How far is Donaldsonville, LA from Sulphur, LA?
The driving distance from Donaldsonville, LA to Sulphur, LA is about 165.1 miles (265.7 km), with a travel time of about 02h 45m by car.
- The straight-line flight distance is about 142.7 miles (229.6 km).
- For a round trip, plan for roughly 05h 31m 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 02h 45m.
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.
The third most populous city in Acadiana, Louisiana.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Donaldsonville and Sulphur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Donaldsonville and Sulphur.
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1
Start on West 10th Street
1.6 km · 1 min · West 10th Street
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2
Continue on Highway 1 North
18.5 mi · 22 min · Highway 1 North
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3
Continue on Church Street
1 mi · 2 min · Church Street
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4
Continue on Highway 1
11.6 mi · 17 min · Highway 1
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5
Take the exit slight right toward I 10 West: Lafayette
2327 ft · 57 sec
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6
Merge slight left
126.4 mi · 2 hr 20 min
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7
Take the exit slight right toward US 90 West
1377 ft · 34 sec
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8
Keep slight right
5.9 mi · 9 min
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9
Arrive at your destination
0 m · 1 sec · East Napoleon Street
Car Route Details
A richer read on the saved driving route between Donaldsonville and Sulphur.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 10 West
Merge slight left
126 mi · 02h 20m
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.
Sunny leaving Donaldsonville and Mostly Sunny near Sulphur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Donaldsonville to Sulphur?
The road trip is about 165.1 miles (265.7 km) and usually takes 02h 45m 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?
Lafayette is a useful midpoint, sitting about 82.5 miles from Donaldsonville and 82.6 miles from Sulphur.
How much longer is the road route than the straight-line distance?
The direct path is about 142.7 miles (229.6 km), while the road route adds roughly 22.4 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 12:58 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $22.81 one way or $45.61 round trip. Estimated CO2 is about 51.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Donaldsonville and Mostly Sunny near Sulphur.
Stop Ideas Near Lafayette
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Parks City Hall
Lafayette Consolidated Government
Housing Authority of Lafayette
City of St. Martinville Tourist Information Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Lafayette.
Lafayette
New Iberia
Baton Rouge, Louisiana
Lake Charles
Flight Path Map
This map shows the direct air route between Donaldsonville and Sulphur. Straight-line distance: 142.67 mi (229.6 km).
#1 Donaldsonville
City in Louisiana, United States
| Population | 8,638 |
| Coordinates | 30.1011400, -90.9941200 |
| Altitude | 7 |
| Country | United States |
#2 Sulphur
Suburb city of Lake Charles, located in Calcasieu Parish, Louisiana, United States
| Population | 20,120 |
| Coordinates | 30.2365900, -93.3773800 |
| Altitude | 5 |
| Country | United States |
End: East Napoleon Street (-93.377405, 30.236609)
Estimated Travel Time
Distance: 266 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 30m |
| 40 mph (64.37 km/h) | 04h 07m |
| 50 mph (80.47 km/h) | 03h 18m |
| 60 mph (96.56 km/h) | 02h 45m |
| 70 mph (112.65 km/h) | 02h 21m |
| 80 mph (129 km/h) | 02h 03m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.91 | $22.81 | $45.61 |
| Mid-grade | $4.38 | $25.51 | $51.02 |
| Premium | $4.78 | $27.87 | $55.75 |
| Diesel | $5.82 | $33.95 | $67.90 |
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 Louisiana · Oct 15, 2026