Origin
San Antonio, TX
Late night in San Antonio on Sunday
Local time
4:58 AM
CDT
Current temp
77°F
Unavailable
Live forecast
Trip from San Antonio, TX to Somerset, TX
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
26m
Distance
20.2 mi
32 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 24m
★
6 AM
0h 27m
8 AM
0h 31m
10 AM
0h 28m
12 PM
0h 28m
3 PM
0h 28m
5 PM
0h 31m
8 PM
0h 25m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
San Antonio, TX
Wikimedia Commons
Somerset, TX
Wikimedia Commons
Trip Overview
If you are planning a quick excursion from San Antonio to Somerset, you will cover a short 20.2-mile distance. Expect to spend about 26 minutes behind the wheel, making this a perfect candidate for a simple day trip that requires no overnight stay. You will navigate primarily through local streets like West Market, Navarro, and East Commerce rather than cruising on high-speed interstates. With a fuel budget of roughly $3, it is an incredibly economical trek within the Great Plains region. Both your starting point and destination sit firmly in the Texas Great Plains, keeping the landscape consistent throughout your journey. This route is straightforward and ideal if you prefer local roads over highway driving.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| South Pan Am Expressway | 10 mi | 11m |
| Purple Heart Trail | 4 mi | 4m |
| Anderson Loop | 3 mi | 3m |
| South TX 1604 Loop West | 0.6 mi | <1m |
| South Santa Rosa Street | 0.5 mi | 1m |
| East Commerce Street | 0.5 mi | 1m |
| Somerset Road | 0.4 mi | <1m |
| West Market Street | 0.2 mi | <1m |
Longest stretch:
South Pan Am Expressway
— 10 mi, about 11m
Turn-by-Turn Driving Directions
Step-by-step road directions between San Antonio, TX and Somerset, TX.
1
Start on Dolorosa Street
143 ft
·
4 sec
·
Dolorosa Street
2
Continue on West Market Street
0.2 mi
·
28 sec
·
West Market Street
3
Turn left onto Navarro Street
250 ft
·
12 sec
·
Navarro Street
4
Turn left onto East Commerce Street
0.5 mi
·
1 min
·
East Commerce Street
5
Turn left onto South Santa Rosa Street
0.5 mi
·
1 min
·
South Santa Rosa Street
6
Continue on South Laredo Street
494 ft
·
13 sec
·
South Laredo Street
7
Turn right onto Guadalupe Street
519 ft
·
17 sec
·
Guadalupe Street
8
Take the ramp
0.2 mi
·
26 sec
Toward I 35 South, I 10 East
9
Merge onto I 10; US 87
10 mi
·
11 min
·
South Pan Am Expressway
Toward I 10 East, US 87 South: Upper Level, Houston
Use the straight / slight right lanes.
10
Continue on I 35
4.0 mi
·
4 min
·
Purple Heart Trail
Use the straight / slight right lanes.
11
Take the exit
0.2 mi
·
31 sec
Exit 140
Toward Loop 1604: Somerset
Use the straight / slight right lanes.
12
Turn straight onto Interstate 35 South
0.2 mi
·
22 sec
·
Interstate 35 South
13
Turn left onto Loop 1604
3.0 mi
·
3 min
·
Anderson Loop
14
Continue on Loop 1604
0.6 mi
·
52 sec
·
South TX 1604 Loop West
15
Turn right onto FM 2790
0.4 mi
·
49 sec
·
Somerset Road
16
Turn right onto K Street
61 ft
·
1 sec
·
K Street
17
Arrive at destination
K Street
Heads-up: tricky spots
5 of 85 decision points cluster between mile 0.2 and 15.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.2 mi into trip
|
~0m in
|
Navarro Street
Turn left onto Navarro Street
Navigation decision point
4
0.3 mi into trip
|
~0m in
|
East Commerce Street
Turn left onto East Commerce Street
Navigation decision point
6
1.5 mi into trip
|
~3m in
Take the ramp toward I 35 South, I 10 East
Multiple destination signs - pick the right one
Toward I 35 South, I 10 East
7
1.7 mi into trip
|
~3m in
|
I 10; US 87 / South Pan Am Expressway
Merge onto I 10; US 87 / South Pan Am Expressway toward I 10 East, US 87 South: Upper Level, Houston
Merge point - match speed before joining. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 10 East, US 87 South: Upper Level, Hou...
7
15.7 mi into trip
|
~20m in
Take the exit toward Loop 1604: Somerset
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 140
Toward Loop 1604: Somerset
Fuel & Cost
Regular Gas
$3.05 one way
$6.10 round trip
$3.84/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.20 | $3.34 | $6.68 |
| premium | $4.54 | $3.61 | $7.21 |
| diesel | $5.61 | $4.46 | $8.92 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 7.1 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 6.1 | 0 | $2.12 | $0.97 |
| Efficient EV | 5.1 | 0 | $1.77 | $0.81 |
| EV Truck/SUV | 8.1 | 0 | $2.83 | $1.29 |
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
Somerset, TX
Late night in Somerset on Sunday
Local time
4:58 AM
CDT
Current temp
62°F
Unavailable
Live forecast
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
15 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
26m 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.
What kind of drive is this?
Expect a turn-heavy local drive that keeps you engaged from start to finish. Because this route involves zero highway miles, you will be navigating urban or suburban street grids rather than maintaining a steady pace on an open expressway. The character of the road is strictly local, demanding your full attention as you transition between West Market Street, Navarro Street, and East Commerce Street. Since there are no long, uninterrupted stretches of highway, the drive feels consistent and intimate rather than a high-speed sprint. You should prepare for frequent turns and a slower, more deliberate pace as you make your way toward Somerset.
54% highway, the rest on surface roads — varied driving throughout.
17 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 10 mi on South Pan Am Expressway.
How Hard Is This Drive?
5/10
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 around 0.2 miles in near Navarro Street.
Driving Effort
5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 20.2 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: at 0.2 miles (Navarro Street): Navigation decision point; at 0.3 miles (East Commerce Street): Navigation decision point; at 1.5 miles: Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between San Antonio, TX and Somerset, TX, road signs point toward Houston and Loop 1604: Somerset.
Houston
1.7 mi in
|
~3m
|
via I 10; US 87
Loop 1604: Somerset
15.7 mi in
|
~20m
About the Cities
Starting in San Antonio, TX
Full guide →Founded 1718
San Antonio is the second largest city in the state of Texas and the 7th largest in the United States. It's the 24th largest metropolitan area in the country. Visited by more than 31 million annual visitors, San Antonio is a beautiful city at the axis of three different geological terrains: Hill Country, South Texas Plains and Prairie and Lakes. There's a lot to do in this city: fine art museums, historical missions and plenty of amusement parks in addition to great dining and lots of drinking. The culture and people are vibrant and interesting. San Antonio's downtown is one of the most lively in the nation.
Top landmarks
- • Alamo Mission in San Antonio — historic place in San Antonio, Bexar County, Texas
- • San Antonio Missions National Historical Park — historic district in San Antonio, Bexar County, Texas
- • Fort Sam Houston — military base in San Antonio, Texas
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 26m. Total distance: 20.2 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
26m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (54%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 10 miles on South Pan Am Expressway. The full list of main roads is in the Roads section above.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: at 0.2 miles (Navarro Street): Navigation decision point; at 0.3 miles (East Commerce Street): Navigation decision point; at 1.5 miles: Multiple destination signs - pick the right one.
Yes. A round trip is manageable in a single day if you plan a break at Somerset, TX before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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