How far is Sour Lake, TX from Plano, TX?
The driving distance from Sour Lake, TX to Plano, TX is about 300.6 miles (483.8 km), with a travel time of about 04h 52m by car.
- The straight-line flight distance is about 240.2 miles (386.6 km).
- For a round trip, plan for roughly 09h 45m 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 04h 52m.
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 Leon County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms then Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Sour Lake and Plano.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sour Lake and Plano.
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1
Start on 5th Street
40.7 mi · 1 hr 1 min · 5th Street
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2
At the end of the road, turn right onto East Houston Street
6.2 mi · 9 min · East Houston Street
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3
Turn left onto Washington Avenue
2872 ft · 52 sec · Washington Avenue
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4
Turn right onto West Southline Street
15.2 mi · 23 min · West Southline Street
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5
Turn right onto Willis Waukegan Road
5.8 mi · 9 min · Willis Waukegan Road
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6
Continue straight
5.1 mi · 9 min
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7
Turn right onto South Danville Street
2760 ft · 52 sec · South Danville Street
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8
Continue on North State Highway 75
2 mi · 3 min · North State Highway 75
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9
Turn left onto Calvary Road
621 ft · 18 sec · Calvary Road
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10
Take the ramp right
2656 ft · 1 min
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11
Merge slight left
188.8 mi · 3 hr 12 min
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12
Continue on North Central Expressway
15.2 mi · 16 min · North Central Expressway
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13
Take the exit slight right toward Plano Parkway, 15th Street
2162 ft · 53 sec
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14
Turn straight onto North Central Expressway
1.4 mi · 2 min · North Central Expressway
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15
Turn right onto East 15th Street
3101 ft · 1 min · East 15th Street
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16
Arrive at your destination
0 m · 1 sec · East 15th Street
Car Route Details
A richer read on the saved driving route between Sour Lake and Plano.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Calvary Road
Merge slight left
189 mi · 03h 12m
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 then Showers And Thunderstorms leaving Sour Lake and Slight Chance Showers And Thunderstorms near Plano.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sour Lake to Plano?
The road trip is about 300.6 miles (483.8 km) and usually takes 04h 52m 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?
Leona is a useful midpoint, sitting about 141.7 miles from Sour Lake and 158.9 miles from Plano.
How much longer is the road route than the straight-line distance?
The direct path is about 240.2 miles (386.6 km), while the road route adds roughly 60.4 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 7:14 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $40.10 one way or $80.19 round trip. Estimated CO2 is about 94.3 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms then Showers And Thunderstorms around Sour Lake and Slight Chance Showers And Thunderstorms near Plano.
Stop Ideas Near Leona
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 Leona.
Bryan, TX
Waco, TX
Flight Path Map
This map shows the direct air route between Sour Lake and Plano. Straight-line distance: 240.23 mi (386.62 km).
#1 Sour Lake
City in Hardin County, Texas, United States
| Population | 1,948 |
| Coordinates | 30.1402100, -94.4110200 |
| Altitude | 15 |
| Country | United States |
#2 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 |
End: East 15th Street (-96.698873, 33.019694)
Estimated Travel Time
Distance: 484 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 01m |
| 40 mph (64.37 km/h) | 07h 30m |
| 50 mph (80.47 km/h) | 06h 00m |
| 60 mph (96.56 km/h) | 05h 00m |
| 70 mph (112.65 km/h) | 04h 17m |
| 80 mph (129 km/h) | 03h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $40.10 | $80.19 |
| Mid-grade | $4.25 | $45.11 | $90.23 |
| Premium | $4.59 | $48.71 | $97.42 |
| Diesel | $3.99 | $42.37 | $84.73 |
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 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.