How far is Knoxville, TN from Union, TN?
The driving distance from Knoxville, TN to Union, TN is about 95.6 miles (153.9 km), with a travel time of about 01h 56m by car.
- The straight-line flight distance is about 82.4 miles (132.6 km).
- For a round trip, plan for roughly 03h 52m 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 56m.
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 McMinn County, Tennessee, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny then Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Knoxville and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Knoxville and Union.
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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
59.9 mi · 1 hr 4 min
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8
Take the exit slight right toward SR 60: Cleveland, Dayton
947 ft · 27 sec
-
9
Turn right onto Georgetown Road Northwest
962 ft · 20 sec · Georgetown Road Northwest
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10
Continue on 25th Street Northwest
554 ft · 12 sec · 25th Street Northwest
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11
Continue on 25th Street NW
3052 ft · 60 sec · 25th Street NW
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12
Continue on 25th Street Northwest
3.4 mi · 5 min · 25th Street Northwest
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13
Continue on Appalachian Highway
1.2 mi · 2 min · Appalachian Highway
-
14
Take the exit slight right
812 ft · 22 sec
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15
Keep slight left
30 m · 8 sec
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16
Turn left onto Spring Place Road Southeast
8.4 mi · 15 min · Spring Place Road Southeast
-
17
Turn slight right onto Hughes Lake Road Southeast
1.3 mi · 3 min · Hughes Lake Road Southeast
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18
Arrive at your destination
0 m · 1 sec · Hughes Lake Road Southeast
Car Route Details
A richer read on the saved driving route between Knoxville and Union.
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
59.9 mi · 01h 04m
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.
Sunny then Chance Rain Showers leaving Knoxville and Sunny near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Knoxville to Union?
The road trip is about 95.6 miles (153.9 km) and usually takes 01h 56m 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?
Niota is a useful midpoint, sitting about 47.8 miles from Knoxville and 47.8 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 82.4 miles (132.6 km), while the road route adds roughly 13.2 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 2:38 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $13.16 one way or $26.31 round trip. Estimated CO2 is about 29.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny then Chance Rain Showers around Knoxville and Sunny near Union.
Flight Path Map
This map shows the direct air route between Knoxville and Union. Straight-line distance: 82.38 mi (132.58 km).
#1 Knoxville
The most populous city in Tennessee.
| Population | 190,223 |
| Coordinates | 35.9606400, -83.9207400 |
| Altitude | 276 |
| Country | United States |
#2 Union
Union is a place in Tennessee, United States.
| Population | 0 |
| Coordinates | 35.0139600, -84.8110500 |
| Altitude | 243 |
| Country | United States |
End: Union (-84.81105, 35.01396)
Estimated Travel Time
Distance: 154 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 11m |
| 40 mph (64.37 km/h) | 02h 23m |
| 50 mph (80.47 km/h) | 01h 54m |
| 60 mph (96.56 km/h) | 01h 35m |
| 70 mph (112.65 km/h) | 01h 21m |
| 80 mph (129 km/h) | 01h 11m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.90 | $13.16 | $26.31 |
| Mid-grade | $4.37 | $14.71 | $29.42 |
| Premium | $4.77 | $16.09 | $32.18 |
| Diesel | $6.00 | $20.23 | $40.45 |
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 · Oct 15, 2026