How far is Plano, TX from South Alamo, TX?
The driving distance from Plano, TX to South Alamo, TX is about 542.3 miles (872.7 km), with a travel time of about 09h 27m by car.
- The straight-line flight distance is about 481.7 miles (775.2 km).
- For a round trip, plan for roughly 18h 55m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 09h 27m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 and the county seat of Guadalupe County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Plano and South Alamo.
Turn-by-Turn Driving Directions
Step-by-step road directions between Plano and South Alamo.
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1
Start on East 15th Street
1 km · 1 min · East 15th Street
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2
Turn left onto Central Expressway
919 ft · 18 sec · Central Expressway
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3
Take the ramp slight left toward US 75 South
798 ft · 19 sec
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4
Merge slight left onto Central Expressway
16.6 mi · 18 min · Central Expressway
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5
Take the exit slight left toward Downtown, Good-Latimer Expressway
153 m · 12 sec
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6
Continue on North Central Expressway
1.2 km · 1 min · North Central Expressway
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7
Turn right onto Elm Street
93 m · 11 sec · Elm Street
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8
Turn left onto North Pearl Expressway
1086 ft · 29 sec · North Pearl Expressway
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9
Turn right onto Young Street
572 ft · 20 sec · Young Street
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10
Turn left onto South Harwood Street
96 m · 8 sec · South Harwood Street
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11
Turn right onto Canton Street
2105 ft · 48 sec · Canton Street
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12
Take the ramp slight left toward I 30 West
1773 ft · 38 sec
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13
Keep slight left to continue on I 35E South, I 35E North: Waco, Denton
607 ft · 15 sec
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14
Keep slight left to continue on I 35E North, I 35E South: Denton, Waco
67 m · 5 sec
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15
Keep slight left to continue on I 35E South: Waco
1915 ft · 30 sec
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16
Continue on South R L Thornton Freeway
2866 ft · 44 sec · South R L Thornton Freeway
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17
Continue on South R L Thornton Freeway
89.3 mi · 1 hr 32 min · South R L Thornton Freeway
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18
Continue on North Jack Kultgen Expressway
6.6 mi · 8 min · North Jack Kultgen Expressway
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19
Continue on Purple Heart Trail
37.9 mi · 39 min · Purple Heart Trail
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20
Keep slight left
26.5 mi · 27 min
-
21
Take the exit slight right toward TX 130 Toll South: San Antonio
1.1 km · 56 sec
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22
Continue straight
86.1 mi · 1 hr 19 min
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23
Keep slight right to continue on I 10 West: San Antonio
3262 ft · 1 min
-
24
Merge slight left
11.1 mi · 11 min
-
25
Continue straight
9.4 mi · 9 min
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26
Keep slight left
12 mi · 13 min
-
27
Keep slight right to continue on Connally Loop
1.4 mi · 2 min · Connally Loop
-
28
Merge slight left onto Connally Loop
6.7 mi · 7 min · Connally Loop
-
29
Take the exit slight right toward I 37, US 281 North: San Antonio, Corpus Christi
1184 ft · 29 sec
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30
Keep slight left to continue on I 37 South: Corpus Christi
2457 ft · 1 min
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31
Merge slight left
60.5 mi · 1 hr 1 min
-
32
Take the exit slight right toward US 281 South
15.2 mi · 19 min
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33
Keep slight left to continue on South Nueces Street
66.2 mi · 1 hr 10 min · South Nueces Street
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34
Keep slight left
9.5 mi · 10 min
-
35
Keep slight left to continue on Falfurrias Expressway
55.8 mi · 59 min · Falfurrias Expressway
-
36
Keep slight left
18.4 mi · 20 min
-
37
Merge slight left
2577 ft · 34 sec
-
38
Continue straight
3 mi · 4 min
-
39
Take the exit slight right toward Tower Road
1280 ft · 31 sec
-
40
Turn straight onto East Expressway 83
2140 ft · 47 sec · East Expressway 83
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41
Turn right onto North Tower Road
2.3 mi · 5 min · North Tower Road
-
42
Turn left onto El Gato Road
2301 ft · 1 min · El Gato Road
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43
Turn left onto 2nd Street
640 ft · 28 sec · 2nd Street
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44
Arrive at your destination
0 m · 1 sec · 2nd Street
Car Route Details
A richer read on the saved driving route between Plano and South Alamo.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
South R L Thornton Freeway
Continue on South R L Thornton Freeway
89.3 mi · 01h 32m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Plano and Mostly Sunny then Chance Showers And Thunderstorms near South Alamo.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Plano to South Alamo?
The road trip is about 542.3 miles (872.7 km) and usually takes 09h 27m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Seguin is a useful midpoint, sitting about 271.7 miles from Plano and 270.5 miles from South Alamo.
How much longer is the road route than the straight-line distance?
The direct path is about 481.7 miles (775.2 km), while the road route adds roughly 60.6 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 7:30 AM CDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $72.29 one way or $144.58 round trip. Estimated CO2 is about 170 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Plano and Mostly Sunny then Chance Showers And Thunderstorms near South Alamo.
Stop Ideas Near Seguin
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
New Braunfels Parks and Recreation
Marion City Hall
Comal County Courthouse(Gerichtsgebäude)
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Seguin.
San Marcos Station
San Antonio Station
Austin
Flight Path Map
This map shows the direct air route between Plano and South Alamo. Straight-line distance: 481.66 mi (775.16 km).
#1 Plano
The second most populous city in Texas and the center of the Dallas-Fort Worth metropolitan area.
| Population | 291,296 |
| Coordinates | 33.0198400, -96.6988900 |
| Altitude | 203 |
| Country | United States |
#2 South Alamo
Census designated place
| Population | 3,361 |
| Coordinates | 26.1570200, -98.1086200 |
| Altitude | 29 |
| Country | United States |
End: South Alamo (-98.10862, 26.15702)
Estimated Travel Time
Distance: 873 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 18h 04m |
| 40 mph (64.37 km/h) | 13h 33m |
| 50 mph (80.47 km/h) | 10h 50m |
| 60 mph (96.56 km/h) | 09h 02m |
| 70 mph (112.65 km/h) | 07h 44m |
| 80 mph (129 km/h) | 06h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $72.29 | $144.58 |
| Mid-grade | $4.25 | $81.34 | $162.68 |
| Premium | $4.59 | $87.83 | $175.65 |
| Diesel | $3.99 | $76.39 | $152.77 |
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 · Jun 03, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.