Origin
Somerset, TX
Afternoon in Somerset on Sunday
Local time
4:56 PM
CDT
Current temp
84°F
Unavailable
Live forecast
Trip from Somerset, TX to San Antonio, TX
Drive Time
24m
Distance
19.5 mi
31 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
0h 23m
★
6 AM
0h 25m
8 AM
0h 29m
10 AM
0h 26m
12 PM
0h 26m
3 PM
0h 26m
5 PM
0h 29m
8 PM
0h 24m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Somerset, TX
Jeff Stapleton
San Antonio, TX
Wikimedia Commons
Trip Overview
If you are looking to get from Somerset to San Antonio, you are in for a quick, straightforward journey of just 19.6 miles. This short trip typically takes about 23 minutes behind the wheel, making it a perfect candidate for a single-day excursion. You won't need to budget much for your commute, as the estimated fuel cost is only $3. Because both locations are situated within the Great Plains region of Texas, you will find the landscape remains consistent throughout your travel. Given the brief duration, there is no need to plan for an overnight stay; it is a simple run that offers maximum flexibility for your schedule.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
0 planned breaks
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
9.8 miles from Somerset, TX
A natural place for your longest stop of the day , about 12m into the drive .
Drive Character
Expect a turn-heavy local drive as you navigate your way between these two points. Unlike a monotonous interstate grind, this route relies entirely on local roads, meaning there is zero highway share to speak of. You will stay off the major freeways, resulting in a more hands-on experience behind the wheel. The lack of long, uninterrupted stretches means you should stay attentive to the frequent turns along the path. It is a practical, no-frills route that focuses on local connectivity rather than high-speed cruising.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 14 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
South Pan Am Expressway is the longest continuous segment at about 9.9 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 8 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive near FM 2790 / Somerset Road.
Route Complexity
6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
This drive requires moderate attention. Across 19.5 miles you will encounter 8 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: near the start (FM 2790 / Somerset Road): Navigation decision point; at 4.1 miles: Navigation decision point; at 4.4 miles (I 35 / Purple Heart Trail): Merge point - match speed before joining. Lane positioning matters here.
Critical Maneuvers
5 of 8 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0 mi into trip
|
~0m in
|
FM 2790 / Somerset Road
Turn left onto FM 2790 / Somerset Road
Navigation decision point
4
4.1 mi into trip
|
~5m in
Take the ramp toward I 35 North
Navigation decision point
Toward I 35 North
5
4.4 mi into trip
|
~6m in
|
I 35 / Purple Heart Trail
Merge onto I 35 / Purple Heart Trail
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
4
17.7 mi into trip
|
~21m in
|
I 35 / South Pan Am Expressway
Keep slight left at fork onto I 35 / South Pan Am Expressway
Highway fork - watch signs carefully
7
18.3 mi into trip
|
~22m in
Take the exit toward Spur 536: South Alamo Street
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 155A
Toward Spur 536: South Alamo Street
Main Roads
| Road | Distance | Duration |
|---|---|---|
| South Pan Am Expressway | 9.9 mi | 11m |
| Purple Heart Trail | 4 mi | 4m |
| Anderson Loop | 2.8 mi | 3m |
| South TX 1604 Loop West | 0.6 mi | <1m |
| South Santa Rosa Street | 0.5 mi | <1m |
| Somerset Road | 0.4 mi | <1m |
| South Laredo Street | 0.4 mi | <1m |
| Dolorosa Street | 0.3 mi | <1m |
Longest stretch:
South Pan Am Expressway
— 9.9 mi, about 11m
Turn-by-Turn Driving Directions
Step-by-step road directions between Somerset, TX and San Antonio, TX.
