How far is Lemay, MO from Florissant, MO?
The driving distance from Lemay, MO to Florissant, MO is about 26.8 miles (43.1 km), with a travel time of about 00h 33m by car.
- The straight-line flight distance is about 17.8 miles (28.7 km).
- For a round trip, plan for roughly 01h 07m 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 33m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Inner-ring suburb of St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Lemay and Florissant.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lemay and Florissant.
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1
Start on Rembold Avenue
61 m · 14 sec · Rembold Avenue
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2
Turn left onto Placid Avenue
106 m · 16 sec · Placid Avenue
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3
Turn left onto Gentry Avenue
827 ft · 24 sec · Gentry Avenue
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4
Continue on Military Road
1.2 km · 2 min · Military Road
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5
At the end of the road, turn right onto Lemay Ferry Road
682 ft · 23 sec · Lemay Ferry Road
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6
Turn left onto River City Boulevard
3065 ft · 1 min · River City Boulevard
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7
Continue on Carondelet Boulevard
1.3 km · 2 min · Carondelet Boulevard
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8
Continue on River Des Peres Boulevard
3.1 mi · 6 min · River Des Peres Boulevard
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9
Turn right onto Lansdowne Avenue
665 ft · 25 sec · Lansdowne Avenue
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10
Turn left onto Wabash Avenue
1841 ft · 37 sec · Wabash Avenue
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11
Continue on Wellington Avenue
1744 ft · 35 sec · Wellington Avenue
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12
Continue on Ellendale Avenue
2847 ft · 57 sec · Ellendale Avenue
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13
Continue on McCausland Avenue
1.6 mi · 3 min · McCausland Avenue
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14
Turn left onto I 64 West, US 40 West
1061 ft · 26 sec
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15
Merge slight left onto Daniel Boone Expressway
1.5 mi · 2 min · Daniel Boone Expressway
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16
Take the exit slight right toward I 170 North: Airport
2418 ft · 51 sec
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17
Continue on Inner Belt Expressway
9.5 mi · 12 min · Inner Belt Expressway
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18
Take the exit slight right toward North Hanley Road
952 ft · 23 sec
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19
Turn left onto North Hanley Road
1 mi · 2 min · North Hanley Road
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20
Continue on Graham Road
2820 ft · 1 min · Graham Road
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21
Turn right onto West Saint Anthony Lane
1.1 km · 2 min · West Saint Anthony Lane
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22
Turn left onto South New Florissant Road
3230 ft · 1 min · South New Florissant Road
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23
Arrive at your destination
0 m · 1 sec · North New Florissant Road
Car Route Details
A richer read on the saved driving route between Lemay 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
Continue on Inner Belt Expressway
9.54 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.
Sunny leaving Lemay and Mostly Sunny near Florissant.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lemay to Florissant?
The road trip is about 26.8 miles (43.1 km) and usually takes 00h 33m 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?
Clayton is a useful midpoint, sitting about 11.7 miles from Lemay and 15.2 miles from Florissant.
How much longer is the road route than the straight-line distance?
The direct path is about 17.8 miles (28.7 km), while the road route adds roughly 9 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 7:22 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.58 one way or $7.16 round trip. Estimated CO2 is about 8.4 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Lemay and Mostly Sunny near Florissant.
Stop Ideas Near Clayton
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 Clayton.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Lemay and Florissant. Straight-line distance: 17.83 mi (28.69 km).
#1 Lemay
Census designated place
| Population | 16,645 |
| Coordinates | 38.5333900, -90.2792800 |
| Altitude | 144 |
| 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: 43 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 53m |
| 40 mph (64.37 km/h) | 00h 40m |
| 50 mph (80.47 km/h) | 00h 32m |
| 60 mph (96.56 km/h) | 00h 26m |
| 70 mph (112.65 km/h) | 00h 22m |
| 80 mph (129 km/h) | 00h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $3.58 | $7.16 |
| Mid-grade | $4.25 | $4.04 | $8.08 |
| Premium | $4.65 | $4.42 | $8.84 |
| Diesel | $5.30 | $5.04 | $10.08 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.