Traveling from Port Sulphur to Lafayette covers 182.1 miles and typically takes about 3 hours and 41 minutes. Because this is a straightforward, highway-focused journey, you can easily complete it in a single day without needing an overnight stay. Expect to spend approximately $28 on fuel, making it an affordable trip across Southeast Louisiana. You will primarily utilize LA 23, the Pontchartrain Expressway, and I-10 to make your way between these two points. Since the route stays entirely within the Southeast region of the state, you will find the transition between these locales to be consistent and efficient. It is a practical choice if you are looking for a reliable, no-nonsense path to your destination.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
91.1 miles from Port Sulphur, LA
A natural place for your longest stop of the day
, about 1h 54m into the drive
.
Main Roads
Road
Distance
Duration
Pontchartrain Expressway
80.6 mi
1h 32m
I 10
52.6 mi
1h
LA 23
39.8 mi
52m
Behrman Highway
2.3 mi
4m
Northwest Evangeline Thruway
1.9 mi
3m
General de Gaulle Drive
1.2 mi
2m
Westbank Expressway
0.9 mi
1m
Behrman Place
0.7 mi
1m
Longest stretch:
Pontchartrain Expressway
— 80.6 mi, about 1h 32m
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Sulphur, LA and Lafayette, LA.
1
Start on LA 23
40 mi·52 min·LA 23
2
Turn right onto LA 428
2.3 mi·4 min·Behrman Highway
3
Turn straight onto LA 428
0.4 mi·36 sec·Behrman Place
4
Keep slight left at fork onto LA 428
0.3 mi·45 sec·Behrman Place
5
At end of road, turn left onto LA 428
1.2 mi·2 min·General de Gaulle Drive
6
Take the ramp
0.4 mi·42 sec
Toward US 90 Business East: New Orleans
7
Merge onto US 90 BUS
0.9 mi·1 min·Westbank Expressway
8
Continue on US 90 BUS
0.6 mi·57 sec·Crescent City Connection
9
Continue on US 90 BUS
81 mi·1 hr 32 min·Pontchartrain Expressway
Use the straight / slight right lanes.
10
Keep slight left at fork onto I 10
53 mi·1 hr·I 10
Use the straight / slight right lanes.
11
Take the exit
0.3 mi·41 sec
Toward US 167: Morgan City
12
Merge onto I 49
0.3 mi·23 sec·Veterans Memorial Expressway
13
Continue on I 49; LA 182
1.9 mi·3 min·Northwest Evangeline Thruway
14
Turn right onto Jefferson Boulevard
0.2 mi·33 sec·Jefferson Boulevard
15
Continue on Rue Jefferson
0.3 mi·51 sec·Rue Jefferson
16
Turn right onto Rue Vermilion Ouest
335 ft·16 sec·Rue Vermilion Ouest
17
Arrive at destination
Rue Vermilion Ouest
Trip Plan
Planning for this 3 hour and 41 minute drive is simple, as the route is well-suited for a single-day excursion. You should budget for at least one stop to break up the monotony of the 96 percent highway-heavy commute. Since fuel will cost roughly $28, filling up before you leave Port Sulphur will help you maintain a smooth pace once you hit the interstate. Given the highway-focused nature of the trip, try to avoid peak traffic hours on the Pontchartrain Expressway to ensure you don't lose time in congestion. By staying mindful of your fuel and pacing your single planned stop, you can reach Lafayette comfortably and efficiently.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 91.1 miles from Port Sulphur, LA, or about 1h 54m into the drive.
The longest continuous stretch on this route runs about 80.6 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 40 miles or 52m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 91.1 miles or 1h 54m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 1m
Traffic, exits, and arrival timing usually matter more near Lafayette, LA than in the middle of the route.
Before You Leave
+
Open the route before leaving Port Sulphur, LA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Port Sulphur, LA
This is one driving day of about 182.1 miles and 3h 41m.
