How far is Knoxville, TN from Decatur, TN?
The driving distance from Knoxville, TN to Decatur, TN is about 65.6 miles (105.6 km), with a travel time of about 01h 17m by car.
- The straight-line flight distance is about 57.7 miles (92.8 km).
- For a round trip, plan for roughly 02h 35m 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 01h 17m.
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.
Human settlement in Loudon County, Tennessee, United States of America
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 Knoxville and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Knoxville and Decatur.
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1
Start on Henley Street
1056 ft · 20 sec · Henley Street
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2
Continue on Henley Street
727 ft · 14 sec · Henley Street
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3
Turn slight left onto Western Avenue
1.1 km · 1 min · Western Avenue
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4
Turn left onto Ailor Avenue
2326 ft · 43 sec · Ailor Avenue
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5
Take the ramp straight toward I 40 West, I 75 South
1637 ft · 40 sec
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6
Merge slight left
18.3 mi · 21 min
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7
Keep slight left to continue on I 75 South: Chattanooga
35.9 mi · 39 min
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8
Take the exit slight right toward Primary SR 30: Athens, Decatur
1455 ft · 25 sec
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9
Turn right onto Decatur Pike
8.9 mi · 13 min · Decatur Pike
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10
Turn right onto West Memorial Drive
2212 ft · 48 sec · West Memorial Drive
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11
Turn right onto Highway 58
20 m · 1 sec · Highway 58
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12
Arrive at your destination
0 m · 1 sec · Highway 58
Car Route Details
A richer read on the saved driving route between Knoxville and Decatur.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 75 South
Keep slight left to continue on I 75 South: Chattanooga
35.9 mi · 00h 39m
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 Knoxville and Showers And Thunderstorms Likely near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Knoxville to Decatur?
The road trip is about 65.6 miles (105.6 km) and usually takes 01h 17m 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?
Loudon is a useful midpoint, sitting about 32.8 miles from Knoxville and 32.8 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 57.7 miles (92.8 km), while the road route adds roughly 7.9 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 3:54 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $8.75 one way or $17.50 round trip. Estimated CO2 is about 20.6 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around Knoxville and Showers And Thunderstorms Likely near Decatur.
Flight Path Map
This map shows the direct air route between Knoxville and Decatur. Straight-line distance: 57.68 mi (92.82 km).
#1 Knoxville
The most populous city in Tennessee.
| Population | 190,223 |
| Coordinates | 35.9606400, -83.9207400 |
| Altitude | 276 |
| Country | United States |
#2 Decatur
Human settlement in Meigs County, Tennessee, United States of America
| Population | 1,663 |
| Coordinates | 35.5147900, -84.7902200 |
| Altitude | 237 |
| Country | United States |
End: Decatur (-84.79022, 35.51479)
Estimated Travel Time
Distance: 106 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 11m |
| 40 mph (64.37 km/h) | 01h 38m |
| 50 mph (80.47 km/h) | 01h 18m |
| 60 mph (96.56 km/h) | 01h 05m |
| 70 mph (112.65 km/h) | 00h 56m |
| 80 mph (129 km/h) | 00h 49m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $8.75 | $17.50 |
| Mid-grade | $4.25 | $9.87 | $19.73 |
| Premium | $4.65 | $10.80 | $21.59 |
| Diesel | $5.30 | $12.31 | $24.61 |
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.