Trip from Houston, TX to Mercedes, TX

Drive Time

6h 28m

Distance

340.2 mi

547 km

Drive Score

8/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$52

one way

EV Charging

station data

Best Time to Leave

Save up to 37 min

4 AM

6h 16m ★

6 AM

6h 29m

8 AM

6h 53m

10 AM

6h 37m

12 PM

6h 35m

3 PM

6h 38m

5 PM

6h 52m

8 PM

6h 21m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly

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Houston, TX

Trace Hudson

Mercedes, TX

Pixabay

Trip Overview

Traveling from Houston to Mercedes covers 340.2 miles of Texas landscape, typically requiring about 6 hours and 28 minutes of drive time. This route is best suited for a single-day trip, as it stays entirely within the Great Plains region of Texas. You should budget approximately $51 for fuel to complete the journey. Navigating out of Houston involves using Congress Street, Smith Street, and the Southwest Freeway. Because this is a turn-heavy local drive rather than a straight interstate shot, you should be prepared for a more active driving experience than a typical highway cruise.

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

170.1 miles from Houston, TX

A natural place for your longest stop of the day , about 3h 18m into the drive .

Drive Character

Expect a turn-heavy local drive rather than a monotonous interstate grind, as this route features a 0% highway share. Your journey begins with short, urban segments, including a notable lack of long uninterrupted stretches on Congress Street. Because the longest stretch on that road is 0 miles, you will find yourself navigating frequent turns and transitions throughout the trip. This profile demands your full attention, as the character of the road stays consistent with local driving conditions rather than high-speed motorway travel. Keep in mind that the road requires consistent engagement behind the wheel for the duration of the 340.2-mile trek.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.

There are about 28 navigation steps in the underlying route data, so the final approach matters more than the middle miles.

U.S. Highway 77 is the longest continuous segment at about 90.7 miles.

How Hard Is This Drive?

This is a straightforward highway drive that stays mostly on U.S. Highway 77 and US Highway 59. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near Congress Street.

Route Complexity 10/10

High effort - long or complex enough to need steady focus all day

This is a demanding drive. With 18 significant decision points across 340.2 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: near the start (Congress Street): Lane positioning matters here; at 35.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 204.5 miles (I 69E; US 77): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.

Critical Maneuvers

5 of 18 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

0 mi into trip | ~0m in | Congress Street

Turn left onto Congress Street

Lane positioning matters here

Use the left / straight lanes.

35.6 mi into trip | ~44m in

Take the exit toward Spur 10: Cottonwood, Church Road, Hartledge Road

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Exit 94 Toward Spur 10: Cottonwood, Church Road, Hartle...

204.5 mi into trip | ~3h 58m in | I 69E; US 77

Take the exit onto I 69E; US 77 toward I 69E, US 77: Kingsville, Brownsville

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. Toward I 69E, US 77: Kingsville, Brownsville

326.5 mi into trip | ~6h 12m in

Take the exit toward I 2 West, US 83: McAllen

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 26B Toward I 2 West, US 83: McAllen

338.6 mi into trip | ~6h 25m in

Take the exit toward FM 491: Texas Avenue

Exit ramp - move to the correct lane early. Lane positioning matters here

Use the slight right lane. Exit 163B Toward FM 491: Texas Avenue

Towns Along This Route

Between Houston, TX and Mercedes, TX, road signs point toward Spur 10: Cottonwood and Brownsville.

Spur 10: Cottonwood

35.6 mi in | ~44m

Brownsville

204.5 mi in | ~3h 58m | via I 69E; US 77

Main Roads

Road	Distance	Duration
U.S. Highway 77	90.7 mi	1h 39m
US Highway 59	74.7 mi	1h 22m
Alamo Street	37.1 mi	43m
US Highway 77 South	33.2 mi	37m
Southwest Freeway	32.8 mi	37m
I 69E	31.3 mi	33m
US 59	15.8 mi	18m
I 2	11 mi	11m

Longest stretch: U.S. Highway 77 — 90.7 mi, about 1h 39m

Turn-by-Turn Driving Directions

Step-by-step road directions between Houston, TX and Mercedes, TX.

Start on Louisiana Street

148 ft · 11 sec · Louisiana Street

Turn left onto Congress Street

298 ft · 14 sec · Congress Street

Use the left / straight lanes.

Turn left onto Smith Street

2.7 mi · 5 min · Smith Street

Use the left lane.

Merge onto I 69; US 59

33 mi · 37 min · Southwest Freeway

Use the straight / slight right lanes.

Take the exit

0.2 mi · 28 sec

Exit 94 Toward Spur 10: Cottonwood, Church Road, Hartledge Road

Turn straight onto Southwest Freeway Frontage Road

1.0 mi · 1 min · Southwest Freeway Frontage Road

Continue on Southwest Freeway Frontage Road

0.4 mi · 1 min · Southwest Freeway Frontage Road

Continue on US 59 Southbound Frontage Road

0.9 mi · 2 min · US 59 Southbound Frontage Road

Take the ramp

0.2 mi · 25 sec

Merge onto US 59

9.2 mi · 10 min · US 59

Keep slight left at fork onto US 59

6.6 mi · 7 min · US 59

Take the exit

1.5 mi · 2 min

Continue on US 59

75 mi · 1 hr 22 min · US Highway 59

Keep slight left at fork onto Spur 91

1.0 mi · 1 min · Spur 91

Merge onto US 77

33 mi · 37 min · US Highway 77 South

Turn straight onto US 77

37 mi · 43 min · Alamo Street

Take the exit onto US 77

0.1 mi · 13 sec · US 77

Toward I 37, US 77, I 69E

Keep slight left at fork

0.4 mi · 47 sec

Merge onto I 37; US 77; I 69E

2.5 mi · 2 min · I 37; US 77; I 69E

Use the straight lane.

