How far is Marlborough, MO from Saint Peters, MO?
The driving distance from Marlborough, MO to Saint Peters, MO is about 30.3 miles (48.8 km), with a travel time of about 00h 34m by car.
- The straight-line flight distance is about 22.3 miles (35.9 km).
- For a round trip, plan for roughly 01h 09m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CST.
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 34m.
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 Saint Louis County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Patchy Drizzle
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Marlborough and Saint Peters.
Turn-by-Turn Driving Directions
Step-by-step road directions between Marlborough and Saint Peters.
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1
Start on Watson Road
975 ft · 21 sec · Watson Road
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2
Turn sharp right onto Laclede Station Road
2.7 mi · 5 min · Laclede Station Road
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3
Continue on South Hanley Road
1.6 mi · 4 min · South Hanley Road
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4
Turn slight right onto Eager Road
3052 ft · 1 min · Eager Road
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5
Take the ramp slight right toward I 170 North
2323 ft · 33 sec
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6
Merge slight right onto Inner Belt Expressway
7.1 mi · 9 min · Inner Belt Expressway
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7
Take the exit slight left toward I 70 West: Kansas City
2159 ft · 37 sec
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8
Merge slight right
16.8 mi · 21 min
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9
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Marlborough and Saint Peters.
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 70 West
Merge slight right
16.8 mi · 00h 21m
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.
Patchy Drizzle leaving Marlborough and Mostly Sunny near Saint Peters.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Marlborough to Saint Peters?
The road trip is about 30.3 miles (48.8 km) and usually takes 00h 34m 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?
Edmundson is a useful midpoint, sitting about 14.9 miles from Marlborough and 15.5 miles from Saint Peters.
How much longer is the road route than the straight-line distance?
The direct path is about 22.3 miles (35.9 km), while the road route adds roughly 8 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 CST. If you want a more comfortable same-day return, try to leave by 7:20 PM CST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.04 one way or $8.08 round trip. Estimated CO2 is about 9.5 kg one way.
What should you check before leaving?
Before you leave, expect Patchy Drizzle around Marlborough and Mostly Sunny near Saint Peters.
Stop Ideas Near Edmundson
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 Edmundson.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Marlborough and Saint Peters. Straight-line distance: 22.28 mi (35.85 km).
#1 Marlborough
Marlborough is a place in Missouri, United States.
| Population | 0 |
| Coordinates | 38.5703300, -90.3370600 |
| Altitude | 164 |
| Country | United States |
#2 Saint Peters
The most populous city in St.
| Population | 58,043 |
| Coordinates | 38.8003300, -90.6265100 |
| Altitude | 134 |
| Country | United States |
End: I 70 West (-90.626511, 38.800311)
Estimated Travel Time
Distance: 49 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 00m |
| 40 mph (64.37 km/h) | 00h 45m |
| 50 mph (80.47 km/h) | 00h 36m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 25m |
| 80 mph (129 km/h) | 00h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $4.04 | $8.08 |
| Mid-grade | $4.15 | $4.44 | $8.88 |
| Premium | $4.51 | $4.83 | $9.66 |
| Diesel | $6.00 | $6.42 | $12.83 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
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