How far is Mart, TX from San Antonio, TX?
The driving distance from Mart, TX to San Antonio, TX is about 215.7 miles (347.2 km), with a travel time of about 03h 18m by car.
- The straight-line flight distance is about 176.6 miles (284.2 km).
- For a round trip, plan for roughly 06h 36m 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 18m.
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.
The fourth most populous city in Williamson County, Texas.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Mart and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mart and San Antonio.
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1
Start on East Texas Avenue
7.8 mi · 12 min · East Texas Avenue
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2
Merge slight left onto East State Highway 6
6.5 mi · 7 min · East State Highway 6
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3
Take the exit slight right
1450 ft · 35 sec
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4
Turn left onto East Loop 340
5.6 mi · 7 min · East Loop 340
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5
Take the exit slight right toward I 35: Dallas-Fort Worth, Austin
1031 ft · 25 sec
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6
Turn straight onto South Loop 340
1097 ft · 22 sec · South Loop 340
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7
Continue on South Loop 340
3110 ft · 1 min · South Loop 340
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8
Turn slight right onto I 35 South: Austin
1139 ft · 50 sec
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9
Turn straight onto South Interstate 35
1.1 mi · 2 min · South Interstate 35
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10
Take the ramp slight left toward I 35 South
2288 ft · 56 sec
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11
Merge slight left onto Purple Heart Trail
36.1 mi · 37 min · Purple Heart Trail
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12
Keep slight left
55.8 mi · 59 min
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13
Keep slight left to continue on Purple Heart Trail
49.8 mi · 55 min · Purple Heart Trail
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14
Continue on Interstate Highway 35
1.7 mi · 2 min · Interstate Highway 35
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15
Continue on Purple Heart Trail
11.9 mi · 13 min · Purple Heart Trail
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16
Continue on North Pan Am Expressway
10 mi · 12 min · North Pan Am Expressway
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17
Keep slight left to continue on North Pan Am Expressway
6.4 mi · 8 min · North Pan Am Expressway
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18
Keep slight left to continue on North Pan Am Expressway
2907 ft · 41 sec · North Pan Am Expressway
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19
Take the exit slight right toward Lexington Avenue, Main Avenue, San Pedro Avenue
684 ft · 17 sec
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20
Turn straight onto East Elmira Street
526 ft · 17 sec · East Elmira Street
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21
Turn left onto North Main Avenue
830 ft · 19 sec · North Main Avenue
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22
Enter the roundabout and take exit 2 toward Navarro Street
49 m · 3 sec · Navarro Street
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23
Exit the roundabout onto Navarro Street
34 m · 2 sec · Navarro Street
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24
Keep slight right to continue on North Main Avenue
2181 ft · 52 sec · North Main Avenue
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25
Turn right onto West Travis Street
68 m · 11 sec · West Travis Street
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26
Turn left onto North Flores Street
807 ft · 20 sec · North Flores Street
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27
Continue on Military Plaza
119 m · 16 sec · Military Plaza
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28
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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29
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Mart and San Antonio.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Purple Heart Trail
Keep slight left
55.8 mi · 00h 59m
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.
Chance Showers And Thunderstorms leaving Mart and Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mart to San Antonio?
The road trip is about 215.7 miles (347.2 km) and usually takes 03h 18m 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?
Round Rock is a useful midpoint, sitting about 98.4 miles from Mart and 117.4 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 176.6 miles (284.2 km), while the road route adds roughly 39.1 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:24 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.76 one way or $57.52 round trip. Estimated CO2 is about 67.6 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Mart and Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms near San Antonio.
Stop Ideas Near Round Rock
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 Round Rock.
Taylor
Austin
Killeen, Texas
Fort Hood, Texas
Flight Path Map
This map shows the direct air route between Mart and San Antonio. Straight-line distance: 176.6 mi (284.21 km).
#1 Mart
City in McLennan County, Texas, United States
| Population | 1,983 |
| Coordinates | 31.5423900, -96.8336000 |
| Altitude | 160 |
| Country | United States |
#2 San Antonio
The seventh most populous city in the United States and the center of the San Antonio metropolitan area.
| Population | 1,567,118 |
| Coordinates | 29.4241200, -98.4936300 |
| Altitude | 198 |
| Country | United States |
End: Dolorosa Street (-98.493645, 29.424163)
Estimated Travel Time
Distance: 347 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 11m |
| 40 mph (64.37 km/h) | 05h 23m |
| 50 mph (80.47 km/h) | 04h 18m |
| 60 mph (96.56 km/h) | 03h 35m |
| 70 mph (112.65 km/h) | 03h 04m |
| 80 mph (129 km/h) | 02h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $28.76 | $57.52 |
| Mid-grade | $4.25 | $32.36 | $64.72 |
| Premium | $4.59 | $34.94 | $69.88 |
| Diesel | $3.99 | $30.39 | $60.77 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.