This 339.9-mile journey from Plano, TX to Port Lavaca, TX is designed for a single day of travel, taking approximately 6 hours and 28 minutes. You'll navigate primarily on local roads, indicated by the 0% highway share, making it a more involved drive than a typical interstate trip. Expect a fuel cost of around $52 for this route. Since it's a turn-heavy local drive, plan for a steady pace rather than long, uninterrupted stretches. Both your origin and destination are within the Great Plains region, so you won't be crossing major geographical divides.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
170 miles from Plano, TX
A natural place for your longest stop of the day
, about 3h 6m into the drive
.
Main Roads
Road
Distance
Duration
US 77
120.2 mi
2h 20m
South R L Thornton Freeway
89.9 mi
1h 32m
United States Highway 77
44.5 mi
53m
Robinson Drive
29.5 mi
33m
Port Lavaca Drive
21.3 mi
25m
Central Expressway
16.8 mi
18m
US 87
5.4 mi
7m
North Jack Kultgen Expressway
4.3 mi
4m
Longest stretch:
US 77
— 120.2 mi, about 2h 20m
Turn-by-Turn Driving Directions
Step-by-step road directions between Plano, TX and Port Lavaca, TX.
1
Start on East 15th Street
0.6 mi·1 min·East 15th Street
Use the straight lane.
2
Turn left onto Central Expressway
0.2 mi·17 sec·Central Expressway
Use the left / straight lanes.
3
Take the ramp
0.2 mi·19 sec
Toward US 75 South
4
Merge onto US 75
17 mi·17 min·Central Expressway
Use the straight / slight right lanes.
5
Take the exit
501 ft·12 sec
Exit 284CToward Downtown, Good-Latimer ExpresswayUse the slight left lane.
6
Continue on North Central Expressway
0.7 mi·1 min·North Central Expressway
Use the left / straight lanes.
7
Turn right onto Elm Street
304 ft·10 sec·Elm Street
8
Turn left onto North Pearl Expressway
0.2 mi·28 sec·North Pearl Expressway
Use the straight lane.
9
Turn right onto Young Street
0.1 mi·19 sec·Young Street
10
Turn left onto South Harwood Street
315 ft·8 sec·South Harwood Street
Use the left lane.
11
Turn right onto Canton Street
0.4 mi·47 sec·Canton Street
12
Take the ramp
0.3 mi·38 sec
Toward I 30 West
13
Keep slight left at fork
0.1 mi·14 sec
Toward I 35E South, I 35E North: Waco, Denton
14
Keep slight left at fork
221 ft·5 sec
Toward I 35E North, I 35E South: Denton, WacoUse the straight / slight right lanes.
15
Keep slight left at fork
0.4 mi·30 sec
Toward I 35E South: WacoUse the left / right lanes.
16
Continue on I 35E
0.5 mi·44 sec·South R L Thornton Freeway
17
Continue on I 35E
89 mi·1 hr 31 min·South R L Thornton Freeway
Exit 426Toward Dallas ZooUse the straight / slight right lanes.
18
Continue on I 35; US 77
4.3 mi·4 min·North Jack Kultgen Expressway
Use the straight / slight right lanes.
19
Take the exit
0.2 mi·30 sec
Exit 333AToward Loop 396
20
Turn straight onto South Jack Kultgen Expressway
0.1 mi·24 sec·South Jack Kultgen Expressway
21
Turn left onto Loop 396
0.1 mi·19 sec·South Valley Mills Drive
22
Enter roundabout onto Robinson Drive
125 ft·5 sec·Robinson Drive
23
Continue on Robinson Drive
29 mi·33 min·Robinson Drive
Use the straight / left lanes.
24
Continue on US 77
19 mi·21 min·US 77
25
Turn left onto US 77; US 190; TX 36
0.3 mi·19 sec·East 4th Street
26
Continue on US 77; US 190; TX 36
0.2 mi·16 sec·Kemp Street
27
Continue on US 77; US 190; TX 36
2.9 mi·3 min·East 1st Street
28
Take the exit onto US 77
101 mi·1 hr 58 min·US 77
29
Turn right onto US 77; US 90 Alt
0.3 mi·20 sec·West 4th Street
30
Continue on US 77; US 90 Alt
0.4 mi·29 sec·Fairwinds Street
31
Turn left onto US 77
45 mi·53 min·United States Highway 77
Use the straight / left lanes.
32
Turn left onto US 87
0.3 mi·30 sec·East Goodwin Avenue
Use the left lane.
33
Continue on US 87
21 mi·25 min·Port Lavaca Drive
34
Keep slight left at fork onto US 87
5.4 mi·7 min·US 87
35
Arrive at destination
US 87
Trip Plan
Given the 6-hour 28-minute duration and the turn-heavy nature of this 339.9-mile drive, starting early from Plano is your best bet to maximize daylight. While the $52 fuel cost is manageable, plan for at least one stop to break up the drive and refuel. Since this isn't a highway-heavy route, you'll have more opportunities to find local amenities, but be mindful of the time it takes to navigate through populated areas. A good strategy is to aim for a mid-drive stop around the 3-hour mark to stretch your legs before continuing to Port Lavaca.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 170 miles from Plano, TX, or about 3h 6m into the drive.
