How far is Saint Peters, MO from Marlborough, MO?
The driving distance from Saint Peters, MO to Marlborough, MO is about 32.6 miles (52.4 km), with a travel time of about 00h 45m by car.
- The straight-line flight distance is about 22.3 miles (35.9 km).
- For a round trip, plan for roughly 01h 30m 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 45m.
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.
Mostly Sunny
Patchy Drizzle
Driving Route Map
The map below follows the saved road route between Saint Peters and Marlborough.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Peters and Marlborough.
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1
Start on the route
1.2 mi · 1 min
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2
Take the exit slight right toward MO 79: Elsberry, Louisiana
725 ft · 15 sec
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3
Keep slight left to continue on MO 79
117 m · 15 sec
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4
Turn left
652 ft · 11 sec
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5
Take the ramp slight right toward I 70 East
1294 ft · 19 sec
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6
Merge slight left
18.1 mi · 23 min
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7
Take the exit slight right toward I 170 South: Clayton
1906 ft · 41 sec
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8
Merge slight left onto Inner Belt Expressway
7.1 mi · 9 min · Inner Belt Expressway
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9
Take the exit slight right toward Brentwood Boulevard North, Eager Road
1010 ft · 22 sec
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10
Keep slight left to continue on Eager Road
156 m · 11 sec
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11
Continue on Eager Road
566 ft · 14 sec
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12
Turn left onto Eager Road
1895 ft · 49 sec · Eager Road
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13
Turn slight right
156 m · 19 sec
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14
Keep slight left
42 m · 5 sec
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15
Turn right onto South Hanley Road
1.6 mi · 4 min · South Hanley Road
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16
Continue on Laclede Station Road
2.5 mi · 4 min · Laclede Station Road
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17
Turn left onto Wimbledon Drive
868 ft · 41 sec · Wimbledon Drive
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18
Turn right onto Watson Road
46 m · 3 sec · Watson Road
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19
Arrive at your destination
0 m · 1 sec · Watson Road
Car Route Details
A richer read on the saved driving route between Saint Peters and Marlborough.
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 East
Merge slight left
18.1 mi · 00h 23m
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 Sunny leaving Saint Peters and Patchy Drizzle near Marlborough.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint Peters to Marlborough?
The road trip is about 32.6 miles (52.4 km) and usually takes 00h 45m 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 Ann is a useful midpoint, sitting about 16.3 miles from Saint Peters and 16.3 miles from Marlborough.
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 10.3 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 7:00 PM CST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.34 one way or $8.68 round trip. Estimated CO2 is about 10.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Saint Peters and Patchy Drizzle near Marlborough.
Stop Ideas Near Saint Ann
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 Ann.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Saint Peters and Marlborough. Straight-line distance: 22.28 mi (35.85 km).
#1 Saint Peters
The most populous city in St.
| Population | 58,043 |
| Coordinates | 38.8003300, -90.6265100 |
| Altitude | 134 |
| Country | United States |
#2 Marlborough
Marlborough is a place in Missouri, United States.
| Population | 0 |
| Coordinates | 38.5703300, -90.3370600 |
| Altitude | 164 |
| Country | United States |
End: Marlborough (-90.33706, 38.57033)
Estimated Travel Time
Distance: 52 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 05m |
| 40 mph (64.37 km/h) | 00h 48m |
| 50 mph (80.47 km/h) | 00h 39m |
| 60 mph (96.56 km/h) | 00h 32m |
| 70 mph (112.65 km/h) | 00h 27m |
| 80 mph (129 km/h) | 00h 24m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $4.34 | $8.68 |
| Mid-grade | $4.15 | $4.77 | $9.54 |
| Premium | $4.51 | $5.19 | $10.38 |
| Diesel | $6.00 | $6.90 | $13.79 |
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 · Nov 06, 2026