How far is Castle Point, MO from Saint John, MO?
The driving distance from Castle Point, MO to Saint John, MO is about 9.8 miles (15.8 km), with a travel time of about 00h 16m by car.
- The straight-line flight distance is about 6.1 miles (9.8 km).
- For a round trip, plan for roughly 00h 33m 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 16m.
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.
Suburb of St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Castle Point and Saint John.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Point and Saint John.
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1
Start on Lord Drive
2556 ft · 2 min · Lord Drive
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2
At the end of the road, turn right onto Chambers Road
2.8 mi · 4 min · Chambers Road
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3
Continue on Hereford Avenue
2206 ft · 39 sec · Hereford Avenue
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4
Continue on Airport Road
1.8 mi · 3 min · Airport Road
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5
Take the ramp left toward I 170 South
1378 ft · 20 sec
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6
Merge slight left onto Inner Belt Expressway
2.8 mi · 3 min · Inner Belt Expressway
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7
Take the exit slight right toward MO 180: Saint Charles Rock Road
755 ft · 16 sec
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8
Keep slight right to continue on MO 180: Saint Charles Rock Road
117 m · 10 sec
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9
Turn slight right onto Saint Charles Rock Road
2803 ft · 1 min · Saint Charles Rock Road
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10
Turn right onto Marshall Road
1922 ft · 1 min · Marshall Road
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11
Turn right onto Mavis Place
99 m · 14 sec · Mavis Place
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12
Arrive at your destination
0 m · 1 sec · Mavis Place
Car Route Details
A richer read on the saved driving route between Castle Point 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.
Chambers Road
At the end of the road, turn right onto Chambers Road
2.83 mi · 00h 04m
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.
Slight Chance Rain Showers leaving Castle Point 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 Castle Point to Saint John?
The road trip is about 9.8 miles (15.8 km) and usually takes 00h 16m 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?
Berkeley is a useful midpoint, sitting about 4.9 miles from Castle Point and 4.9 miles from Saint John.
How much longer is the road route than the straight-line distance?
The direct path is about 6.1 miles (9.8 km), while the road route adds roughly 3.7 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 7:56 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $1.32 one way or $2.64 round trip. Estimated CO2 is about 3.1 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers around Castle Point and Showers And Thunderstorms Likely near Saint John.
Stop Ideas Near Berkeley
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 Berkeley.
Gateway Transportation Center
Kirkwood
Alton
Washington
Flight Path Map
This map shows the direct air route between Castle Point and Saint John. Straight-line distance: 6.07 mi (9.77 km).
#1 Castle Point
A census-designated place in Jefferson County, Missouri.
| Population | 90,070 |
| Coordinates | 38.7581100, -90.2481700 |
| Altitude | 152 |
| 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: 16 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 19m |
| 40 mph (64.37 km/h) | 00h 14m |
| 50 mph (80.47 km/h) | 00h 11m |
| 60 mph (96.56 km/h) | 00h 09m |
| 70 mph (112.65 km/h) | 00h 08m |
| 80 mph (129 km/h) | 00h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $1.32 | $2.64 |
| Mid-grade | $4.25 | $1.49 | $2.98 |
| Premium | $4.65 | $1.63 | $3.26 |
| Diesel | $5.30 | $1.86 | $3.71 |
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.