Your first comfortable stop window is around 40 miles from Port Sulphur, LA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Pontchartrain Expressway for about 80.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 9
5 decision points cluster between mile 42.4 and 181.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
42.4 mi into trip|~57m in|LA 428 / Behrman Place
Keep slight left at fork onto LA 428 / Behrman Place
Highway fork - watch signs carefully
4
42.7 mi into trip|~57m in|LA 428 / General de Gaulle Drive
At end of road, turn left onto LA 428 / General de Gaulle Drive
Navigation decision point
6
126.5 mi into trip|~2h 35m in|I 10
Keep slight left at fork onto I 10
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
4
179 mi into trip|~3h 35m in
Take the exit toward US 167: Morgan City
Exit ramp - move to the correct lane early
Toward US 167: Morgan City
4
181.6 mi into trip|~3h 39m in|Jefferson Boulevard
Turn right onto Jefferson Boulevard
Navigation decision point
Fuel & Cost
Regular Gas
$27.50 one way
$55.00 round trip
$3.84/gal25.4 MPG avg64 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.21
$30.19
$60.38
premium
$4.56
$32.68
$65.37
diesel
$5.61
$40.21
$80.41
Estimated Tolls: $0.13
Northwest Evangeline Thruway
(1.9 mi)$0.13
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$28
Tolls
$0
Meals
$25–$50
Total
$53–$78
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 63.7 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $19 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
54.6
0
$19.12
$8.74
Efficient EV
45.5
0
$15.93
$7.28
EV Truck/SUV
72.8
0
$25.49
$11.65
Gas CO2
64 kg
EV CO2
21 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Port Sulphur, LA
Late night
in Port Sulphur on Sunday
Local time
5:19 AM
CDT
Current temp
74°F
Unavailable
Live forecast
Destination
Lafayette, LA
Late night
in Lafayette on Sunday
Local time
5:19 AM
CDT
Current temp
61°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
13 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
3h 41m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
New Orleans Jazz National Historical Park
National Historical Park
Discover the roots of jazz at the New Orleans Jazz National Historical Park. Located in the heart of the French Quarter, our park offers live performances, exhibits, and programs that celebrate the le...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is heavily weighted toward high-speed travel, with 96 percent of the route consisting of highway driving. You will spend your longest uninterrupted stretch covering 80.6 miles on the Pontchartrain Expressway, which dictates the pace for much of your journey. Transitioning from the regional roads of Port Sulphur onto the major interstate network creates a distinct shift from quiet local transit to a faster, more industrial flow. Expect a consistent, efficient experience behind the wheel rather than a winding or technical drive. While the environment remains largely interstate-focused, the transition onto I-10 provides a steady, predictable rhythm that carries you through the majority of your 182.1-mile trek.
96% highway — fuel and pacing are the main things to plan.
17 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 80.6 mi on Pontchartrain Expressway.
How Hard Is This Drive?
5/10
This is a straightforward highway drive that stays mostly on Pontchartrain Expressway and I 10. You will hit about 9 points where you need to pay attention to lane position or signs. The trickiest moment comes around 42.4 miles in near LA 428 / Behrman Place.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 182.1 miles you will encounter 9 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 42.4 miles (LA 428 / Behrman Place): Highway fork - watch signs carefully; at 42.7 miles (LA 428 / General de Gaulle Drive): Navigation decision point; at 126.5 miles (I 10): Highway fork - watch signs carefully. Lane positioning matters here.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 41m. Total distance: 182.1 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 41m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (96%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 80.6 miles on Pontchartrain Expressway. The full list of main roads is in the Roads section above.
Expect about $0.13 in tolls one way, starting with Northwest Evangeline Thruway. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 42.4 miles (LA 428 / Behrman Place): Highway fork - watch signs carefully; at 42.7 miles (LA 428 / General de Gaulle Drive): Navigation decision point; at 126.5 miles (I 10): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — New Orleans Jazz National Historical Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 3.7 hours each way, an in-and-out day trip would put you behind the wheel for 7.4 hours — manageable with a long break at Lafayette, LA, but most travelers stay overnight.
