How far is Mount Vernon, MO from Florissant, MO?
The driving distance from Mount Vernon, MO to Florissant, MO is about 254.1 miles (408.9 km), with a travel time of about 03h 54m by car.
- The straight-line flight distance is about 223.3 miles (359.3 km).
- For a round trip, plan for roughly 07h 49m 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 03h 54m.
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.
Chance Showers And Thunderstorms then Mostly Sunny
Scattered Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Mount Vernon and Florissant.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mount Vernon and Florissant.
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1
Start on the route
73 m · 24 sec
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2
Turn sharp right
8 m · 9 sec
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3
Turn sharp left onto Market Street
1 km · 2 min · Market Street
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4
Turn left onto East Mount Vernon Boulevard
1.5 km · 2 min · East Mount Vernon Boulevard
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5
Take the ramp left toward I 44 East: Springfield
229 mi · 4 hr 9 min
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6
Take the exit slight right toward I 270: Chicago, Memphis
871 ft · 19 sec
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7
Keep slight left to continue on I 270 North: Chicago
551 ft · 12 sec
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8
Continue on I 270 North: Chicago
2638 ft · 53 sec
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9
Merge slight left
18.8 mi · 24 min
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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 Mount Vernon 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 44 East
Take the ramp left toward I 44 East: Springfield
229 mi · 04h 09m
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.
Chance Showers And Thunderstorms then Mostly Sunny leaving Mount Vernon and Scattered 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 Mount Vernon to Florissant?
The road trip is about 254.1 miles (408.9 km) and usually takes 03h 54m 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 126.5 miles from Mount Vernon and 127.6 miles from Florissant.
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 30.8 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 9:10 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.83 one way or $67.65 round trip. Estimated CO2 is about 79.7 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms then Mostly Sunny around Mount Vernon and Scattered Showers And Thunderstorms near Florissant.
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 Mount Vernon and Florissant. Straight-line distance: 223.23 mi (359.26 km).
#1 Mount Vernon
City in Missouri
| Population | 4,477 |
| Coordinates | 37.1036700, -93.8185400 |
| Altitude | 369 |
| 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: 409 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 27m |
| 40 mph (64.37 km/h) | 06h 21m |
| 50 mph (80.47 km/h) | 05h 04m |
| 60 mph (96.56 km/h) | 04h 14m |
| 70 mph (112.65 km/h) | 03h 37m |
| 80 mph (129 km/h) | 03h 10m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $33.83 | $67.65 |
| Mid-grade | $4.25 | $38.15 | $76.30 |
| Premium | $4.65 | $41.75 | $83.49 |
| Diesel | $5.30 | $47.58 | $95.15 |
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.