Drive or Fly: San Marcos, TX to Killeen, TX?
Side-by-side comparison of driving versus flying for this route. Costs, time, and trade-offs at a glance.
Driving wins
MediumNo scheduled commercial flights found for AUS–GRK. At 97 miles, driving is the only practical option.
Find Your Vehicle (EPA fuel economy data)
· · Fuel cost: $
Drive
Door to Door
1h 52m
Distance
97.3 mi
Total Cost
$56
CO2
39 kg
Cost Breakdown
Fly
Door to Door
3h 1m
10m in the air
Air Distance
86 mi
Total Cost
$123
CO2
22 kg
Door-to-Door Timeline
Cost Breakdown
Airports
No scheduled flights found
No commercial flights between AUS and GRK. Flight estimates above are theoretical.
At a Glance
| Drive | Fly | |
|---|---|---|
| Door-to-door time | 1h 52m | 3h 1m |
| Total cost (1 person) | $56 | $123 |
| Carbon footprint | 39 kg CO2 | 22 kg CO2 |
| Flexibility | High | Low |
| Luggage | Unlimited | Restricted |
| Reliability | Weather dependent | Data unavailable |
Costs are estimates. Actual flight prices vary by airline, date, and booking time. Drive costs based on OSRM routing, EIA fuel prices. Computed Apr 18, 2026.
Route Options
2 different routes between these cities.
via TX 195, I 35; US 290, I 35
via TX 45 Toll; TX 130 Toll, TX 195, I 35
Decided to drive? See the full trip plan from San Marcos, TX to Killeen, TX with stops, fuel costs, and turn-by-turn directions.