How far is Barnhart, MO from St. Louis, MO?
The driving distance from Barnhart, MO to St. Louis, MO is about 25.2 miles (40.6 km), with a travel time of about 00h 29m by car.
- The straight-line flight distance is about 22.2 miles (35.8 km).
- For a round trip, plan for roughly 00h 58m 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 29m.
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.
Census designated place
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Barnhart and St. Louis.
Turn-by-Turn Driving Directions
Step-by-step road directions between Barnhart and St. Louis.
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1
Start on East Street
96 m · 16 sec · East Street
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2
Turn right onto Willing Street
40 m · 11 sec · Willing Street
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3
Turn left onto East Street
792 ft · 37 sec · East Street
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4
Turn left
1096 ft · 31 sec
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5
Turn left
2994 ft · 1 min
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6
Take the ramp slight right toward I 55 North: Saint Louis
1455 ft · 18 sec
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7
Merge slight left
9.6 mi · 11 min
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8
Continue on Rosa Parks Highway
12.5 mi · 16 min · Rosa Parks Highway
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9
Take the exit slight right toward MO 30 East: Gravois Avenue
1001 ft · 24 sec
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10
Turn slight right onto Gravois Avenue
1044 ft · 27 sec · Gravois Avenue
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11
Continue on South Tucker Boulevard
1.3 mi · 3 min · South Tucker Boulevard
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12
Turn right onto Market Street
26 m · 2 sec · Market Street
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13
Arrive at your destination
0 m · 1 sec · Market Street
Car Route Details
A richer read on the saved driving route between Barnhart and St. 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.
Rosa Parks Highway
Continue on Rosa Parks Highway
12.5 mi · 00h 16m
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.
Chance Rain Showers leaving Barnhart and Chance Showers And Thunderstorms near St. Louis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Barnhart to St. Louis?
The road trip is about 25.2 miles (40.6 km) and usually takes 00h 29m 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?
Mehlville is a useful midpoint, sitting about 12.6 miles from Barnhart and 12.7 miles from St. Louis.
How much longer is the road route than the straight-line distance?
The direct path is about 22.2 miles (35.8 km), while the road route adds roughly 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 CDT. If you want a more comfortable same-day return, try to leave by 7:32 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.36 one way or $6.71 round trip. Estimated CO2 is about 7.9 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain Showers around Barnhart and Chance Showers And Thunderstorms near St. Louis.
Stop Ideas Near Mehlville
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 Mehlville.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Barnhart and St. Louis. Straight-line distance: 22.23 mi (35.78 km).
#1 Barnhart
Census designated place
| Population | 5,682 |
| Coordinates | 38.3442200, -90.3934500 |
| Altitude | 132 |
| 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: 41 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 50m |
| 40 mph (64.37 km/h) | 00h 37m |
| 50 mph (80.47 km/h) | 00h 30m |
| 60 mph (96.56 km/h) | 00h 25m |
| 70 mph (112.65 km/h) | 00h 21m |
| 80 mph (129 km/h) | 00h 18m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $3.36 | $6.71 |
| Mid-grade | $4.25 | $3.79 | $7.57 |
| Premium | $4.65 | $4.14 | $8.28 |
| Diesel | $5.30 | $4.72 | $9.44 |
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 · May 24, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.