How far is Decatur, TN from Chattanooga, TN?
The driving distance from Decatur, TN to Chattanooga, TN is about 52.4 miles (84.4 km), with a travel time of about 00h 58m by car.
- The straight-line flight distance is about 43.7 miles (70.3 km).
- For a round trip, plan for roughly 01h 56m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 58m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Town in Rhea County, Tennessee, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Decatur and Chattanooga.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Chattanooga.
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1
Start on Highway 58
830 ft · 19 sec · Highway 58
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2
Turn right onto Decatur Pike
2408 ft · 41 sec · Decatur Pike
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3
Continue on William Jennings Bryan Highway
5.7 mi · 8 min · William Jennings Bryan Highway
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4
Continue on Old Washington Highway
8 mi · 12 min · Old Washington Highway
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5
Continue on Washington Street
143 m · 11 sec · Washington Street
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6
Turn left
37.5 mi · 44 min
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7
Take the exit slight right toward Downtown
1176 ft · 40 sec
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8
Turn straight onto West Martin Luther King Boulevard
1541 ft · 45 sec · West Martin Luther King Boulevard
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9
Arrive at your destination
0 m · 1 sec · West Martin Luther King Boulevard
Car Route Details
A richer read on the saved driving route between Decatur and Chattanooga.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Longest stretch
Turn left
37.5 mi · 00h 44m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Showers And Thunderstorms Likely leaving Decatur and Showers And Thunderstorms Likely near Chattanooga.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Chattanooga?
The road trip is about 52.4 miles (84.4 km) and usually takes 00h 58m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Graysville is a useful midpoint, sitting about 26.2 miles from Decatur and 26.3 miles from Chattanooga.
How much longer is the road route than the straight-line distance?
The direct path is about 43.7 miles (70.3 km), while the road route adds roughly 8.7 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:34 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.98 one way or $13.95 round trip. Estimated CO2 is about 16.4 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around Decatur and Showers And Thunderstorms Likely near Chattanooga.
Flight Path Map
This map shows the direct air route between Decatur and Chattanooga. Straight-line distance: 43.69 mi (70.32 km).
#1 Decatur
Human settlement in Meigs County, Tennessee, United States of America
| Population | 1,663 |
| Coordinates | 35.5147900, -84.7902200 |
| Altitude | 237 |
| Country | United States |
#2 Chattanooga
The fourth most populous city in Tennessee.
| Population | 184,742 |
| Coordinates | 35.0456300, -85.3096800 |
| Altitude | 206 |
| Country | United States |
End: West Martin Luther King Boulevard (-85.309688, 35.045753)
Estimated Travel Time
Distance: 84 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 44m |
| 40 mph (64.37 km/h) | 01h 18m |
| 50 mph (80.47 km/h) | 01h 02m |
| 60 mph (96.56 km/h) | 00h 52m |
| 70 mph (112.65 km/h) | 00h 44m |
| 80 mph (129 km/h) | 00h 39m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $6.98 | $13.95 |
| Mid-grade | $4.25 | $7.87 | $15.74 |
| Premium | $4.65 | $8.61 | $17.22 |
| Diesel | $5.30 | $9.81 | $19.62 |
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 Tennessee · May 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.