Drive or Fly: Killeen, TX to Harlingen, 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–HRL. At 371 miles, driving is the only practical option.

Passengers:

Vehicle:

Find Your Vehicle (EPA fuel economy data)

Drive

Door to Door

6h 56m

Distance

371.9 mi

Total Cost

$117

CO2

150 kg

Cost Breakdown

Diesel$82

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 1m

41m in the air

Air Distance

340 mi

Total Cost

$189

CO2

87 kg

Door-to-Door Timeline

Killeen, TX → GRK 10m

Check-in & Security 90m

Flight 41m

Arrival & Baggage 30m

HRL → Harlingen, TX 10m

Cost Breakdown

Ticket (1 pax @ $134) $134

Rental car (1 day)$55

Airports

Killeen, TX GRK — Killeen Regional Airport / Robert Gray Army Airfield 7 mi, ~10m drive

Harlingen, TX HRL — Valley International Airport 4 mi, ~10m drive

No scheduled flights found

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

+ Saves about 3h 55m compared to driving

+ Less physical fatigue

+ Predictable arrival time

− Airport security and check-in overhead

− No scheduled commercial flights found for this route

− May need a rental car at destination

− Luggage fees and restrictions

− Less flexibility for stops along the way

At a Glance

	Drive	Fly
Door-to-door time	6h 56m	3h 1m
Total cost (1 person)	$117	$189
Carbon footprint	150 kg CO₂	87 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

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 21, 2026.

Route Options

2 different routes between these cities.

Fastest

371.9 mi 6h 55m

via US 77, TX 130 Toll, I 69E; US 77

Alternative (+26 min)

398.4 mi 7h 22m

via I 37; US 281, US 281, US 77

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