How far is Warrenton, MO from Florissant, MO?
The driving distance from Warrenton, MO to Florissant, MO is about 49.5 miles (79.7 km), with a travel time of about 00h 48m by car.
- The straight-line flight distance is about 44.1 miles (71 km).
- For a round trip, plan for roughly 01h 37m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 48m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
The most populous city in St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Warrenton and Florissant.
Turn-by-Turn Driving Directions
Step-by-step road directions between Warrenton and Florissant.
-
1
Start on East Booneslick Road
7 m · 4 sec · East Booneslick Road
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2
Turn right
1.2 km · 2 min
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3
Take the ramp right toward I 70 East, US 40 East: Saint Louis, Wright City
1046 ft · 22 sec
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4
Merge slight left
38.5 mi · 50 min
-
5
Take the exit slight right toward I 270: Chicago, Memphis
872 ft · 12 sec
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6
Keep slight left to continue on I 270 North: Chicago
2556 ft · 36 sec
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7
Continue on I 270 North: Chicago
1270 ft · 18 sec
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8
Keep slight left to continue on I 270 North: Chicago
988 ft · 14 sec
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9
Merge slight left
4.2 mi · 5 min
-
10
Take the exit slight right toward US 67
1565 ft · 45 sec
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11
Turn left onto North Lindbergh Boulevard
1.8 mi · 3 min · North Lindbergh Boulevard
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12
Turn right onto West Washington Street
1 mi · 2 min · West Washington Street
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13
Turn left onto North New Florissant Road
26 m · 1 sec · North New Florissant Road
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14
Arrive at your destination
0 m · 1 sec · North New Florissant Road
Car Route Details
A richer read on the saved driving route between Warrenton and Florissant.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 70 East
Merge slight left
38.5 mi · 00h 50m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny leaving Warrenton 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 Warrenton to Florissant?
The road trip is about 49.5 miles (79.7 km) and usually takes 00h 48m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
O'Fallon is a useful midpoint, sitting about 23.9 miles from Warrenton and 25.6 miles from Florissant.
How much longer is the road route than the straight-line distance?
The direct path is about 44.1 miles (71 km), while the road route adds roughly 5.4 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 4:52 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.60 one way or $13.20 round trip. Estimated CO2 is about 15.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Warrenton and Mostly Sunny near Florissant.
Stop Ideas Near O'Fallon
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Park
City of O'Fallon
Swingley Ridge @ Chesterfield City Hall SB
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to O'Fallon.
Kirkwood
Washington
Gateway Transportation Center
Alton
Flight Path Map
This map shows the direct air route between Warrenton and Florissant. Straight-line distance: 44.12 mi (71.01 km).
#1 Warrenton
City in Warren County, Missouri, United States
| Population | 8,913 |
| Coordinates | 38.8114400, -91.1415400 |
| Altitude | 270 |
| 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: 80 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 38m |
| 40 mph (64.37 km/h) | 01h 14m |
| 50 mph (80.47 km/h) | 00h 59m |
| 60 mph (96.56 km/h) | 00h 49m |
| 70 mph (112.65 km/h) | 00h 42m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $6.60 | $13.20 |
| Mid-grade | $4.25 | $7.44 | $14.89 |
| Premium | $4.65 | $8.14 | $16.29 |
| Diesel | $5.30 | $9.28 | $18.56 |
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 26, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.