How far is Port Sulphur, LA from Lafayette, LA?
The driving distance from Port Sulphur, LA to Lafayette, LA is about 182.9 miles (294.4 km), with a travel time of about 03h 12m by car.
- The straight-line flight distance is about 148.6 miles (239.1 km).
- For a round trip, plan for roughly 06h 24m 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 03h 12m.
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.
Neighborhood in Manhattan, New York City
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Port Sulphur and Lafayette.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Sulphur and Lafayette.
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1
Start on the route
39.8 mi · 52 min
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2
Turn right onto Behrman Highway
2.3 mi · 4 min · Behrman Highway
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3
Turn straight onto Behrman Place
1908 ft · 36 sec · Behrman Place
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4
Keep slight left to continue on Behrman Place
1567 ft · 45 sec · Behrman Place
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5
At the end of the road, turn left onto General de Gaulle Drive
1.2 mi · 2 min · General de Gaulle Drive
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6
Take the ramp straight toward US 90 Business East: New Orleans
2126 ft · 42 sec
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7
Merge slight left onto Westbank Expressway
1.5 km · 1 min · Westbank Expressway
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8
Continue on Crescent City Connection
1 km · 58 sec · Crescent City Connection
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9
Continue on Pontchartrain Expressway
80.6 mi · 1 hr 32 min · Pontchartrain Expressway
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10
Keep slight left
52.6 mi · 1 hr
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11
Take the exit slight right toward US 167: Morgan City
1688 ft · 41 sec
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12
Merge slight left onto Veterans Memorial Expressway
1669 ft · 24 sec · Veterans Memorial Expressway
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13
Continue on Northwest Evangeline Thruway
1.9 mi · 3 min · Northwest Evangeline Thruway
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14
Turn right onto Jefferson Boulevard
1147 ft · 34 sec · Jefferson Boulevard
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15
Continue on Rue Jefferson
1654 ft · 52 sec · Rue Jefferson
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16
Turn right onto Rue Vermilion Ouest
102 m · 17 sec · Rue Vermilion Ouest
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17
Arrive at your destination
0 m · 1 sec · Rue Vermilion Ouest
Car Route Details
A richer read on the saved driving route between Port Sulphur and Lafayette.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Pontchartrain Expressway
Continue on Pontchartrain Expressway
80.6 mi · 01h 32m
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.
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms leaving Port Sulphur and Chance Showers And Thunderstorms near Lafayette.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Port Sulphur to Lafayette?
The road trip is about 182.9 miles (294.4 km) and usually takes 03h 12m 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?
Gramercy is a useful midpoint, sitting about 91 miles from Port Sulphur and 91.9 miles from Lafayette.
How much longer is the road route than the straight-line distance?
The direct path is about 148.6 miles (239.1 km), while the road route adds roughly 34.3 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 10:36 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.46 one way or $48.93 round trip. Estimated CO2 is about 57.4 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms around Port Sulphur and Chance Showers And Thunderstorms near Lafayette.
Stop Ideas Near Gramercy
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Port Vincent Clerks Office
French Settlement Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Gramercy.
Schriever
Hammond
New Orleans Union Passenger Terminal
Baton Rouge, Louisiana
Flight Path Map
This map shows the direct air route between Port Sulphur and Lafayette. Straight-line distance: 148.54 mi (239.06 km).
#1 Port Sulphur
City in Louisiana, United States of America
| Population | 1,760 |
| Coordinates | 29.4804900, -89.6939500 |
| Altitude | 1 |
| Country | United States |
#2 Lafayette
The third most populous city in Acadiana, Louisiana.
| Population | 126,535 |
| Coordinates | 30.2240900, -92.0198400 |
| Altitude | 11 |
| Country | United States |
End: South Buchanan Street (-92.019794, 30.224075)
Estimated Travel Time
Distance: 294 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 05m |
| 40 mph (64.37 km/h) | 04h 34m |
| 50 mph (80.47 km/h) | 03h 39m |
| 60 mph (96.56 km/h) | 03h 02m |
| 70 mph (112.65 km/h) | 02h 36m |
| 80 mph (129 km/h) | 02h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $24.46 | $48.93 |
| Mid-grade | $4.26 | $27.51 | $55.03 |
| Premium | $4.63 | $29.88 | $59.76 |
| Diesel | $5.42 | $34.98 | $69.96 |
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 · 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.