How far is Big Lake, TX from San Antonio, TX?
The driving distance from Big Lake, TX to San Antonio, TX is about 248.2 miles (399.4 km), with a travel time of about 03h 56m by car.
- The straight-line flight distance is about 215 miles (346 km).
- For a round trip, plan for roughly 07h 53m 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 03h 56m.
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 Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Big Lake and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Big Lake and San Antonio.
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1
Start on East 2nd Street
18 mi · 19 min · East 2nd Street
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2
Turn right onto Main Street
28.6 mi · 42 min · Main Street
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3
Continue on Avenue E
1 mi · 2 min · Avenue E
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4
Turn left onto 15th Street
1577 ft · 30 sec · 15th Street
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5
Take the ramp straight toward I 10 East: San Antonio
716 ft · 18 sec
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6
Merge slight left
184 mi · 2 hr 56 min
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7
Keep slight right
17.4 mi · 20 min
-
8
Keep slight right to continue on McDermott Freeway
1.7 mi · 2 min · McDermott Freeway
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9
Take the exit slight right toward Santa Rosa Street, Downtown
2505 ft · 1 min
-
10
Turn straight onto North Pecos-La Trinidad
804 ft · 16 sec · North Pecos-La Trinidad
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11
Keep slight right to continue on North Pecos-La Trinidad
2963 ft · 1 min · North Pecos-La Trinidad
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12
Turn left onto Dolorosa Street
2582 ft · 56 sec · Dolorosa Street
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13
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Big Lake and San Antonio.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 10 East
Merge slight left
184 mi · 02h 56m
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.
Sunny leaving Big Lake and Mostly Sunny near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Big Lake to San Antonio?
The road trip is about 248.2 miles (399.4 km) and usually takes 03h 56m 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?
Junction is a useful midpoint, sitting about 126.4 miles from Big Lake and 121.8 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 215 miles (346 km), while the road route adds roughly 33.2 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 9:06 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.10 one way or $66.21 round trip. Estimated CO2 is about 77.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Big Lake and Mostly Sunny near San Antonio.
Flight Path Map
This map shows the direct air route between Big Lake and San Antonio. Straight-line distance: 214.99 mi (346 km).
#1 Big Lake
City in Texas, USA
| Population | 3,348 |
| Coordinates | 31.1915400, -101.4603900 |
| Altitude | 820 |
| Country | United States |
#2 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 |
End: Dolorosa Street (-98.493645, 29.424163)
Estimated Travel Time
Distance: 399 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 16m |
| 40 mph (64.37 km/h) | 06h 12m |
| 50 mph (80.47 km/h) | 04h 57m |
| 60 mph (96.56 km/h) | 04h 08m |
| 70 mph (112.65 km/h) | 03h 32m |
| 80 mph (129 km/h) | 03h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $33.10 | $66.21 |
| Mid-grade | $4.25 | $37.25 | $74.50 |
| Premium | $4.59 | $40.22 | $80.43 |
| Diesel | $3.99 | $34.98 | $69.96 |
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 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.