How far is Saint Ann, MO from Chesterfield, MO?
The driving distance from Saint Ann, MO to Chesterfield, MO is about 19.5 miles (31.4 km), with a travel time of about 00h 23m by car.
- The straight-line flight distance is about 11.4 miles (18.3 km).
- For a round trip, plan for roughly 00h 47m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 23m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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 St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Saint Ann and Chesterfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Ann and Chesterfield.
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1
Start on San Jose Lane
128 m · 25 sec · San Jose Lane
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2
Turn left onto Saint Charles Rock Road
2 mi · 4 min · Saint Charles Rock Road
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3
Take the ramp right toward I 70 West
1394 ft · 20 sec
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4
Merge slight left
1.1 mi · 1 min
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5
Take the exit slight right toward I 270: Memphis, Chicago
1073 ft · 18 sec
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6
Keep slight left to continue on I 270 South: Memphis
2733 ft · 47 sec
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7
Continue on I 270 South: Memphis
723 ft · 10 sec
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8
Merge slight left
6.9 mi · 9 min
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9
Take the exit slight right toward I 64, US 40, US 61: Saint Louis, Wentzville
840 ft · 18 sec
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10
Keep slight right to continue on I 64 West, US 40 West, US 61 North: Wentzville
1052 ft · 23 sec
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11
Continue on I 64 West, US 40 West, US 61 North: Wentzville
674 ft · 10 sec
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12
Merge slight left onto Avenue of the Saints
5.9 mi · 7 min · Avenue of the Saints
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13
Take the exit slight right toward Chesterfield Parkway West
116 m · 8 sec
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14
Turn straight onto North Outer 40
2036 ft · 56 sec · North Outer 40
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15
Turn left onto Chesterfield Parkway West
607 ft · 27 sec · Chesterfield Parkway West
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16
Turn right
1674 ft · 33 sec
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17
Turn straight onto Wild Horse Creek Road
48 m · 4 sec · Wild Horse Creek Road
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18
Turn right onto Old Chesterfield Road
1576 ft · 1 min · Old Chesterfield Road
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19
Turn left onto Santa Maria Drive
33 m · 5 sec · Santa Maria Drive
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20
Arrive at your destination
0 m · 1 sec · Santa Maria Drive
Car Route Details
A richer read on the saved driving route between Saint Ann 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.
I 270 South
Merge slight left
6.87 mi · 00h 09m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving Saint Ann and Sunny near Chesterfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint Ann to Chesterfield?
The road trip is about 19.5 miles (31.4 km) and usually takes 00h 23m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Creve Coeur is a useful midpoint, sitting about 9.4 miles from Saint Ann and 10.1 miles from Chesterfield.
How much longer is the road route than the straight-line distance?
The direct path is about 11.4 miles (18.3 km), while the road route adds roughly 8.1 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 7:00 AM to 7:00 PM CDT. If you want a more comfortable same-day return, try to leave by 7:42 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.60 one way or $5.20 round trip. Estimated CO2 is about 6.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Saint Ann and Sunny near Chesterfield.
Stop Ideas Near Creve Coeur
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 Creve Coeur.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Saint Ann and Chesterfield. Straight-line distance: 11.36 mi (18.28 km).
#1 Saint Ann
City in Saint Louis County, Missouri, United States
| Population | 12,583 |
| Coordinates | 38.7272700, -90.3831700 |
| Altitude | 177 |
| 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: 31 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 39m |
| 40 mph (64.37 km/h) | 00h 29m |
| 50 mph (80.47 km/h) | 00h 23m |
| 60 mph (96.56 km/h) | 00h 19m |
| 70 mph (112.65 km/h) | 00h 16m |
| 80 mph (129 km/h) | 00h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $2.60 | $5.20 |
| Mid-grade | $4.25 | $2.93 | $5.87 |
| Premium | $4.65 | $3.21 | $6.42 |
| Diesel | $5.30 | $3.66 | $7.32 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.