How far is St. Louis, MO from Lake Saint Louis, MO?
The driving distance from St. Louis, MO to Lake Saint Louis, MO is about 39.3 miles (63.2 km), with a travel time of about 00h 54m by car.
- The straight-line flight distance is about 33.8 miles (54.4 km).
- For a round trip, plan for roughly 01h 48m 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 54m.
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.
A city in St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Cloudy
Sunny
Driving Route Map
The map below follows the saved road route between St. Louis and Lake Saint Louis.
Turn-by-Turn Driving Directions
Step-by-step road directions between St. Louis and Lake Saint Louis.
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1
Start on Market Street
1.6 mi · 3 min · Market Street
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2
Take the ramp slight left toward I 64 West, US 40 West: Wentzville
1531 ft · 24 sec
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3
Merge slight left onto Jack Buck Memorial Highway
4.3 mi · 6 min · Jack Buck Memorial Highway
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4
Continue on Daniel Boone Expressway
5.7 mi · 7 min · Daniel Boone Expressway
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5
Continue on Avenue of the Saints
24.6 mi · 30 min · Avenue of the Saints
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6
Take the exit slight right toward Lake Saint Louis Boulevard
1764 ft · 50 sec
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7
Keep slight left to continue on Civic Center Drive
1.4 km · 2 min · Civic Center Drive
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8
Turn right onto Dauphine Drive
1.3 mi · 4 min · Dauphine Drive
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9
At the end of the road, turn right onto Rue Grand Drive
1292 ft · 45 sec · Rue Grand Drive
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10
Turn right onto Savoy Drive
71 m · 10 sec · Savoy Drive
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11
Arrive at your destination
0 m · 1 sec · Savoy Drive
Car Route Details
A richer read on the saved driving route between St. Louis and Lake Saint Louis.
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
Continue on Avenue of the Saints
24.6 mi · 00h 30m
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.
Partly Cloudy leaving St. Louis and Sunny near Lake Saint Louis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from St. Louis to Lake Saint Louis?
The road trip is about 39.3 miles (63.2 km) and usually takes 00h 54m 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?
Chesterfield is a useful midpoint, sitting about 19.6 miles from St. Louis and 19.7 miles from Lake Saint Louis.
How much longer is the road route than the straight-line distance?
The direct path is about 33.8 miles (54.4 km), while the road route adds roughly 5.5 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 4:42 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.24 one way or $10.48 round trip. Estimated CO2 is about 12.4 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around St. Louis and Sunny near Lake Saint Louis.
Stop Ideas Near Chesterfield
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Park
Wildwood City Hall
Ferguson Finance Director
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Chesterfield.
Kirkwood
Gateway Transportation Center
Washington
Alton
Flight Path Map
This map shows the direct air route between St. Louis and Lake Saint Louis. Straight-line distance: 33.8 mi (54.4 km).
#1 St. Louis
The second most populous city in Missouri and the center of the St.
| Population | 315,685 |
| Coordinates | 38.6272700, -90.1978900 |
| Altitude | 142 |
| Country | United States |
#2 Lake Saint Louis
City in Saint Charles County, Missouri, United States
| Population | 17,186 |
| Coordinates | 38.7975500, -90.7856800 |
| Altitude | 172 |
| Country | United States |
End: Lake Saint Louis (-90.78568, 38.79755)
Estimated Travel Time
Distance: 63 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 18m |
| 40 mph (64.37 km/h) | 00h 58m |
| 50 mph (80.47 km/h) | 00h 47m |
| 60 mph (96.56 km/h) | 00h 39m |
| 70 mph (112.65 km/h) | 00h 33m |
| 80 mph (129 km/h) | 00h 29m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $5.24 | $10.48 |
| Mid-grade | $4.25 | $5.91 | $11.82 |
| Premium | $4.65 | $6.47 | $12.94 |
| Diesel | $5.30 | $7.37 | $14.75 |
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 20, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.