How far is Chesterfield, MO from Saint John, MO?
The driving distance from Chesterfield, MO to Saint John, MO is about 20.6 miles (33.2 km), with a travel time of about 00h 28m by car.
- The straight-line flight distance is about 12.9 miles (20.8 km).
- For a round trip, plan for roughly 00h 57m 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 28m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Missouri, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Chesterfield and Saint John.
Turn-by-Turn Driving Directions
Step-by-step road directions between Chesterfield and Saint John.
-
1
Start on Santa Maria Drive
33 m · 8 sec · Santa Maria Drive
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2
Turn left onto Old Chesterfield Road
751 ft · 33 sec · Old Chesterfield Road
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3
Turn right onto Baxter Road
1507 ft · 37 sec · Baxter Road
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4
Take the ramp slight right toward I 64 East, US 40 East, US 61 South
924 ft · 23 sec
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5
Merge slight left onto Avenue of the Saints
9.4 mi · 12 min · Avenue of the Saints
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6
Continue on Daniel Boone Expressway
3.2 mi · 4 min · Daniel Boone Expressway
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7
Take the exit slight right toward I 170 North
897 ft · 13 sec
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8
Keep slight right to continue on I 170 North
3028 ft · 1 min
-
9
Continue on Inner Belt Expressway
5.4 mi · 7 min · Inner Belt Expressway
-
10
Take the exit slight right toward MO 180: Saint Charles Rock Road
816 ft · 17 sec
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11
Keep slight left to continue on MO 180 West: Saint Charles Rock Road
135 m · 12 sec
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12
Turn straight onto Saint Charles Rock Road
3068 ft · 1 min · Saint Charles Rock Road
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13
Turn right onto Marshall Road
1922 ft · 1 min · Marshall Road
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14
Turn right onto Mavis Place
99 m · 14 sec · Mavis Place
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15
Arrive at your destination
0 m · 1 sec · Mavis Place
Car Route Details
A richer read on the saved driving route between Chesterfield and Saint John.
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.
Avenue of the Saints
Merge slight left onto Avenue of the Saints
9.43 mi · 00h 12m
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.
Mostly Cloudy leaving Chesterfield and Showers And Thunderstorms Likely near Saint John.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Chesterfield to Saint John?
The road trip is about 20.6 miles (33.2 km) and usually takes 00h 28m 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?
Frontenac is a useful midpoint, sitting about 10.3 miles from Chesterfield and 10.3 miles from Saint John.
How much longer is the road route than the straight-line distance?
The direct path is about 12.9 miles (20.8 km), while the road route adds roughly 7.7 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 7:32 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.75 one way or $5.51 round trip. Estimated CO2 is about 6.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Chesterfield and Showers And Thunderstorms Likely near Saint John.
Stop Ideas Near Frontenac
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 Frontenac.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Chesterfield and Saint John. Straight-line distance: 12.95 mi (20.84 km).
#1 Chesterfield
A city in St.
| Population | 47,570 |
| Coordinates | 38.6631100, -90.5770700 |
| Altitude | 144 |
| Country | United States |
#2 Saint John
City in Missouri, USA
| Population | 6,319 |
| Coordinates | 38.7148400, -90.3462700 |
| Altitude | 196 |
| Country | United States |
End: Saint John (-90.34627, 38.71484)
Estimated Travel Time
Distance: 33 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 41m |
| 40 mph (64.37 km/h) | 00h 30m |
| 50 mph (80.47 km/h) | 00h 24m |
| 60 mph (96.56 km/h) | 00h 20m |
| 70 mph (112.65 km/h) | 00h 17m |
| 80 mph (129 km/h) | 00h 15m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $2.75 | $5.51 |
| Mid-grade | $4.25 | $3.10 | $6.21 |
| Premium | $4.65 | $3.40 | $6.79 |
| Diesel | $5.30 | $3.87 | $7.74 |
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 29, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.