How far is San Antonio, TX from Harlingen, TX?
The driving distance from San Antonio, TX to Harlingen, TX is about 250.8 miles (403.6 km), with a travel time of about 04h 28m by car.
- The straight-line flight distance is about 228.7 miles (368 km).
- For a round trip, plan for roughly 08h 56m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 04h 28m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in San Patricio County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms
Partly Sunny
Driving Route Map
The map below follows the saved road route between San Antonio and Harlingen.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Antonio and Harlingen.
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1
Start on Dolorosa Street
44 m · 5 sec · Dolorosa Street
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2
Continue on West Market Street
1893 ft · 42 sec · West Market Street
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3
Continue on East Market Street
2143 ft · 41 sec · East Market Street
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4
Turn right onto Tower of the Americas Way
957 ft · 21 sec · Tower of the Americas Way
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5
Take the ramp slight left toward I 37 South, US 281 South
1374 ft · 34 sec
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6
Merge slight left onto William J Bordelon Freeway
1.4 mi · 2 min · William J Bordelon Freeway
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7
Continue on Lucian Adams Freeway
125.1 mi · 2 hr 7 min · Lucian Adams Freeway
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8
Take the exit slight right toward I 69E, US 77: Kingsville, Brownsville
31.3 mi · 34 min
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9
Keep slight left to continue on U.S. Highway 77
61.3 mi · 1 hr 9 min · U.S. Highway 77
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10
Keep slight left to continue on U.S. Highway 77
26.9 mi · 28 min · U.S. Highway 77
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11
Take the exit slight right toward US 77 Business, Loop 499: Valley International Airport, Primera Road
1443 ft · 31 sec
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12
At the end of the road, turn left onto Business 77
2200 ft · 45 sec · Business 77
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13
Turn slight right onto North 77 Sunshine Strip
1.3 km · 1 min · North 77 Sunshine Strip
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14
Turn slight right onto North Commerce Street
2.1 mi · 4 min · North Commerce Street
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15
Arrive at your destination
0 m · 1 sec · South Commerce Street
Car Route Details
A richer read on the saved driving route between San Antonio and Harlingen.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Lucian Adams Freeway
Continue on Lucian Adams Freeway
125 mi · 02h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Showers And Thunderstorms leaving San Antonio and Partly Sunny near Harlingen.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Antonio to Harlingen?
The road trip is about 250.8 miles (403.6 km) and usually takes 04h 28m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Odem is a useful midpoint, sitting about 125.7 miles from San Antonio and 125.1 miles from Harlingen.
How much longer is the road route than the straight-line distance?
The direct path is about 228.7 miles (368 km), while the road route adds roughly 22.1 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 8:04 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.44 one way or $66.89 round trip. Estimated CO2 is about 78.6 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around San Antonio and Partly Sunny near Harlingen.
Flight Path Map
This map shows the direct air route between San Antonio and Harlingen. Straight-line distance: 228.66 mi (368 km).
#1 San Antonio
The seventh most populous city in the United States and the center of the San Antonio metropolitan area.
| Population | 1,567,118 |
| Coordinates | 29.4241200, -98.4936300 |
| Altitude | 198 |
| Country | United States |
#2 Harlingen
The most populous city in Cameron County, Texas.
| Population | 65,176 |
| Coordinates | 26.1906300, -97.6961000 |
| Altitude | 12 |
| Country | United States |
End: Harlingen (-97.6961, 26.19063)
Estimated Travel Time
Distance: 404 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 21m |
| 40 mph (64.37 km/h) | 06h 16m |
| 50 mph (80.47 km/h) | 05h 00m |
| 60 mph (96.56 km/h) | 04h 10m |
| 70 mph (112.65 km/h) | 03h 34m |
| 80 mph (129 km/h) | 03h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $33.44 | $66.89 |
| Mid-grade | $4.25 | $37.63 | $75.26 |
| Premium | $4.59 | $40.63 | $81.26 |
| Diesel | $3.99 | $35.34 | $70.68 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Texas · May 02, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.