How far is Wentzville, MO from Union, MO?
The driving distance from Wentzville, MO to Union, MO is about 30.9 miles (49.7 km), with a travel time of about 00h 49m by car.
- The straight-line flight distance is about 26.3 miles (42.4 km).
- For a round trip, plan for roughly 01h 39m 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 49m.
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.
City in Missouri
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 Wentzville and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Wentzville and Union.
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1
Start on East Allen Street
12 m · 8 sec · East Allen Street
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2
Turn left onto North Linn Avenue
706 ft · 26 sec · North Linn Avenue
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3
Turn right onto West 4th Street
135 m · 20 sec · West 4th Street
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4
Turn left onto South Church Street
1031 ft · 36 sec · South Church Street
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5
Enter the roundabout and take exit 2 toward South Church Street
30 m · 4 sec · South Church Street
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6
Exit the roundabout onto South Church Street
1 mi · 2 min · South Church Street
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7
Continue straight
1.4 mi · 2 min
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8
Continue straight
4.9 mi · 7 min
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9
Turn right
4.9 mi · 8 min
-
10
At the end of the road, turn left
3.1 mi · 4 min
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11
Continue straight
3.6 mi · 6 min
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12
Continue straight
1.1 km · 2 min
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13
At the end of the road, turn left
10 mi · 15 min
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14
Turn right onto East Independence Drive
63 m · 7 sec · East Independence Drive
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15
Turn left onto North Church Street
1.1 km · 2 min · North Church Street
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16
Turn right onto East Park Avenue
900 ft · 31 sec · East Park Avenue
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17
Turn left
19 m · 5 sec
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18
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Wentzville 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.
Longest stretch
At the end of the road, turn left
9.98 mi · 00h 15m
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 Wentzville 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 Wentzville to Union?
The road trip is about 30.9 miles (49.7 km) and usually takes 00h 49m 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?
Marthasville is a useful midpoint, sitting about 15.5 miles from Wentzville and 15.4 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 26.3 miles (42.4 km), while the road route adds roughly 4.6 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 4:50 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.11 one way or $8.22 round trip. Estimated CO2 is about 9.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Wentzville and Mostly Sunny near Union.
Stop Ideas Near Marthasville
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Park
Wentzville City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Marthasville.
Washington
Hermann
Kirkwood
Gateway Transportation Center
Flight Path Map
This map shows the direct air route between Wentzville and Union. Straight-line distance: 26.35 mi (42.4 km).
#1 Wentzville
A city in St.
| Population | 43,109 |
| Coordinates | 38.8114400, -90.8529100 |
| Altitude | 190 |
| 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: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 01m |
| 40 mph (64.37 km/h) | 00h 46m |
| 50 mph (80.47 km/h) | 00h 37m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $4.11 | $8.22 |
| Mid-grade | $4.25 | $4.64 | $9.27 |
| Premium | $4.65 | $5.07 | $10.15 |
| Diesel | $5.30 | $5.78 | $11.56 |
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 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.