How far is Decatur, GA from Marietta, GA?
The driving distance from Decatur, GA to Marietta, GA is about 25.4 miles (40.8 km), with a travel time of about 00h 39m by car.
- The straight-line flight distance is about 19 miles (30.6 km).
- For a round trip, plan for roughly 01h 18m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
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 39m.
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.
Census designated place in the U.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Marietta.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Marietta.
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1
Start on the route
88 m · 27 sec
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2
At the end of the road, turn left onto East Ponce de Leon Avenue
1.2 mi · 3 min · East Ponce de Leon Avenue
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3
Continue on Ponce de Leon Avenue Northeast
2.1 mi · 5 min · Ponce de Leon Avenue Northeast
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4
Turn left onto Moreland Avenue Northeast
1006 ft · 28 sec · Moreland Avenue Northeast
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5
Turn right onto North Avenue Northeast
2.3 mi · 5 min · North Avenue Northeast
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6
Turn left onto Spring Street Northwest
146 m · 11 sec · Spring Street Northwest
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7
Take the ramp slight right toward I 75 North, I 85 North
1261 ft · 31 sec
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8
Merge slight left onto Downtown Connector
1.2 mi · 2 min · Downtown Connector
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9
Keep slight right to continue on Horace E Tate Freeway
7.2 mi · 9 min · Horace E Tate Freeway
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10
Continue on Larry McDonald Memorial Highway
7 mi · 8 min · Larry McDonald Memorial Highway
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11
Take the exit slight right toward GA 120 Alternate: North Marietta Parkway
2101 ft · 31 sec
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12
Turn left onto North Marietta Parkway
1.8 mi · 4 min · North Marietta Parkway
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13
Turn left onto Church Street
2145 ft · 59 sec · Church Street
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14
Arrive at your destination
0 m · 1 sec · West Park Square
Car Route Details
A richer read on the saved driving route between Decatur and Marietta.
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.
Horace E Tate Freeway
Keep slight right to continue on Horace E Tate Freeway
7.23 mi · 00h 09m
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 Decatur and Mostly Sunny near Marietta.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Marietta?
The road trip is about 25.4 miles (40.8 km) and usually takes 00h 39m 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?
Vinings is a useful midpoint, sitting about 12.2 miles from Decatur and 13.2 miles from Marietta.
How much longer is the road route than the straight-line distance?
The direct path is about 19 miles (30.6 km), while the road route adds roughly 6.4 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 EDT. If you want a more comfortable same-day return, try to leave by 7:12 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.53 one way or $7.05 round trip. Estimated CO2 is about 7.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Decatur and Mostly Sunny near Marietta.
Stop Ideas Near Vinings
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Cafe 55
Atlanta City Hall
College Park Recycling Drop off Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Vinings.
Peachtree Station
Gainesville
Flight Path Map
This map shows the direct air route between Decatur and Marietta. Straight-line distance: 19.04 mi (30.64 km).
#1 Decatur
County seat of DeKalb County, Georgia, United States
| Population | 25,655 |
| Coordinates | 33.7748300, -84.2963100 |
| Altitude | 318 |
| Country | United States |
#2 Marietta
The most populous city in Cobb County, Georgia.
| Population | 60,786 |
| Coordinates | 33.9526000, -84.5499300 |
| Altitude | 344 |
| Country | United States |
End: West Park Square (-84.550173, 33.952601)
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 | $3.96 | $3.53 | $7.05 |
| Mid-grade | $4.43 | $3.94 | $7.88 |
| Premium | $4.78 | $4.25 | $8.50 |
| Diesel | $5.62 | $5.01 | $10.01 |
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 Georgia · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.