How far is Lake Saint Louis, MO from St. Louis, MO?
The driving distance from Lake Saint Louis, MO to St. Louis, MO is about 40 miles (64.3 km), with a travel time of about 00h 42m by car.
- The straight-line flight distance is about 33.8 miles (54.4 km).
- For a round trip, plan for roughly 01h 24m 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 42m.
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.
A city in St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Lake Saint Louis and St. Louis.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lake Saint Louis and St. Louis.
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1
Start on Savoy Drive
2237 ft · 1 min · Savoy Drive
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2
Turn right onto De Loire Drive
1483 ft · 53 sec · De Loire Drive
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3
At the end of the road, turn right onto Veterans Memorial Parkway
1.2 mi · 2 min · Veterans Memorial Parkway
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4
Enter the roundabout and take exit 3 toward I 70 East
81 m · 6 sec
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5
Exit the roundabout onto I 70 East
918 ft · 13 sec
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6
Merge slight left
26.3 mi · 33 min
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7
Take the exit slight right toward Bermuda Road
1578 ft · 24 sec
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8
Keep slight left to continue on I 70 East: Saint Louis
810 ft · 13 sec
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9
Merge slight left
6.8 mi · 9 min
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10
Continue on Andy Gammon Memorial Highway
1.5 mi · 2 min · Andy Gammon Memorial Highway
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11
Keep slight right to continue on Andy Gammon Memorial Highway
81 m · 7 sec · Andy Gammon Memorial Highway
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12
Take the exit slight right toward Tucker Boulevard, Downtown Saint Louis
1485 ft · 38 sec
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13
Continue on North Tucker Boulevard
1.1 mi · 3 min · North Tucker Boulevard
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14
Continue on South Tucker Boulevard
121 m · 22 sec · South Tucker Boulevard
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15
Turn right onto Market Street
26 m · 2 sec · Market Street
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16
Arrive at your destination
0 m · 1 sec · Market Street
Car Route Details
A richer read on the saved driving route between Lake Saint Louis and St. Louis.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 70 East
Merge slight left
26.3 mi · 00h 33m
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 Lake Saint Louis and Sunny near St. Louis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lake Saint Louis to St. Louis?
The road trip is about 40 miles (64.3 km) and usually takes 00h 42m 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?
Saint Charles is a useful midpoint, sitting about 19.4 miles from Lake Saint Louis and 20.6 miles from St. 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 6.2 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 7:06 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.32 one way or $10.63 round trip. Estimated CO2 is about 12.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Lake Saint Louis and Sunny near St. Louis.
Stop Ideas Near Saint Charles
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 Saint Charles.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Lake Saint Louis and St. Louis. Straight-line distance: 33.8 mi (54.4 km).
#1 Lake Saint Louis
City in Saint Charles County, Missouri, United States
| Population | 17,186 |
| Coordinates | 38.7975500, -90.7856800 |
| Altitude | 172 |
| Country | United States |
#2 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 |
End: Market Street (-90.197859, 38.627348)
Estimated Travel Time
Distance: 64 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 19m |
| 40 mph (64.37 km/h) | 00h 59m |
| 50 mph (80.47 km/h) | 00h 47m |
| 60 mph (96.56 km/h) | 00h 39m |
| 70 mph (112.65 km/h) | 00h 34m |
| 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 | $5.32 | $10.63 |
| Mid-grade | $4.25 | $6.00 | $11.99 |
| Premium | $4.65 | $6.56 | $13.12 |
| Diesel | $5.30 | $7.48 | $14.96 |
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.