Traveling from San Leon to Dallas covers 282.8 miles and typically takes about 4 hours and 29 minutes. Since this journey stays entirely within the Great Plains region of Texas, you can easily complete it in a single day without needing an overnight stay. Expect to spend approximately $42 on fuel for the trip. Because the route relies on local roads like Parke Street, Main Street, and Pine Street rather than major interstates, the pace is more deliberate. It is a straightforward trip for those who prefer avoiding heavy highway traffic, making it a manageable drive for a weekend getaway or a planned excursion.
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
139.2 miles from San Leon, TX
A natural place for your longest stop of the day
, about 2h 36m into the drive
.
Main Roads
Road
Distance
Duration
North Freeway
236.3 mi
4h 8m
South Gulf Freeway
28.6 mi
33m
FM 517
8.7 mi
14m
Pine Drive
1.4 mi
2m
Gulf Freeway Frontage Road
1 mi
1m
Elm Street
0.9 mi
1m
Pine Street
0.3 mi
<1m
Parke Street
0.3 mi
<1m
Longest stretch:
North Freeway
— 236.3 mi, about 4h 8m
Traffic on I-45
Hour-of-day weekday pattern from 24 FHWA count stations on your route.
Peak
4 PM
~3,256 veh/hr typical
· worst 3,806
Quietest
2 AM
~407 veh/hr
Peak-to-quiet ratio
8×
busier at peak than in the quiet hours
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Averaged across 48 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between San Leon, TX and Dallas, TX.
1
Start on Avenue I
165 ft·9 sec·Avenue I
2
Continue on FM 517
8.7 mi·14 min·FM 517
3
Turn left onto FM 517
0.3 mi·28 sec·Parke Street
4
Turn straight onto FM 517
446 ft·9 sec·Main Street
5
Continue on FM 517
0.3 mi·31 sec·Pine Street
6
Continue on FM 517
1.4 mi·2 min·Pine Drive
7
Turn right onto Gulf Freeway Frontage Road
1.0 mi·1 min·Gulf Freeway Frontage Road
8
Take the ramp
0.2 mi·25 sec
Toward I 45 NorthUse the slight left lane.
9
Merge onto I 45
29 mi·33 min·South Gulf Freeway
Use the straight / slight right lanes.
10
Continue on I 45
236 mi·4 hr 8 min·North Freeway
Use the straight / slight right lanes.
11
Take the exit
0.2 mi·31 sec
Exit 284BToward Main Street West, Elm StreetUse the straight / slight right lanes.
12
Keep slight right at fork
0.1 mi·14 sec
Toward Elm StreetUse the slight left / slight right lanes.
13
Turn straight onto Elm Street
0.9 mi·1 min·Elm Street
Use the straight / left / right lanes.
14
Turn right onto North Lamar Street
0.2 mi·30 sec·North Lamar Street
15
Arrive at destination
North Lamar Street
Trip Plan
To keep your drive smooth, plan for at least one stop to stretch your legs and break up the local navigation. Since the route is entirely composed of local roads, departing early in the morning can help you avoid local congestion and reach Dallas with less stress. Keep $42 set aside specifically for fuel to ensure you have enough to cover the full 282.8-mile distance. Because this is a turn-heavy route, ensure your GPS is updated and ready to handle frequent directional changes on Parke, Main, and Pine Streets. Flexibility is your biggest advantage here, so feel free to adjust your pace as you navigate the local road network.
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 139.2 miles from San Leon, TX, or about 2h 36m into the drive.
The longest continuous stretch on this route runs about 236.3 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 61 miles or 1h 14m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 139.2 miles or 2h 36m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 10m
Traffic, exits, and arrival timing usually matter more near Dallas, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving San Leon, 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 San Leon, TX
This is one driving day of about 278.3 miles and 5h 4m.
Your first comfortable stop window is around 61 miles from San Leon, 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 North Freeway for about 236.3 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 6
5 decision points cluster between mile 11.8 and 278.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
11.8 mi into trip|~19m in
Take the ramp toward I 45 North
Lane positioning matters here
Use the slight left lane.
