Origin
Killeen, TX
Night in Killeen on Wednesday
Local time
11:39 PM
CDT
Current temp
60°F
Unavailable
Live forecast
Trip from Killeen, TX to San Antonio, TX
Last recalculated Apr 16, 2026
Drive Time
2h 44m
Distance
145.5 mi
234 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$22
one way
Best Time to Leave
4 AM
2h 34m
★
6 AM
2h 44m
8 AM
3h 6m
10 AM
2h 52m
12 PM
2h 50m
3 PM
2h 53m
5 PM
3h 5m
8 PM
2h 38m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Killeen, TX
Wikimedia Commons
San Antonio, TX
Wikimedia Commons
Trip Overview
This 145.5-mile drive from Killeen to San Antonio, Texas, is easily managed as a single-day trip, taking approximately 2 hours and 44 minutes. You'll primarily navigate using the Purple Heart Trail and South Fort Hood Street before merging onto the North Pan Am Expressway. With a projected fuel cost of around $22, this route offers a straightforward journey through the Great Plains region. It's a practical option for a quick transition between these two Texas cities, requiring just one stop for breaks or fuel.
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 Killeen, TX
A natural place for your longest stop of the day , about 1h 21m into the drive .
Drive Character
Expect a turn-heavy local drive on this route, with only 13% of the journey on highways. The road character shifts from more localized streets to expressways, but it's not a constant interstate experience. You'll encounter your longest uninterrupted stretch on the Purple Heart Trail, covering 89.6 miles. This suggests a drive that balances faster sections with more frequent changes in direction and potentially lower speed limits as you pass through various communities.
This route has more turning and local-road decision points than a simple highway run.
There are about 26 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Purple Heart Trail is the longest continuous segment at about 89.6 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 63.9 miles in near I 35; US 290 / Purple Heart Trail.
Route Complexity
8/10
Demanding - plan breaks and stay ahead of the key maneuvers
This is a demanding drive. With 17 significant decision points across 145.5 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 63.9 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 137.4 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here; at 143.8 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 17 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
8
63.9 mi into trip
|
~1h 11m in
|
I 35; US 290 / Purple Heart Trail
Keep slight left at fork onto I 35; US 290 / Purple Heart Trail toward 32nd Street, Dean Keeton Street
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward 32nd Street, Dean Keeton Street
7
137.4 mi into trip
|
~2h 32m in
|
I 35 / North Pan Am Expressway
Keep slight left at fork onto I 35 / North Pan Am Expressway toward I 35 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 35 South
8
143.8 mi into trip
|
~2h 41m in
|
I 35 / North Pan Am Expressway
Keep slight left at fork onto I 35 / North Pan Am Expressway toward I 35 South: Lower Level, Laredo
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward I 35 South: Lower Level, Laredo
8
144.3 mi into trip
|
~2h 41m in
Take the exit toward Lexington Avenue, Main Avenue, San Pedro Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 157A
Toward Lexington Avenue, Main Avenue, San Pedro...
6
144.6 mi into trip
|
~2h 42m in
|
North Main Avenue
Turn left onto North Main Avenue
Lane positioning matters here
Use the left / straight lanes.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Purple Heart Trail | 89.6 mi | 1h 37m |
| South Fort Hood Street | 33.8 mi | 37m |
| North Pan Am Expressway | 17 mi | 20m |
| Interstate Highway 35 | 1.7 mi | 1m |
| East Veterans Memorial Boulevard | 0.9 mi | 1m |
| North Interstate 35 | 0.8 mi | 1m |
| North Main Avenue | 0.6 mi | 1m |
| North Flores Street | 0.2 mi | <1m |
Longest stretch:
Purple Heart Trail
— 89.6 mi, about 1h 37m
Turn-by-Turn Driving Directions
Step-by-step road directions between Killeen, TX and San Antonio, TX.
1
Start on this road
74 ft
·
10 sec
·
this road
2
Turn left
83 ft
·
8 sec
3
Turn right onto US 190 Bus
0.9 mi
·
1 min
·
East Veterans Memorial Boulevard
4
Turn left onto TX 195
34 mi
·
37 min
·
South Fort Hood Street
Use the straight / slight right lanes.
