How far is Houston, TX from Karnes City, TX?
The driving distance from Houston, TX to Karnes City, TX is about 198.8 miles (319.9 km), with a travel time of about 03h 34m by car.
- The straight-line flight distance is about 164.5 miles (264.7 km).
- For a round trip, plan for roughly 07h 08m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 34m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
City in Fayette County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Houston and Karnes City.
Turn-by-Turn Driving Directions
Step-by-step road directions between Houston and Karnes City.
-
1
Start on Louisiana Street
761 ft · 25 sec · Louisiana Street
-
2
Take the ramp straight toward I 10 West: San Antonio
2149 ft · 52 sec
-
3
Merge slight right onto Katy Freeway
140.3 mi · 2 hr 27 min · Katy Freeway
-
4
Take the exit slight right toward TX 80: San Marcos, Nixon
1139 ft · 28 sec
-
5
Continue on Ih 10 East Access Road
611 ft · 20 sec · Ih 10 East Access Road
-
6
Turn left
56.7 mi · 1 hr 3 min
-
7
Turn left onto North Badger Drive
1755 ft · 44 sec · North Badger Drive
-
8
Turn right onto Weir Street
14 m · 4 sec · Weir Street
-
9
Turn left onto Badgerette Drive
991 ft · 20 sec · Badgerette Drive
-
10
Turn straight onto East Calvert Avenue
1791 ft · 36 sec · East Calvert Avenue
-
11
Arrive at your destination
0 m · 1 sec · East Calvert Avenue
Car Route Details
A richer read on the saved driving route between Houston and Karnes City.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Katy Freeway
Merge slight right onto Katy Freeway
140 mi · 02h 27m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Partly Sunny leaving Houston and Partly Sunny near Karnes City.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Houston to Karnes City?
The road trip is about 198.8 miles (319.9 km) and usually takes 03h 34m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Schulenburg is a useful midpoint, sitting about 99.3 miles from Houston and 99.4 miles from Karnes City.
How much longer is the road route than the straight-line distance?
The direct path is about 164.5 miles (264.7 km), while the road route adds roughly 34.3 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 9:52 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $26.49 one way or $52.98 round trip. Estimated CO2 is about 62.3 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Houston and Partly Sunny near Karnes City.
Stop Ideas Near Schulenburg
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Schulenburg.
Prairie View, TX
San Marcos Station
Austin
Taylor
Flight Path Map
This map shows the direct air route between Houston and Karnes City. Straight-line distance: 164.46 mi (264.68 km).
#1 Houston
The fourth most populous city in the United States and the center of the Houston metropolitan area.
| Population | 2,316,120 |
| Coordinates | 29.7632800, -95.3632700 |
| Altitude | 12 |
| Country | United States |
#2 Karnes City
City in Karnes County, Texas, United States
| Population | 3,383 |
| Coordinates | 28.8849800, -97.9008400 |
| Altitude | 131 |
| Country | United States |
End: Karnes City (-97.90084, 28.88498)
Estimated Travel Time
Distance: 320 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 37m |
| 40 mph (64.37 km/h) | 04h 58m |
| 50 mph (80.47 km/h) | 03h 58m |
| 60 mph (96.56 km/h) | 03h 18m |
| 70 mph (112.65 km/h) | 02h 50m |
| 80 mph (129 km/h) | 02h 28m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $26.49 | $52.98 |
| Mid-grade | $4.25 | $29.81 | $59.61 |
| Premium | $4.59 | $32.18 | $64.37 |
| Diesel | $3.99 | $27.99 | $55.98 |
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 Texas · Apr 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.