How far is Union, MO from Chesterfield, MO?
The driving distance from Union, MO to Chesterfield, MO is about 34.9 miles (56.2 km), with a travel time of about 00h 47m by car.
- The straight-line flight distance is about 27.6 miles (44.4 km).
- For a round trip, plan for roughly 01h 34m 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 47m.
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 Union and Chesterfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union and Chesterfield.
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1
Start on the route
19 m · 7 sec
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2
Turn right onto East Park Avenue
900 ft · 26 sec · East Park Avenue
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3
Turn right onto North Church Street
1601 ft · 1 min · North Church Street
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4
Turn left onto East Main Street
2119 ft · 1 min · East Main Street
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5
Turn right
157 m · 12 sec
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6
At the end of the road, turn left
2.4 mi · 4 min
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7
Merge slight left
2.5 mi · 3 min
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8
Keep slight left to continue on I 44 East, US 50 East: Saint Louis
6.2 mi · 7 min
-
9
Take the exit slight right toward I 44 Business, MO 100 East: Gray Summit
970 ft · 28 sec
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10
Turn left onto Manchester Road
16.8 mi · 24 min · Manchester Road
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11
Turn left onto Clarkson Road
3.6 mi · 7 min · Clarkson Road
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12
Turn left onto Baxter Road
1.6 mi · 3 min · Baxter Road
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13
Turn right onto Wild Horse Creek Road
598 ft · 23 sec · Wild Horse Creek Road
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14
Turn left onto Santa Maria Drive
1514 ft · 1 min · Santa Maria Drive
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15
Arrive at your destination
0 m · 1 sec · Santa Maria Drive
Car Route Details
A richer read on the saved driving route between Union and Chesterfield.
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.
Manchester Road
Turn left onto Manchester Road
16.8 mi · 00h 24m
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 Union and Mostly Sunny near Chesterfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union to Chesterfield?
The road trip is about 34.9 miles (56.2 km) and usually takes 00h 47m 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?
Pacific is a useful midpoint, sitting about 17.3 miles from Union and 17.6 miles from Chesterfield.
How much longer is the road route than the straight-line distance?
The direct path is about 27.6 miles (44.4 km), while the road route adds roughly 7.3 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 4:56 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.64 one way or $9.28 round trip. Estimated CO2 is about 10.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Union and Mostly Sunny near Chesterfield.
Stop Ideas Near Pacific
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 Pacific.
Washington
Kirkwood
Gateway Transportation Center
Hermann
Flight Path Map
This map shows the direct air route between Union and Chesterfield. Straight-line distance: 27.57 mi (44.37 km).
#1 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 |
#2 Chesterfield
A city in St.
| Population | 47,570 |
| Coordinates | 38.6631100, -90.5770700 |
| Altitude | 144 |
| Country | United States |
End: Santa Maria Drive (-90.576914, 38.663102)
Estimated Travel Time
Distance: 56 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 09m |
| 40 mph (64.37 km/h) | 00h 52m |
| 50 mph (80.47 km/h) | 00h 41m |
| 60 mph (96.56 km/h) | 00h 34m |
| 70 mph (112.65 km/h) | 00h 29m |
| 80 mph (129 km/h) | 00h 26m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $4.64 | $9.28 |
| Mid-grade | $4.25 | $5.23 | $10.46 |
| Premium | $4.65 | $5.72 | $11.45 |
| Diesel | $5.30 | $6.52 | $13.05 |
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.