Spanning 417.5 miles across Tennessee, this cross-state journey connects Humboldt to Kingsport in approximately 7 hours and 42 minutes. Because the route is almost entirely highway-focused, you can realistically complete the trip in a single day if you are comfortable with a full day behind the wheel. You should budget about $63 for fuel to cover the distance, though it is wise to keep a little extra set aside for fluctuations in gas prices. While the trip remains within the Southeast region, you will traverse a significant portion of the state from west to east. Whether you choose to power through in one go or break it up, having a clear plan for your two planned stops will make the long haul much more manageable.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
208.7 miles from Humboldt, TN
A natural place for your longest stop of the day
, about 3h 50m into the drive
.
Main Roads
Road
Distance
Duration
I 40
337.5 mi
6h 7m
I 81
50.5 mi
54m
US 45W
11.2 mi
14m
South Wilcox Drive
4.1 mi
6m
Sullivan Gardens Drive
3.1 mi
3m
Downtown Loop
2.9 mi
4m
East Main Street
2.6 mi
4m
TN 93
2.4 mi
2m
Longest stretch:
I 40
— 337.5 mi, about 6h 7m
Turn-by-Turn Driving Directions
Step-by-step road directions between Humboldt, TN and Kingsport, TN.
1
Start on US 70A; US 79; US 45W Business
1.8 mi·2 min·East Main Street
2
Turn right onto US 45W
11 mi·14 min·US 45W
Use the left lane.
3
Take the exit
0.3 mi·38 sec
Use the left lane.
4
Merge onto I 40; US 412
127 mi·2 hr 16 min·I 40; US 412
Use the straight lane.
5
Keep slight right at fork
0.2 mi·24 sec
Exit 208AToward I 40 East, I 65 South: Knoxville, HuntsvilleUse the slight left / slight right lanes.
6
Merge onto I 40; I 65
2.4 mi·3 min·Downtown Loop
Use the straight / slight right lanes.
7
Continue on I 40
0.5 mi·42 sec·Downtown Loop
Exit 211B; 211AToward I 24 West, I 40 East, I 24 East: Clarksville, Louisville, Knoxville, ChattanoogaUse the straight / slight right lanes.
8
Keep slight right at fork onto I 40
174 mi·3 hr 9 min·I 40
Exit 211AToward I 40 East, I 24 East: Knoxville, ChattanoogaUse the slight left / slight right lanes.
9
Keep slight left at fork onto I 40
37 mi·40 min·I 40
Use the straight / slight right lanes.
10
Keep slight left at fork onto I 81
51 mi·54 min·I 81
Exit 421Toward I 81 North: Bristol
11
Take the exit
0.2 mi·32 sec
Exit 50Toward SR 93: Jonesborough, Fall Branch
12
Keep slight right at fork
509 ft·14 sec
Exit 50Toward SR 93: Jonesborough, Fall Branch
13
Merge onto SR 93
0.6 mi·38 sec·SR 93
14
Continue on TN 93
2.4 mi·2 min·TN 93
15
Continue on SR 93
3.1 mi·3 min·Sullivan Gardens Drive
16
Continue on SR 93
1.5 mi·1 min·South Wilcox Drive
17
Continue on SR 93
1.4 mi·1 min·Sullivan Gardens Parkway
18
Turn left onto SR 126
2.6 mi·4 min·South Wilcox Drive
Use the straight lane.
19
Turn left onto East Sullivan Street
0.2 mi·24 sec·East Sullivan Street
20
Turn slight left onto East Main Street
0.7 mi·1 min·East Main Street
21
Turn right onto Broad Street
0.1 mi·15 sec·Broad Street
22
Enter roundabout onto Broad Street
46 ft·1 sec·Broad Street
23
Continue on Broad Street
433 ft·19 sec·Broad Street
24
Turn left onto TN 36
0.1 mi·23 sec·West Center Street
25
Arrive at destination
TN 36
Trip Plan
To tackle this 417.5-mile trek effectively, aim to depart early in the morning to beat potential congestion near the larger cities along I-40. Since you have two stops planned, try to space them out evenly to keep your energy levels steady throughout the nearly eight-hour duration. Keep a close eye on your fuel gauge during the long 337.5-mile stretch on I-40, as you will want to avoid stopping in high-traffic areas if possible. Because this is a highway-focused drive, maintain a consistent pace and utilize cruise control where safe to manage your fuel efficiency effectively. Since you are staying on major interstates for nearly the entire trip, you have the flexibility to adjust your stops based on real-time traffic updates.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 208.7 miles from Humboldt, TN, or about 3h 50m into the drive.
