How far is Dallas, TX from Southmayd, TX?
The driving distance from Dallas, TX to Southmayd, TX is about 72.5 miles (116.7 km), with a travel time of about 01h 21m by car.
- The straight-line flight distance is about 58.6 miles (94.3 km).
- For a round trip, plan for roughly 02h 42m 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 21m.
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 Collin County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Dallas and Southmayd.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dallas and Southmayd.
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1
Start on North Lamar Street
132 m · 14 sec · North Lamar Street
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2
Turn right onto McKinney Avenue
1118 ft · 25 sec · McKinney Avenue
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3
Take the ramp slight left toward US 75 North
1229 ft · 30 sec
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4
Merge slight left onto Woodall Rodgers Freeway
2170 ft · 37 sec · Woodall Rodgers Freeway
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5
Keep slight left to continue on US 75 North: McKinney, Hall Street, Lemmon Avenue
898 ft · 22 sec
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6
Keep slight left to continue on US 75 North: McKinney
1523 ft · 37 sec
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7
Merge slight right onto North Central Expressway
44.7 mi · 48 min · North Central Expressway
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8
Continue on South Henry Hynds Expressway
10.1 mi · 10 min · South Henry Hynds Expressway
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9
Continue on South Sam Rayburn Freeway
6.4 mi · 7 min · South Sam Rayburn Freeway
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10
Take the exit slight right toward TX 56: Lamar Street, Houston Street
1016 ft · 25 sec
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11
Turn straight onto South Sam Rayburn Freeway
1384 ft · 37 sec · South Sam Rayburn Freeway
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12
Turn left onto West Houston Street
2.8 mi · 4 min · West Houston Street
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13
Continue on State Highway 56
6.3 mi · 7 min · State Highway 56
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14
Turn right onto McElroy Street
1497 ft · 1 min · McElroy Street
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15
Turn right onto Belknap Road
118 m · 17 sec · Belknap Road
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16
Arrive at your destination
0 m · 1 sec · Belknap Road
Car Route Details
A richer read on the saved driving route between Dallas 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.
North Central Expressway
Merge slight right onto North Central Expressway
44.7 mi · 00h 48m
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.
Mostly Cloudy leaving Dallas and Mostly Cloudy near Southmayd.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dallas to Southmayd?
The road trip is about 72.5 miles (116.7 km) and usually takes 01h 21m 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?
Melissa is a useful midpoint, sitting about 36.3 miles from Dallas and 36.2 miles from Southmayd.
How much longer is the road route than the straight-line distance?
The direct path is about 58.6 miles (94.3 km), while the road route adds roughly 13.9 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 3:48 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $9.67 one way or $19.35 round trip. Estimated CO2 is about 22.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Dallas and Mostly Cloudy near Southmayd.
Stop Ideas Near Melissa
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Town of Prosper City Hall
City of McKinney
Mckinney City Office
City Hall Plaza Park
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Melissa.
Mesquite, TX
Dallas, TX
Union Station
Gainesville
Flight Path Map
This map shows the direct air route between Dallas and Southmayd. Straight-line distance: 58.58 mi (94.28 km).
#1 Dallas
The ninth most populous city in the United States and the center of the Dallas-Fort Worth metropolitan area.
| Population | 1,343,266 |
| Coordinates | 32.7830600, -96.8066700 |
| Altitude | 128 |
| 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: 117 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 24m |
| 40 mph (64.37 km/h) | 01h 48m |
| 50 mph (80.47 km/h) | 01h 26m |
| 60 mph (96.56 km/h) | 01h 12m |
| 70 mph (112.65 km/h) | 01h 02m |
| 80 mph (129 km/h) | 00h 54m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $9.67 | $19.35 |
| Mid-grade | $4.25 | $10.89 | $21.77 |
| Premium | $4.59 | $11.75 | $23.51 |
| Diesel | $3.99 | $10.22 | $20.44 |
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.