This 145.6-mile drive from San Antonio, TX, to Killeen, TX, is a manageable one-day trip, taking approximately 2 hours and 45 minutes. You'll primarily be on the Purple Heart Trail and State Highway 195, with a portion on the North Pan Am Expressway, making for a mixed driving experience. With an estimated fuel cost of $22, this journey through the Great Plains region of Texas is an efficient option for a quick getaway or transit. The route is well-suited for a single day, allowing you to reach your destination without needing an overnight stop.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
72.8 miles from San Antonio, TX
A natural place for your longest stop of the day
, about 1h 22m into the drive
.
Step-by-step road directions between San Antonio, TX and Killeen, TX.
1
Start on Dolorosa Street
143 ft·4 sec·Dolorosa Street
2
Continue on West Market Street
0.4 mi·42 sec·West Market Street
3
Continue on East Market Street
0.4 mi·45 sec·East Market Street
4
Turn left
363 ft·13 sec
Use the left lane.
5
Turn straight onto East Commerce Street
216 ft·12 sec·East Commerce Street
6
Take the ramp
0.2 mi·28 sec
Toward US 281 North, I 37 North
7
Merge onto I 37; US 281
0.8 mi·55 sec·William J Bordelon Freeway
8
Take the exit
0.6 mi·1 min
Exit 142AToward I 35 North: AustinUse the slight right lane.
9
Merge onto I 35
8.2 mi·10 min·North Pan Am Expressway
Use the straight / slight right lanes.
10
Keep slight left at fork onto North Pan Am Expressway
7.4 mi·8 min·North Pan Am Expressway
Toward I 35: AustinUse the straight / slight right lanes.
11
Continue on I 35
12 mi·12 min·Purple Heart Trail
Use the straight / slight right lanes.
12
Continue on I 35
1.9 mi·2 min·Interstate Highway 35
Use the straight / slight right lanes.
13
Continue on I 35
48 mi·52 min·Purple Heart Trail
Use the straight / slight right lanes.
14
Keep slight right at fork onto I 35; US 290
29 mi·32 min·Purple Heart Trail
Use the straight / slight right lanes.
15
Take the exit
1.1 mi·2 min
Exit 266Toward TX 195 North: Florence, KilleenUse the straight / slight right lanes.
16
Keep slight right at fork
0.2 mi·21 sec
Toward TX 195 North: Florence, KilleenUse the slight left / slight right lanes.
17
Continue on North Interstate 35
0.3 mi·25 sec·North Interstate 35
18
Turn left onto TX 195
34 mi·38 min·State Highway 195
Use the left / straight lanes.
19
Turn slight right
263 ft·9 sec
Use the right lane.
20
Turn slight right onto US 190 Bus
0.9 mi·1 min·West Veterans Memorial Boulevard
Use the right lane.
21
Turn left
83 ft·8 sec
22
Turn right
74 ft·5 sec
23
Arrive at destination
Trip Plan
Given the relatively short 2-hour and 45-minute duration, this 145.6-mile trip offers plenty of flexibility. Consider departing in the morning to maximize your day at your destination or in Killeen. With only one recommended stop, you can easily manage your breaks. Keep an eye on your fuel, as the estimated cost is $22, and plan to refuel before you leave San Antonio or during your single planned stop to avoid any issues. A specific tip for this route is to be aware of potential traffic, especially on the Purple Heart Trail, as it can be a busy corridor.
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.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 72.8 miles from San Antonio, TX, or about 1h 22m into the drive.
The longest continuous stretch on this route runs about 89 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 32 miles or 38m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 72.8 miles or 1h 22m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 15m
Traffic, exits, and arrival timing usually matter more near Killeen, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving San Antonio, 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 San Antonio, TX
This is one driving day of about 145.6 miles and 2h 45m.
Your first comfortable stop window is around 32 miles from San Antonio, 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 Purple Heart Trail for about 89 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 14
5 decision points cluster between mile 0.9 and 110.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0.9 mi into trip|~1m in
Take the ramp toward US 281 North, I 37 North
Multiple destination signs - pick the right one
Toward US 281 North, I 37 North
7
1.9 mi into trip|~3m in
Take the exit toward I 35 North: Austin
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 142A
Toward I 35 North: Austin
7
10.7 mi into trip|~14m in|North Pan Am Expressway
Keep slight left at fork onto North Pan Am Expressway toward I 35: Austin
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 35: Austin
8
109 mi into trip|~2h 2m in
Take the exit toward TX 195 North: Florence, Killeen
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 266
Toward TX 195 North: Florence, Killeen
8
110.2 mi into trip|~2h 4m in
Keep slight right at fork toward TX 195 North: Florence, Killeen
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Toward TX 195 North: Florence, Killeen
Fuel & Cost
Regular Gas
$22.00 one way
$44.00 round trip
$3.84/gal25.4 MPG avg51 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$24.08
$48.16
premium
$4.54
$26.00
$51.99
diesel
$5.61
$32.15
$64.29
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$22
Meals
$25–$50
Total
$47–$72
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 50.9 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $15 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
43.7
0
$15.29
$6.99
Efficient EV
36.4
0
$12.74
$5.82
EV Truck/SUV
58.2
0
$20.38
$9.32
Gas CO2
51 kg
EV CO2
17 kg (67% 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.
Forecast as of Apr 18, 2026
Origin
San Antonio, TX
Morning
in San Antonio on Sunday
Local time
6:52 AM
CDT
Current temp
68°F
Mostly Cloudy
SSE 5 to 15 mph1% chanceLive forecast
Destination
Killeen, TX
Morning
in Killeen on Sunday
Local time
6:52 AM
CDT
Current temp
60°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
8 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
2h 45m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
San Antonio Missions National Historical Park
National Historical Park
Welcome to San Antonio Missions, a National Park Service site and the only UNESCO World Heritage Site in Texas. Each mission in the park is a center of community and has been since the early 1700s. Th...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a 'Mixed drive' profile for this 145.6-mile route. While 36% of your journey will be on highways, you'll also encounter state highways, offering a change of pace. The longest uninterrupted stretch you'll experience is 89 miles on the Purple Heart Trail, providing a substantial period of consistent travel. This route offers a blend of faster-paced highway sections and more varied road conditions as you progress from San Antonio to Killeen, keeping the driving engaging.
36% highway, the rest on surface roads — varied driving throughout.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 89 mi on Purple Heart Trail.
How Hard Is This Drive?
8/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.9 miles in.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 14 significant decision points across 145.6 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: at 0.9 miles: Multiple destination signs - pick the right one; at 1.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 10.7 miles (North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
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
Killeen is a city in the Central Hill Country of Texas. It is home to U.S. Army installation Fort Cavasos, one of the largest military bases in the world.
Doable as a same-day drive at 2h 45m. Total distance: 145.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
2h 45m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (36%). Some complex stretches to watch for.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 89 miles on Purple Heart Trail. The full list of main roads is in the Roads section above.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Killeen, TX before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 0.9 miles: Multiple destination signs - pick the right one; at 1.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 10.7 miles (North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — San Antonio Missions National Historical Park. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Killeen, TX before heading back.
