This 357.1-mile journey from Port Lavaca, TX to McKinney, TX is estimated to take around 6 hours and 6 minutes of driving time, making it a manageable one-day trip. You'll primarily be on local roads, indicated by a 0% highway share, suggesting a more varied and potentially slower pace. The estimated fuel cost for this route is $55. Given the duration and the turn-heavy nature of the drive, it's well-suited for a single day, allowing you to reach your destination without needing an overnight stop. Both your origin and destination are within the Great Plains region, so expect a consistent landscape throughout your travels in Texas.
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
176.8 miles from Port Lavaca, TX
A natural place for your longest stop of the day
, about 3h 29m into the drive
.
Main Roads
Road
Distance
Duration
I 35E
56.2 mi
58m
US 77
48.6 mi
55m
North Travis Avenue
48.6 mi
55m
South Main Street
48 mi
57m
Purple Heart Trail
33 mi
33m
North Central Expressway
26.6 mi
28m
United States Highway 77
24.9 mi
28m
US 87
20.9 mi
24m
Longest stretch:
I 35E
— 56.2 mi, about 58m
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Lavaca, TX and McKinney, TX.
1
Start on US 87
6.1 mi·7 min·East Main Street
2
Turn straight onto US 87
21 mi·24 min·US 87
3
Turn right onto US 87
6.5 mi·10 min·North Navarro Street
Use the straight / left lanes.
4
Continue on US 77
38 mi·43 min·US 77
5
At end of road, turn right onto US 77; US 90 Alt
0.4 mi·26 sec·Fairwinds Street
6
Continue on US 77; US 90 Alt
0.3 mi·25 sec·West 4th Street
7
Turn left onto US 77
1.4 mi·1 min·North Texana Street
8
Continue on US 77
0.2 mi·14 sec·United States Highway 77
9
Continue on US 77
6.8 mi·7 min·US 77
10
Continue on US 77; FM 532
25 mi·28 min·United States Highway 77
11
Continue on US 77
2.7 mi·3 min·South Jefferson Street
12
Continue on US 77
17 mi·19 min·North US Highway 77
13
Continue on US 77
48 mi·57 min·South Main Street
14
At end of road, turn left onto US 77; US 190; TX 36
3.6 mi·4 min·US 77; US 190; TX 36
15
Turn right onto US 77
49 mi·55 min·North Travis Avenue
Use the right lane.
16
Enter roundabout onto Circle Road
215 ft·11 sec·Circle Road
17
Continue on Circle Road
0.4 mi·54 sec·Circle Road
18
Turn straight onto South Jack Kultgen Expressway
0.5 mi·58 sec·South Jack Kultgen Expressway
19
Take the ramp
444 ft·10 sec
Toward I 35 North, US 77 North
20
Continue on US 77
0.3 mi·34 sec·US 77
21
Merge onto I 35; US 77
3.3 mi·3 min·South Jack Kultgen Expressway
Use the straight / slight right lanes.
22
Continue on I 35; US 77
33 mi·33 min·Purple Heart Trail
Use the straight / slight right lanes.
23
Keep slight right at fork onto I 35E
56 mi·58 min·I 35E
Toward I 35E: DallasUse the slight right lane.
24
Take the exit
0.4 mi·41 sec
Exit 427AToward I 30 East: Texarkana, Riverfront Boulevard, Griffin StreetUse the slight right lane.
25
Keep slight left at fork
422 ft·5 sec
Toward I 35E North, I 30 West: Denton, Fort Worth, Texarkana
26
Keep slight right at fork
0.4 mi·32 sec
Toward I 30 East: Texarkana, Convention Center
27
Keep slight left at fork
385 ft·6 sec
Toward I 30 East: Texarkana
28
Continue on I 30; US 67
0.8 mi·1 min·East R L Thornton Freeway
29
Take the exit
0.5 mi·45 sec
Exit 46Toward I 45, US 75: Houston, McKinneyUse the slight right lane.
30
Keep slight left at fork
0.5 mi·1 min
Toward US 75 North: McKinneyUse the slight left lane.
31
Keep slight right at fork
0.3 mi·26 sec
Toward US 75 North: McKinney, Bryan Street East
32
Merge onto US 75
0.7 mi·49 sec·Julius Schepps Freeway
Use the straight / slight right lanes.
33
Continue on US 75
27 mi·28 min·North Central Expressway
Use the straight / right lanes.
34
Take the exit
0.3 mi·21 sec
Exit 38CToward SRT South, TX 5: Sam Rayburn TollwayUse the straight / slight right lanes.
35
Keep slight right at fork
0.7 mi·1 min
Use the slight right lane.