Take the exit onto I 69E; US 77

31 mi · 33 min · I 69E; US 77

Toward I 69E, US 77: Kingsville, Brownsville Use the straight / slight right lanes.

Keep slight left at fork onto US 77

61 mi · 1 hr 9 min · U.S. Highway 77

Keep slight left at fork onto I 69E; US 77

29 mi · 30 min · U.S. Highway 77

Use the straight / slight right lanes.

Take the exit

1.0 mi · 1 min

Exit 26B Toward I 2 West, US 83: McAllen Use the straight / slight right lanes.

Continue on I 2; US 83

11 mi · 11 min · I 2; US 83

Use the straight / slight right lanes.

Take the exit

0.3 mi · 38 sec

Exit 163B Toward FM 491: Texas Avenue Use the slight right lane.

Turn straight onto East Expressway 83

0.8 mi · 1 min · East Expressway 83

Turn left onto FM 491

0.5 mi · 55 sec · North Texas Avenue

Arrive at destination

South Texas Avenue

Trip Plan

Since this is a 6 hour and 28 minute drive, plan for at least one dedicated stop to stretch your legs and refuel. With a total fuel cost of $51, it is wise to monitor your consumption as you navigate local roads where stop-and-go traffic can impact efficiency. Leaving early in the morning is your best bet to manage the turn-heavy nature of the route before daylight begins to fade. Because this trip is manageable in a single day, you have the flexibility to adjust your departure to avoid peak local traffic congestion. Always keep your navigation apps handy, as the reliance on local streets means you will encounter more intersections than a standard highway route.

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 170.1 miles from Houston, TX, or about 3h 18m into the drive.

The longest continuous stretch on this route runs about 90.7 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 80 miles or 1h 37m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 170.1 miles or 3h 18m 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 22m

Traffic, exits, and arrival timing usually matter more near Mercedes, TX than in the middle of the route.

Before You Leave

Open the route before leaving Houston, 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 Houston, TX

This is one driving day of about 340.2 miles and 6h 28m.

Your first comfortable stop window is around 80 miles from Houston, 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 U.S. Highway 77 for about 90.7 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 170.1 mi from Houston, TX · 3h 18m into the drive

Mid-route town

Meal stop

Corpus Christi, TX

170 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

Rosenberg, TX

Fuel and coffee

A short stop after about 80 miles helps settle the day before fatigue starts building.

Corpus Christi, TX

Meal break

The midpoint is around 170.1 miles from Houston, TX, which is a good place for a longer meal and fuel stop.

Before the longest stretch

Fuel check

Top up before U.S. Highway 77 if your tank is already low. That segment runs about 90.7 miles.

Arriving in Mercedes, TX

The final approach into Mercedes, TX usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Mercedes, TX.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

Fuel & Cost

Regular Gas

$51.97 one way

$103.94 round trip

$3.88/gal 25.4 MPG avg 119 kg CO₂

Fuel Type	$/gal	One Way	Round Trip
midgrade	$4.25	$56.95	$113.90
premium	$4.59	$61.49	$122.98
diesel	$5.64	$75.58	$151.16

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$52

Meals

$25–$50

Total

$77–$102

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 119 kg one way. Prices: EIA weekly data, 2026-04-06.

Driving Electric?

About $36 in charging · 1 stop · 66% less CO₂

Vehicle Type	kWh	Stops	DC Fast	Home Charge
Average EV	102.1	1	$35.72	$16.33
Efficient EV	85.1	0	$29.77	$13.61
EV Truck/SUV	136.1	1	$47.63	$21.77

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 data refreshed 3 days ago

Origin

Houston, TX

Afternoon in Houston on Sunday

Local time

4:12 PM

CDT

Current temp

70°F

Unavailable

Live forecast

Destination

Mercedes, TX

Afternoon in Mercedes on Sunday

Local time

4:12 PM

CDT

Current temp

72°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

2 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.

Frequently Asked Questions

The drive from Houston, TX to Mercedes, TX covers 340.2 miles and takes about 6h 28m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.

The main roads are U.S. Highway 77, US Highway 59, Alamo Street. Most of the drive stays on highways, so watch for ramps and exits.

This is a comfortable same-day trip.

The midpoint is about 170.1 miles from Houston, TX. Look for rest areas, gas stations, or food options near the halfway mark.

At current regular gas prices, expect to spend about $51.97 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.

Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.

Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.

Between Houston, TX and Mercedes, TX, road signs point toward Spur 10: Cottonwood and Brownsville.

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Return Trip

Mercedes, TX to Houston, TX

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341.1 mi 6h 49m

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Trip from Houston, TX to Mercedes, TX

Best Time to Leave

Trip Overview

Drive Character

How Hard Is This Drive?

Critical Maneuvers

Towns Along This Route

Main Roads

Turn-by-Turn Driving Directions

Trip Plan

Before You Leave

Where to Stop

Pacing Suggestions

Arriving in Mercedes, TX

Fuel & Cost

Travel Intel

Houston, TX

Mercedes, TX

Same local time

2 degrees warmer at arrival

6h 28m on the road

Frequently Asked Questions

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