How far is Florissant, MO from Union, MO?
The driving distance from Florissant, MO to Union, MO is about 55.1 miles (88.6 km), with a travel time of about 01h 14m by car.
- The straight-line flight distance is about 43.8 miles (70.5 km).
- For a round trip, plan for roughly 02h 29m 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 14m.
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.
Unincorporated community 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 Florissant and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Florissant and Union.
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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
24.9 mi · 28 min · Henry Shaw Ozark Corridor
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14
Take the exit slight right toward US 50 West: Union, Jefferson City
1271 ft · 27 sec
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15
Merge slight left
4.8 mi · 7 min
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16
Turn right
157 m · 15 sec
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17
Turn left onto East Main Street
1641 ft · 50 sec · East Main Street
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18
Turn right onto North McKinley Avenue
75 m · 7 sec · North McKinley Avenue
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19
Continue on North McKinley Avenue
119 m · 15 sec · North McKinley Avenue
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20
Continue on East State Street
159 m · 27 sec · East State Street
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21
Turn right onto North Church Street
984 ft · 39 sec · North Church Street
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22
Turn left onto East Park Avenue
900 ft · 31 sec · East Park Avenue
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23
Turn left
19 m · 5 sec
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24
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Florissant and Union.
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.
Henry Shaw Ozark Corridor
Merge slight left onto Henry Shaw Ozark Corridor
24.9 mi · 00h 28m
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 Florissant and Mostly Sunny near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Florissant to Union?
The road trip is about 55.1 miles (88.6 km) and usually takes 01h 14m 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?
Sherman is a useful midpoint, sitting about 27.5 miles from Florissant and 27.6 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 43.8 miles (70.5 km), while the road route adds roughly 11.3 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 4:00 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.32 one way or $14.63 round trip. Estimated CO2 is about 17.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Florissant and Mostly Sunny near Union.
Stop Ideas Near Sherman
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 Sherman.
Kirkwood
Gateway Transportation Center
Washington
Alton
Flight Path Map
This map shows the direct air route between Florissant and Union. Straight-line distance: 43.82 mi (70.52 km).
#1 Florissant
The most populous city in St.
| Population | 50,795 |
| Coordinates | 38.7892200, -90.3226100 |
| Altitude | 175 |
| Country | United States |
#2 Union
City in and county seat of Franklin County, Missouri, United States
| Population | 12,094 |
| Coordinates | 38.4500500, -91.0084800 |
| Altitude | 162 |
| Country | United States |
End: Union (-91.00848, 38.45005)
Estimated Travel Time
Distance: 89 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 50m |
| 40 mph (64.37 km/h) | 01h 22m |
| 50 mph (80.47 km/h) | 01h 06m |
| 60 mph (96.56 km/h) | 00h 55m |
| 70 mph (112.65 km/h) | 00h 47m |
| 80 mph (129 km/h) | 00h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $7.32 | $14.63 |
| Mid-grade | $4.25 | $8.25 | $16.50 |
| Premium | $4.65 | $9.03 | $18.06 |
| Diesel | $5.30 | $10.29 | $20.58 |
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.