Drive or Fly: Austin, TX to Castle Hills, 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 AUS–SAT. At 76 miles, driving is the only practical option.

Passengers:

Vehicle:

Find Your Vehicle (EPA fuel economy data)

Drive

Door to Door

1h 26m

Distance

76 mi

Total Cost

$52

CO2

31 kg

Cost Breakdown

Diesel$17

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 28m

8m in the air

Air Distance

69 mi

Total Cost

$123

CO2

18 kg

Door-to-Door Timeline

Austin, TX → AUS 10m

Check-in & Security 90m

Flight 8m

Arrival & Baggage 30m

SAT → Castle Hills, TX 10m

Cost Breakdown

Ticket (1 pax @ $123) $123

Airports

Austin, TX AUS — Austin Bergstrom International Airport 7 mi, ~10m drive

Castle Hills, TX SAT — San Antonio International Airport 3 mi, ~10m drive

No scheduled flights found

No commercial flights between AUS 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

Train

Amtrak

Door to Door

4h 25m

3h 24m on rail

Total Cost

$15

CO2

4 kg

Route

Texas Eagle

Door-to-Door Timeline

Austin, TX → Austin 10m

Boarding 30m

Train ride 204m

Arrival 10m

San Antonio Amtrak Station → Castle Hills, TX 11m

Cost Breakdown

Ticket (1 pax @ $15) $15

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

Stations

From Austin 1 mi, ~10m drive

To San Antonio Amtrak Station 8 mi, ~11m drive

Service

Direct

Frequency

~10/week

+ Spacious seating with legroom and power outlets

+ Walk around freely during the trip

+ No driving fatigue — relax or work en route

+ Much lower carbon footprint than driving or flying

− Limited schedule — about 10 trips per week

− Amtrak delays can be unpredictable

− Need transportation to/from station

− Less flexibility than driving

Bus

FlixBus

Door to Door

2h 38m

1h 53m on road

Total Cost

CO2

4 kg

Route

FlixBus 2230

Door-to-Door Timeline

Austin, TX → Downtown Austin (9th St) (2AS) 10m

Boarding 15m

Bus ride 113m

Arrival 10m

San Antonio Pearl District (2SP) → Castle Hills, TX 10m

Cost Breakdown

Ticket (1 pax @ $8) $8

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

Stations

From 2AS — Downtown Austin (9th St) 1 mi, ~10m drive

To 2SP — San Antonio Pearl District 6 mi, ~10m drive

Service

Direct

Frequency

~28/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

− Travel time longer than driving

− Need transportation to/from station

− Less flexibility than driving

At a Glance

	Drive	Fly	Train	Bus
Door-to-door time	1h 26m	2h 28m	4h 25m	2h 38m
Total cost (1 person)	$52	$123	$15	$8
Carbon footprint	31 kg CO₂	18 kg CO₂	4 kg CO₂	4 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: Amtrak GTFS, 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 16, 2026.

Decided to drive? See the full trip plan from Austin, TX to Castle Hills, TX with stops, fuel costs, and turn-by-turn directions.