How far is Union, TN from East Chattanooga, TN?

The driving distance from Union, TN to East Chattanooga, TN is about 39.1 miles (63 km), with a travel time of about 00h 46m by car.

  • The straight-line flight distance is about 25 miles (40.3 km).
  • For a round trip, plan for roughly 01h 32m of driving time before adding stops, traffic, or weather delays.
  • A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Trip Tools

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.

Reverse Route
Quick Snapshot
Road
39.16 mi
00h 46m
Flight
25.04 mi
40.29 km direct

This route works well as a day trip with time at the destination.

Learn Distance

Choose another destination from Union.

Flight Distance

Direct air line
25.04 mi
Kilometers
40.29 km
Flight Time
00h 03m

Driving Distance

Road route
39.16 mi
Kilometers
63.02 km
Drive Time
00h 46m

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 46m.

Arrival Snapshot
Arrive in East Chattanooga
Thu, Oct 15, 11:17 PM EDT
Return by in Union
Fri, Oct 16, 12:03 AM EDT
Useful when you're deciding between a quick errand, a day trip, or a longer stop.
Leave Union
2026-10-15T22:31
Arrive East Chattanooga
Thu, Oct 15, 11:17 PM EDT
Route Timing
00h 46m
One way by road
Best Departure Window
8:00 AM to 10:00 AM EDT
Aim for a morning departure
Arrive between
8:46 AM to 10:46 AM EDT

A morning start gives you useful time at the destination and keeps the return out of the late evening.

Leave by
4:58 PM EDT
Keeps a same-day return open with about 03h 00m at the destination.
Back in Union
9:30 PM EDT
Morning start is best

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.

Mid-route stop
Ooltewah
TN

Census-designated place in Hamilton County, Tennessee

From Union
18 mi
00h 23m
To East Chattanooga
21.2 mi
00h 23m

Route Weather Snapshot

Check the forecast at both ends before you head out.

Origin
84°F
This Afternoon

Sunny

Starts
Thu, Oct 15 4:00 PM EDT
Wind
5 mph W
Destination
88°F
This Afternoon

Sunny

Starts
Thu, Oct 15 3:00 PM EDT
Wind
5 mph SW

Driving Route Map

The map below follows the saved road route between Union and East Chattanooga.

Turn-by-Turn Driving Directions

Step-by-step road directions between Union and East Chattanooga.

  1. 1

    Start on Hughes Lake Road Southeast

    1.3 mi · 3 min · Hughes Lake Road Southeast

  2. 2

    Turn slight left onto Spring Place Road Southeast

    8.4 mi · 15 min · Spring Place Road Southeast

  3. 3

    Take the ramp slight right

    900 ft · 25 sec

  4. 4

    Merge slight left onto Appalachian Highway

    5.4 mi · 7 min · Appalachian Highway

  5. 5

    Take the exit left

    1530 ft · 37 sec

  6. 6

    Merge slight left

    12.4 mi · 14 min

  7. 7

    Take the exit slight right toward Secondary SR 317 West, US 11 South, US 64 West: Bonny Oaks Drive, Old Lee Highway

    1293 ft · 44 sec

  8. 8

    Keep slight right

    1115 ft · 25 sec

  9. 9

    Continue on Bonny Oaks Drive

    4.8 mi · 9 min · Bonny Oaks Drive

  10. 10

    Continue on Bonny Oaks Drive

    1.8 mi · 3 min · Bonny Oaks Drive

  11. 11

    Continue on Campbell Street

    1 km · 1 min · Campbell Street

  12. 12

    Turn right onto Glass Street

    1824 ft · 39 sec · Glass Street

  13. 13

    Turn left onto North Chamberlain Avenue

    16 m · 1 sec · North Chamberlain Avenue

  14. 14

    Arrive at your destination

    0 m · 1 sec · North Chamberlain Avenue

Car Route Details

A richer read on the saved driving route between Union and East Chattanooga.

OSRM road route
Drive Character

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.

Directions
14 steps
3 turns on the saved route
Ramps & Exits
5
2 merges, 3 ramps or exits
Navigation Density
35.7 / 100 mi
Decision points by distance
Main Roads
Appalachian Highway
18.1 mi · 46%
Spring Place Road Southeast
8.56 mi · 22%
Bonny Oaks Drive
6.54 mi · 17%
Hughes Lake Road Southeast
1.34 mi · 3%
Campbell Street
0.63 mi · 2%
Secondary SR 317 West
0.46 mi · 1%
Longest Stretch

Appalachian Highway

Merge slight left

12.4 mi · 00h 14m

Route Summary

A quick read on whether this route feels easy, ambitious, or worth planning around.

Trip Read

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.

Drive Time
00h 46m
Day trip friendly
Same-Day Return
01h 32m
Round-trip wheel time
Road vs Air
+14.1 mi
25 mi direct line
Halfway Stop
Ooltewah
00h 23m from Union
Leave By
4:58 PM EDT
Morning start is best
Weather Watch

Sunny leaving Union and Sunny near East Chattanooga.

Trip Questions

Direct answers travelers usually want before committing to the drive.

How long does it take to drive from Union to East Chattanooga?

The road trip is about 39.1 miles (63 km) and usually takes 00h 46m 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?

Ooltewah is a useful midpoint, sitting about 18 miles from Union and 21.2 miles from East Chattanooga.

How much longer is the road route than the straight-line distance?

The direct path is about 25 miles (40.3 km), while the road route adds roughly 14.1 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 4:58 PM EDT.

How much will gas cost for this route?

Using about 28.3 MPG, regular gas is estimated at $5.39 one way or $10.78 round trip. Estimated CO2 is about 12.3 kg one way.

What should you check before leaving?

Before you leave, expect Sunny around Union and Sunny near East Chattanooga.

Flight Path Map

This map shows the direct air route between Union and East Chattanooga. Straight-line distance: 25.04 mi (40.29 km).

Photo coming soon

#1 Union

Union is a place in Tennessee, United States.

Population0
Coordinates35.0139600, -84.8110500
Altitude243
CountryUnited States
Photo coming soon

#2 East Chattanooga

A neighborhood in Chattanooga, Tennessee.

Population11,000
Coordinates35.0653500, -85.2491200
Altitude208
CountryUnited States
Start: Hughes Lake Road Southeast (-84.81114, 35.014001)
End: North Chamberlain Avenue (-85.249066, 35.06533)

Estimated Travel Time

Distance: 63 km by road

SpeedTime
30 mph (48.3 km/h)01h 18m
40 mph (64.37 km/h)00h 58m
50 mph (80.47 km/h)00h 46m
60 mph (96.56 km/h)00h 39m
70 mph (112.65 km/h)00h 33m
80 mph (129 km/h)00h 29m

Fuel, Round Trip and CO2

Estimated fuel cost and emissions for this route.

One-way fuel
1.38 gal
5.23 L · about $5.39
Round trip
$10.78
2.76 gal · 10.46 L
Estimated CO2
12.3 kg one way
Round trip: 24.5 kg / 54 lb CO2, using regular gasoline.
Fuel$/galOne wayRound trip
Regular gas $3.90 $5.39 $10.78
Mid-grade $4.37 $6.02 $12.05
Premium $4.77 $6.59 $13.18
Diesel $6.00 $8.28 $16.57

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

There is no time difference between Union and East Chattanooga. The current time is 22:31:25.

Distance to Other Cities

How did we calculate? Place names are translated into coordinates. The Haversine formula calculates straight-line distance; driving distance uses road network data.