How far is Florissant, MO from Clayton, MO?
The driving distance from Florissant, MO to Clayton, MO is about 12.8 miles (20.6 km), with a travel time of about 00h 20m by car.
- The straight-line flight distance is about 10.1 miles (16.3 km).
- For a round trip, plan for roughly 00h 41m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 00h 20m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Florissant and Clayton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant and Clayton.
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1
Start on North New Florissant Road
1.2 mi · 2 min · North New Florissant Road
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2
Turn right onto Dunn Road
1088 ft · 29 sec · Dunn Road
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3
Take the ramp straight toward I 270 West
1267 ft · 31 sec
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4
Merge slight left onto Rosemary Straub Davison Highway
2574 ft · 37 sec · Rosemary Straub Davison Highway
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5
Take the exit slight right toward I 170 South: Clayton
2751 ft · 47 sec
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6
Continue on Inner Belt Expressway
4.7 mi · 6 min · Inner Belt Expressway
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7
Take the exit slight right toward MO 180: Saint Charles Rock Road
755 ft · 16 sec
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8
Keep slight left to continue on MO 180: Saint Charles Rock Road
130 m · 11 sec
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9
Turn left onto Saint Charles Rock Road
1.2 km · 1 min · Saint Charles Rock Road
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10
Turn right onto North Hanley Road
3.9 mi · 7 min · North Hanley Road
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11
Turn left onto Wydown Boulevard
3050 ft · 1 min · Wydown Boulevard
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12
Turn right onto Hillvale Drive
54 m · 8 sec · Hillvale Drive
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13
Arrive at your destination
0 m · 1 sec · Hillvale Drive
Car Route Details
A richer read on the saved driving route between Florissant and Clayton.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Inner Belt Expressway
Continue on Inner Belt Expressway
4.69 mi · 00h 06m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Mostly Cloudy then Chance Showers And Thunderstorms leaving Florissant and Mostly Cloudy then Chance Rain Showers near Clayton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Florissant to Clayton?
The road trip is about 12.8 miles (20.6 km) and usually takes 00h 20m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Bel-Ridge is a useful midpoint, sitting about 6.4 miles from Florissant and 6.4 miles from Clayton.
How much longer is the road route than the straight-line distance?
The direct path is about 10.1 miles (16.3 km), while the road route adds roughly 2.7 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 7:00 AM to 7:00 PM CDT. If you want a more comfortable same-day return, try to leave by 7:48 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $1.70 one way or $3.39 round trip. Estimated CO2 is about 4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy then Chance Showers And Thunderstorms around Florissant and Mostly Cloudy then Chance Rain Showers near Clayton.
Stop Ideas Near Bel-Ridge
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Bel-Ridge.
Gateway Transportation Center
Kirkwood
Alton
Washington
Flight Path Map
This map shows the direct air route between Florissant and Clayton. Straight-line distance: 10.13 mi (16.31 km).
#1 Florissant
The most populous city in St.
| Population | 50,795 |
| Coordinates | 38.7892200, -90.3226100 |
| Altitude | 175 |
| Country | United States |
#2 Clayton
Inner-ring suburb of St.
| Population | 16,775 |
| Coordinates | 38.6425500, -90.3237300 |
| Altitude | 173 |
| Country | United States |
End: Clayton (-90.32373, 38.64255)
Estimated Travel Time
Distance: 21 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 25m |
| 40 mph (64.37 km/h) | 00h 19m |
| 50 mph (80.47 km/h) | 00h 15m |
| 60 mph (96.56 km/h) | 00h 12m |
| 70 mph (112.65 km/h) | 00h 10m |
| 80 mph (129 km/h) | 00h 09m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $1.70 | $3.39 |
| Mid-grade | $4.25 | $1.91 | $3.83 |
| Premium | $4.65 | $2.09 | $4.19 |
| Diesel | $5.30 | $2.39 | $4.77 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Missouri · Apr 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.