36
Merge onto Spur 399
0.9 mi·1 min·Spur 399
37
Continue on TX 5
1.0 mi·1 min·South McDonald Street
38
Turn slight left
281 ft·10 sec
39
Continue on South Tennessee Street
1.1 mi·2 min·South Tennessee Street
40
Arrive at destination
North Tennessee Street
Trip Plan
For this 6-hour, 357.1-mile drive from Port Lavaca to McKinney, a morning departure is your best bet to arrive with ample daylight. Since it's a single-day trip with a $55 fuel cost, plan for one fuel stop midway to ensure you don't have to worry about running low. The 'turn-heavy local drive' profile means you should keep your navigation system handy and be prepared for frequent adjustments. Consider packing snacks and drinks, as the local road nature might mean fewer convenient rest areas compared to interstate travel. A concrete tip: pay close attention to the posted speed limits on local roads, as they can change frequently and unexpectedly.
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 176.8 miles from Port Lavaca, TX, or about 3h 29m into the drive.
The longest continuous stretch on this route runs about 56.2 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 78 miles or 1h 33m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 176.8 miles or 3h 29m 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 36m
Traffic, exits, and arrival timing usually matter more near McKinney, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Port Lavaca, 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 Port Lavaca, TX
This is one driving day of about 353.6 miles and 6h 44m.
Your first comfortable stop window is around 78 miles from Port Lavaca, 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 I 35E for about 56.2 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 20
5 decision points cluster between mile 263 and 349.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
263 mi into trip|~5h 4m in|I 35E
Keep slight right at fork onto I 35E toward I 35E: Dallas
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 35E: Dallas
8
319.2 mi into trip|~6h 3m in
Take the exit toward I 30 East: Texarkana, Riverfront Boulevard, Griffin Street
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 427A
Toward I 30 East: Texarkana, Riverfront Bouleva...
8
320.9 mi into trip|~6h 5m in
Take the exit toward I 45, US 75: Houston, McKinney
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 46
Toward I 45, US 75: Houston, McKinney
7
321.3 mi into trip|~6h 6m in
Keep slight left at fork toward US 75 North: McKinney
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left lane.
Toward US 75 North: McKinney
8
349.5 mi into trip|~6h 37m in
Take the exit toward SRT South, TX 5: Sam Rayburn Tollway
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 38C
Toward SRT South, TX 5: Sam Rayburn Tollway
Fuel & Cost
Regular Gas
$53.43 one way
$106.86 round trip
$3.84/gal25.4 MPG avg124 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$58.48
$116.97
premium
$4.54
$63.13
$126.27
diesel
$5.61
$78.07
$156.14
Estimated Tolls: $2.13
Central Expressway
(26.6 mi)$2.13
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
$53
Tolls
$2
Meals
$25–$50
Total
$81–$106
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 123.7 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $37 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
106.1
1
$37.13
$16.97
Efficient EV
88.4
1
$30.94
$14.14
EV Truck/SUV
141.4
1
$49.50
$22.63
Gas CO2
124 kg
EV CO2
41 kg (67% 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 15, 2026
Origin
Port Lavaca, TX
Morning
in Port Lavaca on Sunday
Local time
11:30 AM
CDT
Current temp
69°F
Unavailable
Live forecast
Destination
McKinney, TX
Morning
in McKinney on Sunday
Local time
11:30 AM
CDT
Current temp
59°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
10 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
6h 44m 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...
4 mi from route
~11 min detour
Free
near mile 231.7
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a 'turn-heavy local drive' for the entirety of this 357.1-mile route. With no highway driving involved, you'll be navigating local streets like North Navarro Street, Fairwinds Street, and West 4th Street for the majority of your journey. This means frequent turns and varying speed limits, so staying attentive is key. While there's no specific data on the longest uninterrupted stretch, the profile suggests a continuous series of local road segments rather than long, open highway stretches. This type of drive offers a more intimate feel of the towns and communities you pass through.
57% highway, the rest on surface roads — varied driving throughout.
40 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 56.2 mi on I 35E.
How Hard Is This Drive?
9/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 263 miles in near I 35E.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 20 significant decision points across 353.6 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 263 miles (I 35E): Highway fork - watch signs carefully. Lane positioning matters here; at 319.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 320.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Port Lavaca, TX and McKinney, TX, road signs point toward Fort Worth, Texarkana, Convention Center and Bryan Street East.
Doable as a same-day drive at 6h 44m. Total distance: 353.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 44m drive, plan rest stops for pacing.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 56.2 miles on I 35E. The full list of main roads is in the Roads section above.
Expect about $2.13 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 McKinney, 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 263 miles (I 35E): Highway fork - watch signs carefully. Lane positioning matters here; at 319.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 320.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Waco Mammoth National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.7 hours each way, a round trip means 13.5 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at McKinney, TX before the return drive.
