.10 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.
The drive from Florissant, MO to Affton, MO is easy. At 31m with 0% highway, most drivers will find it relaxed and low-stress.
This route does not have any notably tricky sections. Most of the drive from Florissant, MO to Affton, MO is straightforward, with well-signed roads and simple exits.
The route from Florissant, MO to Affton, MO does not surface many named destination signs beyond the main corridor.
Was this route helpful?
Thanks for your feedback!
Your tip has been submitted. Thanks!
/500
Recent Tips
·
Explore More
Continue From Affton, MO
More trips to Affton, MO
Explore more options from Florissant, MO or browse trips ending in Affton, MO.
Looking for more statewide routes? Browse MO road trips.
Explore maps for Florissant, MO or Affton, MO on MapSof.net.