Drive or Fly: Katy, 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 IAH–SAT. At 166 miles, driving is the only practical option.

Passengers:

Vehicle:

Drive

Door to Door

2h 55m

Distance

166.6 mi

Total Cost

$72

CO2

67 kg

Cost Breakdown

Diesel$37

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

3h 19m

19m in the air

Air Distance

162 mi

Total Cost

$126

CO2

41 kg

Door-to-Door Timeline

Katy, TX → IAH 48m

Check-in & Security 90m

Flight 19m

Arrival & Baggage 30m

SAT → San Antonio, TX 12m

Cost Breakdown

Ticket (1 pax @ $126) $126

Airports

Katy, TX IAH — George Bush Intercontinental Airport 32 mi, ~48m drive

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

No scheduled flights found

No commercial flights between IAH 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

6h 41m

5h 10m on rail

Total Cost

$38

CO2

11 kg

Route

Sunset Limited

Door-to-Door Timeline

Katy, TX → Houston 41m

Boarding 30m

Train ride 310m

Arrival 10m

San Antonio Amtrak Station → San Antonio, TX 10m

Cost Breakdown

Ticket (1 pax @ $38) $38

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

Stations

From Houston 27 mi, ~41m drive

To San Antonio Amtrak Station 1 mi, ~10m drive

Service

Direct

Frequency

~2/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 2 trips per week

− Amtrak delays can be unpredictable

− Need transportation to/from station

− Less flexibility than driving

Bus

FlixBus

Door to Door

3h 40m

2h 55m on road

Total Cost

$18

CO2

9 kg

Route

Greyhound US1110

Door-to-Door Timeline

Katy, TX → Katy (Food Mart) (KYY6) 10m

Boarding 15m

Bus ride 175m

Arrival 10m

San Antonio Bus Station (SNT6) → San Antonio, TX 10m

Cost Breakdown

Ticket (1 pax @ $18) $18

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

Stations

From KYY6 — Katy (Food Mart) 0 mi, ~10m drive

To SNT6 — San Antonio Bus Station 0 mi, ~10m 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	Train	Bus
Door-to-door time	2h 55m	3h 19m	6h 41m	3h 40m
Total cost (1 person)	$72	$126	$38	$18
Carbon footprint	67 kg CO₂	41 kg CO₂	11 kg CO₂	9 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 12, 2026.

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