The longest continuous stretch on this route runs about 337.5 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 92 miles or 1h 42m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 208.7 miles or 3h 50m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 33m
Traffic, exits, and arrival timing usually matter more near Kingsport, TN than in the middle of the route.
Before You Leave
+
Open the route before leaving Humboldt, TN so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Humboldt, TN
This is one driving day of about 417.5 miles and 7h 42m.
Your first comfortable stop window is around 92 miles from Humboldt, TN.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 40 for about 337.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 17
5 decision points cluster between mile 1.8 and 404.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
1.8 mi into trip|~2m in|US 45W
Turn right onto US 45W
Lane positioning matters here
Use the left lane.
9
140.2 mi into trip|~2h 34m in
Keep slight right at fork toward I 40 East, I 65 South: Knoxville, Huntsville
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Exit 208A
Toward I 40 East, I 65 South: Knoxville, Huntsv...
9
143.4 mi into trip|~2h 39m in|I 40
Keep slight right at fork onto I 40 toward I 40 East, I 24 East: Knoxville, Chattanooga
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Exit 211A
Toward I 40 East, I 24 East: Knoxville, Chattan...
6
317.2 mi into trip|~5h 48m in|I 40
Keep slight left at fork onto I 40
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
8
404.7 mi into trip|~7h 24m in
Keep slight right at fork toward SR 93: Jonesborough, Fall Branch
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Exit 50
Toward SR 93: Jonesborough, Fall Branch
Fuel & Cost
Regular Gas
$65.27 one way
$130.54 round trip
$3.97/gal25.4 MPG avg146 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$71.67
$143.33
premium
$4.89
$80.34
$160.69
diesel
$5.61
$92.18
$184.36
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$65
Meals
$25–$50
Total
$90–$115
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 146.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $44 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
125.3
1
$43.84
$20.04
Efficient EV
104.4
1
$36.53
$16.70
EV Truck/SUV
167
2
$58.45
$26.72
Gas CO2
146 kg
EV CO2
49 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Humboldt, TN
Evening
in Humboldt on Saturday
Local time
8:13 PM
CDT
Current temp
54°F
Unavailable
Live forecast
Destination
Kingsport, TN
Night
in Kingsport on Saturday
Local time
9:13 PM
EDT
Current temp
82°F
Unavailable
Live forecast
74°F
Lafayette, TN
209 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
28 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
7h 42m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Stones River National Battlefield
National Battlefield
The Battle of Stones River began on the last day of 1862 and became one of the bloodiest conflicts of the Civil War. The battle produced important military and political gains for the Union, and it ch...
21 mi from route
~52 min detour
Free
near mile 158.4
Ridge upon ridge of forest straddles the border between North Carolina and Tennessee in Great Smoky Mountains National Park. World renowned for its diversity of plant and animal life, the beauty of it...
28 mi from route
~71 min detour
Free
near mile 345.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a straightforward, interstate-heavy experience, as 97% of your travel takes place on major highways. You will spend the vast majority of your time on I-40, which accounts for a massive 337.5-mile stretch of the journey before you eventually transition onto I-81. This is a high-speed, efficiency-driven route rather than a winding backroad adventure, so prepare for a consistent interstate rhythm. Brief segments on US 45W help you navigate the initial leg of the trip before you merge onto the main arterial roads. Once you settle into the long haul on I-40, the drive becomes a steady, predictable grind that demands focus but offers few technical driving challenges.
97% highway — fuel and pacing are the main things to plan.
25 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 337.5 mi on I 40.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 40 and I 81. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 1.8 miles in near US 45W.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 417.5 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 1.8 miles (US 45W): Lane positioning matters here; at 140.2 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 143.4 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Humboldt, TN and Kingsport, TN, road signs point toward Huntsville, Louisville, Knoxville and Chattanooga.
Doable as a same-day drive at 7h 42m. Total distance: 417.5 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 42m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 337.5 miles on I 40. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Kingsport, TN before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 1.8 miles (US 45W): Lane positioning matters here; at 140.2 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 143.4 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Stones River National Battlefield and Great Smoky Mountains National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.7 hours each way, a round trip means 15.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Kingsport, TN before the return drive.