Toward I 45 North
5
12 mi into trip|~19m in|I 45 / South Gulf Freeway
Merge onto I 45 / South Gulf Freeway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
8
276.9 mi into trip|~5h 1m in
Take the exit toward Main Street West, Elm Street
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 284B
Toward Main Street West, Elm Street
8
277.1 mi into trip|~5h 1m in
Keep slight right at fork toward Elm Street
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward Elm Street
4
278.1 mi into trip|~5h 3m in|North Lamar Street
Turn right onto North Lamar Street
Navigation decision point
Fuel & Cost
Regular Gas
$38.12 one way
$76.24 round trip
$3.48/gal25.4 MPG avg97 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$3.89
$42.58
$85.16
premium
$4.23
$46.29
$92.58
diesel
$4.80
$52.55
$105.10
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$38
Meals
$25–$50
Total
$63–$88
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 97.4 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $29 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
83.5
1
$29.22
$13.36
Efficient EV
69.6
0
$24.35
$11.13
EV Truck/SUV
111.3
1
$38.96
$17.81
Gas CO2
97 kg
EV CO2
33 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 Jul 18, 2026
Origin
San Leon, TX
Late night
in San Leon on Sunday
Local time
4:59 AM
CDT
Current temp
83°F
Mostly Cloudy
S 10 mph1% chanceLive forecast
Flash Flood Warning
Flash Flood Warning issued July 17 at 9:47PM CDT until July 18 at 7:00AM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued July 17 at 9:34PM CDT until July 19 at 9:45AM CDT by NWS Austin/San Antonio TX
Destination
Dallas, TX
Late night
in Dallas on Sunday
Local time
4:59 AM
CDT
Current temp
77°F
Mostly Cloudy
S 5 to 10 mph2% chanceLive forecast
Flash Flood Warning
Flash Flood Warning issued July 17 at 9:47PM CDT until July 18 at 7:00AM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued July 17 at 9:34PM CDT until July 19 at 9:45AM CDT by NWS Austin/San Antonio TX
96°F
Rhode Island, TX
139 mi in
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
6 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
5h 4m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
Expect a turn-heavy local drive that keeps you engaged behind the wheel. Unlike a monotonous interstate grind, this route avoids highways entirely, resulting in a 0% highway share. You will navigate through local streets, which means your longest uninterrupted stretch is 0 miles while traveling on Parke Street. The journey requires your full attention as you transition between local road segments. This is a technical drive that prioritizes navigation through town corridors over high-speed cruising, so prepare for a steady, hands-on experience for the duration of your 4-hour and 29-minute trek.
99% highway — fuel and pacing are the main things to plan.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 236.3 mi on North Freeway.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on North Freeway and South Gulf Freeway. There are only a few real navigation decisions along the way. The trickiest moment comes around 11.8 miles in.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 4m drive. You will face about 6 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 11.8 miles: Lane positioning matters here; at 12 miles (I 45 / South Gulf Freeway): Merge point - match speed before joining. Lane positioning matters here; at 276.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
475 ft5 ft
Total Climb
591 ft
Total Descent
168 ft
Highest Point
475 ft
~238.6 mi in
Elevation Range
470 ft
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
Dallas, with a population of more than 1.3 million residents, is the ninth largest city in the United States and the third largest in the state of Texas. It is an impressive melting pot of culture and character. Boasting high-end luxury hotels, innumerable fine dining spots, and one of the busiest airports in the world, Dallas maintains an upscale ethos reflected by an affluent population, world-class museums, and a shimmering modern skyline. Its history was marred by the infamous assassination of U.S. President John F. Kennedy, but there is more historic and contemporary heritage to be discovered in the city.
As a center of the oil and cotton industries in the late 1800s and early 1900s, Dallas was a classic American boom town and remains one of the fastest growing cities in the nation.
Top landmarks
•Dallas Museum of Art — art museum in Dallas, Texas
•Texas School Book Depository — building in Dallas, Texas, United States
•George W. Bush Presidential Center — Presidential library and museum for U.S. President George W. Bush, located in Da...
The longest stretch is about 236.3 miles on North Freeway. The full list of main roads is in the Roads section above.
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.
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 11.8 miles: Lane positioning matters here; at 12 miles (I 45 / South Gulf Freeway): Merge point - match speed before joining. Lane positioning matters here; at 276.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Not recommended in a single day. At 5.1 hours each way, a round trip means 10.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Dallas, TX before the return drive.
