How far is Oak Ridge, TN from Chattanooga, TN?
The driving distance from Oak Ridge, TN to Chattanooga, TN is about 107.7 miles (173.4 km), with a travel time of about 01h 42m by car.
- The straight-line flight distance is about 88.7 miles (142.7 km).
- For a round trip, plan for roughly 03h 25m 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 42m.
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 Rhea County, Tennessee, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Oak Ridge and Chattanooga.
Turn-by-Turn Driving Directions
Step-by-step road directions between Oak Ridge and Chattanooga.
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1
Start on North Illinois Avenue
1 mi · 1 min · North Illinois Avenue
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2
Continue on East Tri County Boulevard
5.7 mi · 7 min · East Tri County Boulevard
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3
Continue on Harriman Highway
9.6 mi · 11 min · Harriman Highway
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4
Merge slight right onto Bitter Creek Highway
835 ft · 11 sec · Bitter Creek Highway
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5
Continue on Harriman Highway
1233 ft · 16 sec · Harriman Highway
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6
Continue on Hannah Highway
2.1 mi · 2 min · Hannah Highway
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7
Continue on North Roane Street
6.4 mi · 8 min · North Roane Street
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8
Continue on North Gateway Avenue
6.2 mi · 7 min · North Gateway Avenue
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9
Continue on Spring City Highway
4.4 mi · 5 min · Spring City Highway
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10
Continue on Rhea County Highway
31.9 mi · 40 min · Rhea County Highway
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11
Continue on Dayton Pike
31.5 mi · 37 min · Dayton Pike
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12
Take the exit slight right toward Downtown
1176 ft · 40 sec
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13
Turn straight onto West Martin Luther King Boulevard
1541 ft · 45 sec · West Martin Luther King Boulevard
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14
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 Oak Ridge 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.
Rhea County Highway
Continue on Rhea County Highway
31.9 mi · 00h 40m
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.
Mostly Sunny leaving Oak Ridge and Partly Cloudy near Chattanooga.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Oak Ridge to Chattanooga?
The road trip is about 107.7 miles (173.4 km) and usually takes 01h 42m 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?
Spring City is a useful midpoint, sitting about 49.8 miles from Oak Ridge and 58 miles from Chattanooga.
How much longer is the road route than the straight-line distance?
The direct path is about 88.7 miles (142.7 km), while the road route adds roughly 19 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 3:04 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.33 one way or $28.66 round trip. Estimated CO2 is about 33.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Oak Ridge and Partly Cloudy near Chattanooga.
Flight Path Map
This map shows the direct air route between Oak Ridge and Chattanooga. Straight-line distance: 88.68 mi (142.71 km).
#1 Oak Ridge
City in Tennessee, United States
| Population | 29,340 |
| Coordinates | 36.0103600, -84.2696400 |
| Altitude | 259 |
| 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: 173 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 35m |
| 40 mph (64.37 km/h) | 02h 41m |
| 50 mph (80.47 km/h) | 02h 09m |
| 60 mph (96.56 km/h) | 01h 47m |
| 70 mph (112.65 km/h) | 01h 32m |
| 80 mph (129 km/h) | 01h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $14.33 | $28.66 |
| Mid-grade | $4.25 | $16.16 | $32.32 |
| Premium | $4.65 | $17.69 | $35.37 |
| Diesel | $5.30 | $20.16 | $40.31 |
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 · Apr 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.