5
Take the exit
0.2 mi
·
17 sec
6
Continue on North Interstate 35
0.2 mi
·
16 sec
·
North Interstate 35
7
Continue on North Interstate 35
0.6 mi
·
46 sec
·
North Interstate 35
8
Take the ramp
0.4 mi
·
45 sec
Toward I 35 South: Austin
9
Merge onto I 35
28 mi
·
30 min
·
Purple Heart Trail
Use the straight / slight right lanes.
10
Keep slight left at fork onto I 35; US 290
50 mi
·
54 min
·
Purple Heart Trail
Toward 32nd Street, Dean Keeton Street
Use the slight left lane.
11
Continue on I 35
1.7 mi
·
1 min
·
Interstate Highway 35
Use the straight / slight right lanes.
12
Continue on I 35
12 mi
·
12 min
·
Purple Heart Trail
Use the straight / slight right lanes.
13
Continue on I 35
10.0 mi
·
11 min
·
North Pan Am Expressway
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 35
6.4 mi
·
8 min
·
North Pan Am Expressway
Toward I 35 South
Use the straight / slight right lanes.
15
Keep slight left at fork onto I 35
0.6 mi
·
41 sec
·
North Pan Am Expressway
Toward I 35 South: Lower Level, Laredo
Use the slight left lane.
16
Take the exit
0.1 mi
·
16 sec
Exit 157A
Toward Lexington Avenue, Main Avenue, San Pedro Avenue
Use the slight right lane.
17
Turn straight onto East Elmira Street
526 ft
·
17 sec
·
East Elmira Street
Use the left / straight lanes.
18
Turn left onto North Main Avenue
0.2 mi
·
18 sec
·
North Main Avenue
Use the left / straight lanes.
19
Enter roundabout onto Navarro Street
159 ft
·
3 sec
·
Navarro Street
20
Continue on Navarro Street
111 ft
·
2 sec
·
Navarro Street
21
Keep slight right at fork onto North Main Avenue
0.4 mi
·
51 sec
·
North Main Avenue
Use the slight left / slight right lanes.
22
Turn right onto West Travis Street
222 ft
·
10 sec
·
West Travis Street
23
Turn left onto North Flores Street
0.2 mi
·
20 sec
·
North Flores Street
24
Continue on Military Plaza
392 ft
·
15 sec
·
Military Plaza
25
Turn left onto Dolorosa Street
327 ft
·
8 sec
·
Dolorosa Street
26
Arrive at destination
Dolorosa Street
Trip Plan
Given the relatively short 2-hour and 44-minute duration, this trip offers flexibility for departure times. Leaving Killeen in the morning allows for a relaxed arrival in San Antonio with plenty of the day remaining. While the drive is manageable without overnight stays, plan for at least one stop to stretch your legs or refuel, especially considering the longest continuous stretch is nearly 90 miles. Keep an eye on local traffic patterns, as the 'turn-heavy' profile suggests potential slowdowns near intersections.
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 Killeen, TX, or about 1h 21m into the drive.
The longest continuous stretch on this route runs about 89.6 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 36m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 72.8 miles or 1h 21m 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 12m
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 Killeen, 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 Killeen, TX
This is one driving day of about 145.5 miles and 2h 44m.
Your first comfortable stop window is around 32 miles from Killeen, 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 89.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 72.8 mi from Killeen, TX · 1h 21m into the drive
Mid-route town
Meal stop
73 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 32 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 72.8 miles from Killeen, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before Purple Heart Trail if your tank is already low. That segment runs about 89.6 miles.
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
$21.99 one way
$43.97 round trip
$3.84/gal
25.4 MPG avg
51 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.20 | $24.06 | $48.13 |
| premium | $4.54 | $25.98 | $51.96 |
| diesel | $5.61 | $32.12 | $64.25 |
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 | $15.28 | $6.98 |
| Efficient EV | 36.4 | 0 | $12.73 | $5.82 |
| EV Truck/SUV | 58.2 | 0 | $20.37 | $9.31 |
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.
Destination
San Antonio, TX
Night in San Antonio on Wednesday
Local time
11:39 PM
CDT
Current temp
77°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
17 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
2h 44m 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 Killeen, TX to San Antonio, TX covers 145.5 miles and takes about 2h 44m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Purple Heart Trail, South Fort Hood Street, North Pan Am Expressway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 72.8 miles from Killeen, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $21.99 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.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This is a demanding drive. With 17 significant decision points across 145.5 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.
The main spots that need attention: at 63.9 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 137.4 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here; at 143.8 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
The route from Killeen, TX to San Antonio, TX does not surface many named destination signs beyond the main corridor.
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