Drive or Fly: Harker Heights, TX to San Antonio, TX?

Side-by-side comparison of driving versus flying for this route. Costs, time, and trade-offs at a glance.

Driving wins

Medium

No scheduled commercial flights found for GRK–SAT. At 170 miles, driving is the only practical option.

Passengers:

Vehicle:

Drive

Door to Door

2h 28m

Distance

170.7 mi

Total Cost

$73

CO2

69 kg

Cost Breakdown

Diesel$38

Hotel (1 room, 0 nights) $0

Meals (1 pax, 1 day) $35

+ No luggage restrictions or TSA lines

+ Comfortable one-day drive

+ Stop anywhere along the route

+ Have your own car at the destination

+ Likely faster door-to-door than flying

− Wear and tear on vehicle

− Fuel price fluctuations

Plan the drive

Fly

Door to Door

2h 42m

15m in the air

Air Distance

125 mi

Total Cost

$125

CO2

32 kg

Door-to-Door Timeline

Harker Heights, TX → GRK 15m

Check-in & Security 90m

Flight 15m

Arrival & Baggage 30m

SAT → San Antonio, TX 12m

Cost Breakdown

Ticket (1 pax @ $125) $125

Airports

Harker Heights, TX GRK — Killeen Regional Airport / Robert Gray Army Airfield 10 mi, ~15m drive

San Antonio, TX SAT — San Antonio International Airport 8 mi, ~12m drive

No scheduled flights found

No commercial flights between GRK and SAT. Flight estimates above are theoretical.

+ Less physical fatigue

+ Predictable arrival time

− Airport security and check-in overhead

− No scheduled commercial flights found for this route

− Luggage fees and restrictions

− Less flexibility for stops along the way

Bus

FlixBus

Door to Door

4h 55m

3h 30m on road

Total Cost

$14

CO2

10 kg

Door-to-Door Timeline

Harker Heights, TX → Killeen (KLE6) 30m

Boarding 15m

Bus ride 210m

Arrival 10m

San Antonio Bus Station (SNT6) → San Antonio, TX 30m

Cost Breakdown

Ticket (1 pax @ $14) $14

Estimated based on distance. Check flixbus.com for current prices.

Stations

From KLE6 — Killeen 0 mi, ~30m drive

To SNT6 — San Antonio Bus Station 0 mi, ~30m drive

Service

Direct

Frequency

~7/week

+ Usually the cheapest option

+ Wi-Fi and power outlets on board

+ No driving fatigue — relax or work en route

+ Much lower carbon footprint than driving or flying

− Limited schedule — about 7 trips per week

− Travel time longer than driving

− Need transportation to/from station

− Less flexibility than driving

At a Glance

	Drive	Fly	Bus
Door-to-door time	2h 28m	2h 42m	4h 55m
Total cost (1 person)	$73	$125	$14
Carbon footprint	69 kg CO₂	32 kg CO₂	10 kg CO₂
Flexibility	High	Low
Luggage	Unlimited	Restricted
Reliability	Weather dependent	Data unavailable

Drive data: OSRM routing, EIA fuel prices

Flight data: Statistical estimate

Airports: OurAirports

Transit: FlixBus GTFS — fares estimated

Confidence: Medium — airports identified, fares estimated

Costs are estimates. Actual flight prices vary by airline, date, and booking time. Drive costs based on OSRM routing, EIA fuel prices. Computed Apr 12, 2026.

Decided to drive? See the full trip plan from Harker Heights, TX to San Antonio, TX with stops, fuel costs, and turn-by-turn directions.