The longest continuous stretch on this route runs about 120.2 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 75 miles or 1h 21m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 170 miles or 3h 6m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 15m
Traffic, exits, and arrival timing usually matter more near Port Lavaca, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Plano, TX 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 Plano, TX
This is one driving day of about 339.9 miles and 6h 28m.
Your first comfortable stop window is around 75 miles from Plano, TX.
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 US 77 for about 120.2 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 25
5 decision points cluster between mile 0.6 and 19.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.6 mi into trip|~1m in|Central Expressway
Turn left onto Central Expressway
Lane positioning matters here
Use the left / straight lanes.
8
17.5 mi into trip|~19m in
Take the exit toward Downtown, Good-Latimer Expressway
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Exit 284C
Toward Downtown, Good-Latimer Expressway
6
18.4 mi into trip|~21m in|North Pearl Expressway
Turn left onto North Pearl Expressway
Lane positioning matters here
Use the straight lane.
9
19.7 mi into trip|~24m in
Keep slight left at fork toward I 35E North, I 35E South: Denton, Waco
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 35E North, I 35E South: Denton, Waco
7
19.7 mi into trip|~24m in
Keep slight left at fork toward I 35E South: Waco
Highway fork - watch signs carefully. Lane positioning matters here
Use the left / right lanes.
Toward I 35E South: Waco
Fuel & Cost
Regular Gas
$51.36 one way
$102.72 round trip
$3.84/gal25.4 MPG avg119 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$56.22
$112.43
premium
$4.54
$60.69
$121.37
diesel
$5.61
$75.05
$150.09
Estimated Tolls: $1.40
Central Expressway
(17.5 mi)$1.40
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
$51
Tolls
$1
Meals
$25–$50
Total
$78–$103
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 118.9 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $36 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
102
1
$35.69
$16.32
Efficient EV
85
0
$29.74
$13.60
EV Truck/SUV
136
1
$47.59
$21.75
Gas CO2
119 kg
EV CO2
40 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 21, 2026
Origin
Plano, TX
Late night
in Plano on Tuesday
Local time
5:38 AM
CDT
Current temp
56°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
SSW 5 mph62% chanceLive forecast
Special Weather Statement
Special Weather Statement issued April 20 at 8:23PM MDT by NWS El Paso Tx/Santa Teresa NM
Special Weather Statement
Special Weather Statement issued April 20 at 9:17PM CDT by NWS Austin/San Antonio TX
Destination
Port Lavaca, TX
Late night
in Port Lavaca on Tuesday
Local time
5:38 AM
CDT
Current temp
67°F
Chance Showers And Thunderstorms
E 13 mph37% chanceLive forecast
Special Weather Statement
Special Weather Statement issued April 20 at 8:23PM MDT by NWS El Paso Tx/Santa Teresa NM
Special Weather Statement
Special Weather Statement issued April 20 at 9:17PM CDT by NWS Austin/San Antonio TX
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
11 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 28m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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.
Waco Mammoth National Monument
National Monument
Standing as tall as 14 feet and weighing 20,000 pounds, Columbian mammoths roamed across what is present-day Texas thousands of years ago. Today, the fossil specimens represent the nation's first and...
5 mi from route
~14 min detour
Free
near mile 105.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Get ready for a turn-heavy local drive connecting Plano to Port Lavaca. With a 0% highway share, this route means you'll be interacting with local traffic and traffic signals for much of the 339.9 miles. There isn't a 'longest stretch' to highlight as the profile suggests constant engagement with the road. You'll experience a consistent mix of city and town driving, so be prepared for frequent adjustments in speed and direction throughout the 6-hour-plus journey.
83% highway — fuel and pacing are the main things to plan.
35 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 120.2 mi on US 77.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on US 77 and South R L Thornton Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.6 miles in near Central Expressway.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 25 significant decision points across 339.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 0.6 miles (Central Expressway): Lane positioning matters here; at 17.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 18.4 miles (North Pearl Expressway): Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Plano, TX and Port Lavaca, TX, road signs point toward Downtown, Denton, Waco, Dallas Zoo and Loop 396.
Plano is a city of 285,000 people (2020) in the Dallas-Fort Worth Metroplex region of Texas and is north of Dallas. It is home to the headquarters of several large corporations.
Doable as a same-day drive at 6h 28m. Total distance: 339.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 28m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 120.2 miles on US 77. The full list of main roads is in the Roads section above.
Expect about $1.40 in tolls one way, starting with Central Expressway. 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.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Port Lavaca, TX before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 0.6 miles (Central Expressway): Lane positioning matters here; at 17.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 18.4 miles (North Pearl Expressway): Lane positioning matters here.
Yes — Waco Mammoth National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.5 hours each way, a round trip means 12.9 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Port Lavaca, TX before the return drive.
