How far is Affton, MO from Florissant, MO?
The driving distance from Affton, MO to Florissant, MO is about 19.8 miles (31.8 km), with a travel time of about 00h 31m by car.
- The straight-line flight distance is about 16.5 miles (26.5 km).
- For a round trip, plan for roughly 01h 02m 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 31m.
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.
City in Saint Louis County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Affton and Florissant.
Turn-by-Turn Driving Directions
Step-by-step road directions between Affton and Florissant.
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1
Start on the route
81 m · 20 sec
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2
Turn slight right
20 m · 5 sec
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3
Turn right onto Gravois Road
64 m · 11 sec · Gravois Road
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4
Turn left onto South Rock Hill Road
1 km · 2 min · South Rock Hill Road
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5
Turn slight right
43 m · 4 sec
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6
Turn straight onto Laclede Station Road
3.5 mi · 6 min · Laclede Station Road
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7
Continue on South Hanley Road
1.6 mi · 3 min · South Hanley Road
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8
Turn slight right onto Eager Road
3052 ft · 1 min · Eager Road
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9
Take the ramp slight right toward I 170 North
2323 ft · 34 sec
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10
Merge slight right onto Inner Belt Expressway
9.3 mi · 12 min · Inner Belt Expressway
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11
Take the exit slight right toward North Hanley Road
952 ft · 23 sec
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12
Turn left onto North Hanley Road
1 mi · 2 min · North Hanley Road
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13
Continue on Graham Road
2820 ft · 1 min · Graham Road
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14
Turn right onto West Saint Anthony Lane
1.1 km · 2 min · West Saint Anthony Lane
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15
Turn left onto South New Florissant Road
3230 ft · 1 min · South New Florissant Road
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16
Arrive at your destination
0 m · 1 sec · North New Florissant Road
Car Route Details
A richer read on the saved driving route between Affton and Florissant.
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
Merge slight right onto Inner Belt Expressway
9.35 mi · 00h 12m
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.
Showers And Thunderstorms leaving Affton and Showers And Thunderstorms near Florissant.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Affton to Florissant?
The road trip is about 19.8 miles (31.8 km) and usually takes 00h 31m 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?
Olivette is a useful midpoint, sitting about 9.6 miles from Affton and 10.1 miles from Florissant.
How much longer is the road route than the straight-line distance?
The direct path is about 16.5 miles (26.5 km), while the road route adds roughly 3.3 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 7:28 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.64 one way or $5.28 round trip. Estimated CO2 is about 6.2 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Affton and Showers And Thunderstorms near Florissant.
Stop Ideas Near Olivette
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 Olivette.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Affton and Florissant. Straight-line distance: 16.5 mi (26.55 km).
#1 Affton
Census designated place
| Population | 20,307 |
| Coordinates | 38.5506100, -90.3331700 |
| Altitude | 188 |
| Country | United States |
#2 Florissant
The most populous city in St.
| Population | 50,795 |
| Coordinates | 38.7892200, -90.3226100 |
| Altitude | 175 |
| Country | United States |
End: North New Florissant Road (-90.32261, 38.78922)
Estimated Travel Time
Distance: 32 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 39m |
| 40 mph (64.37 km/h) | 00h 29m |
| 50 mph (80.47 km/h) | 00h 23m |
| 60 mph (96.56 km/h) | 00h 19m |
| 70 mph (112.65 km/h) | 00h 16m |
| 80 mph (129 km/h) | 00h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $2.64 | $5.28 |
| Mid-grade | $4.25 | $2.98 | $5.95 |
| Premium | $4.65 | $3.26 | $6.52 |
| Diesel | $5.30 | $3.71 | $7.43 |
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 24, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.