How far is Florissant, MO from Troy, MO?
The driving distance from Florissant, MO to Troy, MO is about 46.2 miles (74.4 km), with a travel time of about 01h 01m by car.
- The straight-line flight distance is about 37.8 miles (60.8 km).
- For a round trip, plan for roughly 02h 03m 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 01h 01m.
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.
Showers And Thunderstorms
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Florissant and Troy.
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant and Troy.
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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
3.7 mi · 5 min · Rosemary Straub Davison Highway
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6
Take the exit slight right toward I 70: Saint Louis, Kansas City
1492 ft · 26 sec
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7
Continue on I 70: Saint Louis, Kansas City
2478 ft · 43 sec
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8
Keep slight right to continue on I 70 West: Kansas City
2439 ft · 42 sec
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9
Merge slight left
21.6 mi · 27 min
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10
Take the exit slight right toward US 61 North: Hannibal
2234 ft · 48 sec
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11
Merge slight left onto Avenue of the Saints
14.7 mi · 18 min · Avenue of the Saints
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12
Take the exit slight right toward MO 47: Troy, Winfield
933 ft · 23 sec
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13
Keep slight left to continue on MO 47 South: Troy
50 m · 7 sec
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14
Turn left
1499 ft · 52 sec
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15
Turn left onto North Lincoln Drive
1334 ft · 30 sec · North Lincoln Drive
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16
Turn right onto East Cherry Street
2220 ft · 44 sec · East Cherry Street
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17
Enter the roundabout and take exit 2 toward East Cherry Street
20 m · 2 sec · East Cherry Street
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18
Exit the roundabout onto East Cherry Street
1052 ft · 27 sec · East Cherry Street
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19
Turn left onto 2nd Street
30 m · 6 sec · 2nd Street
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20
Turn right
30 m · 7 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Florissant and Troy.
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 West
Merge slight left
21.6 mi · 00h 27m
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.
Showers And Thunderstorms leaving Florissant and Showers And Thunderstorms near Troy.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Florissant to Troy?
The road trip is about 46.2 miles (74.4 km) and usually takes 01h 01m 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 23.1 miles from Florissant and 23.1 miles from Troy.
How much longer is the road route than the straight-line distance?
The direct path is about 37.8 miles (60.8 km), while the road route adds roughly 8.4 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 4:26 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.15 one way or $12.29 round trip. Estimated CO2 is about 14.5 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Florissant and Showers And Thunderstorms near Troy.
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 Florissant and Troy. Straight-line distance: 37.75 mi (60.76 km).
#1 Florissant
The most populous city in St.
| Population | 50,795 |
| Coordinates | 38.7892200, -90.3226100 |
| Altitude | 175 |
| Country | United States |
#2 Troy
City in Lincoln County, Montana, USA
| Population | 13,341 |
| Coordinates | 38.9794900, -90.9807000 |
| Altitude | 165 |
| Country | United States |
End: Troy (-90.9807, 38.97949)
Estimated Travel Time
Distance: 74 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 32m |
| 40 mph (64.37 km/h) | 01h 09m |
| 50 mph (80.47 km/h) | 00h 55m |
| 60 mph (96.56 km/h) | 00h 46m |
| 70 mph (112.65 km/h) | 00h 39m |
| 80 mph (129 km/h) | 00h 34m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $6.15 | $12.29 |
| Mid-grade | $4.25 | $6.93 | $13.86 |
| Premium | $4.65 | $7.59 | $15.17 |
| Diesel | $5.30 | $8.65 | $17.29 |
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.