How far is Florissant, MO from Mount Vernon, MO?
The driving distance from Florissant, MO to Mount Vernon, MO is about 251 miles (403.9 km), with a travel time of about 04h 44m by car.
- The straight-line flight distance is about 223.3 miles (359.3 km).
- For a round trip, plan for roughly 09h 28m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 04h 44m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Phelps County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Scattered Showers And Thunderstorms
Chance Showers And Thunderstorms then Mostly Sunny
Driving Route Map
The map below follows the saved road route between Florissant and Mount Vernon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant and Mount Vernon.
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1
Start on North New Florissant Road
26 m · 6 sec · North New Florissant Road
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2
Turn right onto Washington Street
1 mi · 2 min · Washington Street
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3
Turn left onto Lindbergh Boulevard
1.7 mi · 3 min · Lindbergh Boulevard
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4
Take the ramp slight right
1912 ft · 47 sec
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5
Merge slight left onto Rosemary Straub Davison Highway
16.1 mi · 20 min · Rosemary Straub Davison Highway
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6
Take the exit slight right toward Dougherty Ferry Road
1331 ft · 28 sec
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7
Turn right onto Dougherty Ferry Road
2.5 mi · 5 min · Dougherty Ferry Road
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8
Continue on Forest Avenue
1.6 km · 2 min · Forest Avenue
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9
Turn left
1.2 km · 1 min
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10
Take the exit slight right
32 m · 3 sec
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11
Turn right onto North Highway Drive
748 ft · 14 sec · North Highway Drive
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12
Take the ramp straight toward I 44 West, US 50 West: Rolla
936 ft · 13 sec
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13
Merge slight left onto Henry Shaw Ozark Corridor
225.1 mi · 4 hr 4 min · Henry Shaw Ozark Corridor
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14
Take the exit slight right toward MO 39, MO 265, I 44 Business: Aurora, Mount Vernon
1208 ft · 32 sec
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15
Turn right onto East Mount Vernon Boulevard
1.3 km · 1 min · East Mount Vernon Boulevard
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16
Turn slight right
43 m · 5 sec
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17
Turn slight right onto South Market Street
3049 ft · 1 min · South Market Street
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18
Turn left onto West Dallas Street
49 m · 9 sec · West Dallas Street
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19
Turn right
52 m · 15 sec
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20
Turn right onto West Center Street
50 m · 7 sec · West Center Street
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21
Turn slight right
8 m · 9 sec
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22
Turn sharp left
73 m · 18 sec
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23
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Florissant and Mount Vernon.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Henry Shaw Ozark Corridor
Merge slight left onto Henry Shaw Ozark Corridor
225 mi · 04h 04m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Scattered Showers And Thunderstorms leaving Florissant and Chance Showers And Thunderstorms then Mostly Sunny near Mount Vernon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Florissant to Mount Vernon?
The road trip is about 251 miles (403.9 km) and usually takes 04h 44m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Newburg is a useful midpoint, sitting about 125.4 miles from Florissant and 125.6 miles from Mount Vernon.
How much longer is the road route than the straight-line distance?
The direct path is about 223.3 miles (359.3 km), while the road route adds roughly 27.7 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 7:32 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.41 one way or $66.82 round trip. Estimated CO2 is about 78.7 kg one way.
What should you check before leaving?
Before you leave, expect Scattered Showers And Thunderstorms around Florissant and Chance Showers And Thunderstorms then Mostly Sunny near Mount Vernon.
Stop Ideas Near Newburg
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 Newburg.
Jefferson City
Hermann
Washington
Flight Path Map
This map shows the direct air route between Florissant and Mount Vernon. Straight-line distance: 223.23 mi (359.26 km).
#1 Florissant
The most populous city in St.
| Population | 50,795 |
| Coordinates | 38.7892200, -90.3226100 |
| Altitude | 175 |
| Country | United States |
#2 Mount Vernon
City in Missouri
| Population | 4,477 |
| Coordinates | 37.1036700, -93.8185400 |
| Altitude | 369 |
| Country | United States |
End: Mount Vernon (-93.81854, 37.10367)
Estimated Travel Time
Distance: 404 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 21m |
| 40 mph (64.37 km/h) | 06h 16m |
| 50 mph (80.47 km/h) | 05h 01m |
| 60 mph (96.56 km/h) | 04h 10m |
| 70 mph (112.65 km/h) | 03h 35m |
| 80 mph (129 km/h) | 03h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $33.41 | $66.82 |
| Mid-grade | $4.25 | $37.68 | $75.36 |
| Premium | $4.65 | $41.23 | $82.47 |
| Diesel | $5.30 | $46.99 | $93.99 |
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 · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.