1
Start on K Street
61 ft
·
8 sec
·
K Street
2
Turn left onto FM 2790
0.4 mi
·
52 sec
·
Somerset Road
3
Turn left onto Loop 1604
0.6 mi
·
49 sec
·
South TX 1604 Loop West
4
Continue on Loop 1604
2.8 mi
·
3 min
·
Anderson Loop
5
Turn right onto Interstate 35 South
0.2 mi
·
27 sec
·
Interstate 35 South
6
Take the ramp
0.2 mi
·
26 sec
Toward I 35 North
7
Merge onto I 35
4.0 mi
·
4 min
·
Purple Heart Trail
Use the straight / slight right lanes.
8
Continue on I 35
9.3 mi
·
11 min
·
South Pan Am Expressway
Use the straight / slight left lanes.
9
Keep slight left at fork onto I 35
0.5 mi
·
40 sec
·
South Pan Am Expressway
10
Take the exit
0.1 mi
·
15 sec
Exit 155A
Toward Spur 536: South Alamo Street
Use the straight / slight right lanes.
11
Turn straight onto South Laredo Street
0.4 mi
·
45 sec
·
South Laredo Street
Use the straight / left lanes.
12
Continue on South Santa Rosa Street
0.5 mi
·
51 sec
·
South Santa Rosa Street
13
Turn right onto Dolorosa Street
0.3 mi
·
32 sec
·
Dolorosa Street
14
Arrive at destination
Dolorosa Street
Trip Plan
Since this is a short, 23-minute trip, you have the advantage of being able to leave whenever it suits your plans without worrying about fatigue. You do not need to factor in any planned stops, as the distance is short enough to drive in one go. Keep in mind that because you are sticking to local roads, traffic patterns can shift quickly, so check your GPS for real-time updates before you head out. Your fuel budget of $3 is minimal, so you can easily fill up at either end of the trip without stress. Use this flexibility to time your departure around the local commute hours to ensure the smoothest possible experience.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 9.8 miles from Somerset, TX, or about 12m into the drive.
The longest continuous stretch on this route runs about 9.9 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 19.5 miles or 24m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 9.8 miles or 12m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 20m
Traffic, exits, and arrival timing usually matter more near San Antonio, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Somerset, 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 Somerset, TX
This is one driving day of about 19.5 miles and 24m.
Your first comfortable stop window is around 80 miles from Somerset, TX.
This route can stay practical as a one-day drive if traffic stays reasonable.
You may only need one short stretch stop if conditions stay smooth.
The longest stretch is on South Pan Am Expressway for about 9.9 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 9.8 mi from Somerset, TX · 12m into the drive
Mid-route town
Meal stop
10 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
Fuel and coffee
A short stop after about 19.5 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 9.8 miles from Somerset, TX, which is a good place for a longer meal and fuel stop.
Arriving in San Antonio, TX
The final approach into San Antonio, 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 San Antonio, 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
$2.98 one way
$5.96 round trip
$3.88/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $3.26 | $6.53 |
| premium | $4.59 | $3.52 | $7.05 |
| diesel | $5.64 | $4.33 | $8.66 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$3
Meals
$25–$50
Total
$28–$53
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 6.8 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 5.9 | 0 | $2.05 | $0.94 |
| Efficient EV | 4.9 | 0 | $1.71 | $0.78 |
| EV Truck/SUV | 7.8 | 0 | $2.73 | $1.25 |
Gas CO2
7 kg
EV CO2
2 kg (71% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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.
Destination
San Antonio, TX
Afternoon in San Antonio on Sunday
Local time
4:56 PM
CDT
Current temp
81°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
3 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
24m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Somerset, TX to San Antonio, TX covers 19.5 miles and takes about 24m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are South Pan Am Expressway, Purple Heart Trail, Anderson Loop. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 9.8 miles from Somerset, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $2.98 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This drive requires moderate attention. Across 19.5 miles you will encounter 8 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: near the start (FM 2790 / Somerset Road): Navigation decision point; at 4.1 miles: Navigation decision point; at 4.4 miles (I 35 / Purple Heart Trail): Merge point - match speed before joining. Lane positioning matters here.
The route from Somerset, TX to San Antonio, TX does not surface many named destination signs beyond the main corridor.
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