How far is Plano, TX from Southmayd, TX?
The driving distance from Plano, TX to Southmayd, TX is about 55 miles (88.5 km), with a travel time of about 01h 02m by car.
- The straight-line flight distance is about 42.4 miles (68.2 km).
- For a round trip, plan for roughly 02h 05m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
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.
This route works well as a day trip with time at the destination.
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 01h 02m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 Texas, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Showers And Thunderstorms
Patchy Fog
Driving Route Map
The map below follows the saved road route between Plano and Southmayd.
Turn-by-Turn Driving Directions
Step-by-step road directions between Plano and Southmayd.
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1
Start on East 15th Street
3103 ft · 1 min · East 15th Street
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2
Turn right onto Central Expressway
1.4 km · 1 min · Central Expressway
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3
Take the ramp slight left toward US 75 North
1282 ft · 31 sec
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4
Merge slight left onto Central Expressway
26.9 mi · 29 min · Central Expressway
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5
Continue on South Henry Hynds Expressway
10.1 mi · 10 min · South Henry Hynds Expressway
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6
Continue on South Sam Rayburn Freeway
6.4 mi · 7 min · South Sam Rayburn Freeway
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7
Take the exit slight right toward TX 56: Lamar Street, Houston Street
1016 ft · 25 sec
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8
Turn straight onto South Sam Rayburn Freeway
1384 ft · 37 sec · South Sam Rayburn Freeway
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9
Turn left onto West Houston Street
2.8 mi · 4 min · West Houston Street
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10
Continue on State Highway 56
6.3 mi · 7 min · State Highway 56
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11
Turn right onto McElroy Street
1497 ft · 1 min · McElroy Street
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12
Turn right onto Belknap Road
118 m · 17 sec · Belknap Road
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13
Arrive at your destination
0 m · 1 sec · Belknap Road
Car Route Details
A richer read on the saved driving route between Plano and Southmayd.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Central Expressway
Merge slight left onto Central Expressway
26.9 mi · 00h 29m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
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.
Slight Chance Showers And Thunderstorms leaving Plano and Patchy Fog near Southmayd.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Plano to Southmayd?
The road trip is about 55 miles (88.5 km) and usually takes 01h 02m 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?
Van Alstyne is a useful midpoint, sitting about 27.5 miles from Plano and 27.5 miles from Southmayd.
How much longer is the road route than the straight-line distance?
The direct path is about 42.4 miles (68.2 km), while the road route adds roughly 12.6 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 4:24 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.33 one way or $14.66 round trip. Estimated CO2 is about 17.2 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Showers And Thunderstorms around Plano and Patchy Fog near Southmayd.
Stop Ideas Near Van Alstyne
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Plaza Park
City of McKinney
Mckinney City Office
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Van Alstyne.
Gainesville
Mesquite, TX
Union Station
Dallas, TX
Flight Path Map
This map shows the direct air route between Plano and Southmayd. Straight-line distance: 42.38 mi (68.2 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 Southmayd
City in Grayson County, Texas, United States
| Population | 1,176 |
| Coordinates | 33.6303800, -96.7691600 |
| Altitude | 224 |
| Country | United States |
End: Southmayd (-96.76916, 33.63038)
Estimated Travel Time
Distance: 88 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 49m |
| 40 mph (64.37 km/h) | 01h 22m |
| 50 mph (80.47 km/h) | 01h 05m |
| 60 mph (96.56 km/h) | 00h 54m |
| 70 mph (112.65 km/h) | 00h 47m |
| 80 mph (129 km/h) | 00h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $7.33 | $14.66 |
| Mid-grade | $4.25 | $8.25 | $16.50 |
| Premium | $4.59 | $8.91 | $17.81 |
| Diesel | $3.99 | $7.75 | $15.49 |
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.