Drive or Fly: Post Falls, ID to Star, ID?

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

Driving wins

Medium

Driving is significantly cheaper and the distance is manageable in one day.

Passengers:

Vehicle:

Find Your Vehicle (EPA fuel economy data)

Drive

Door to Door

7h 55m

Distance

426.3 mi

Total Cost

$125

CO2

172 kg

Cost Breakdown

Diesel$90

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

− Driver fatigue on longer stretches

− Wear and tear on vehicle

− Fuel price fluctuations

Plan the drive

Fly

Door to Door

3h 39m

33m in the air

Air Distance

279 mi

Total Cost

$186

CO2

71 kg

Door-to-Door Timeline

Post Falls, ID → GEG 42m

Check-in & Security 90m

Flight 33m

Arrival & Baggage 30m

BOI → Star, ID 24m

Cost Breakdown

Ticket (1 pax @ $131) $131

Rental car (1 day)$55

Airports

Post Falls, ID GEG — Spokane International Airport 28 mi, ~42m drive

Star, ID BOI — Boise Air Terminal/Gowen Field 16 mi, ~24m drive

Flight Data

Service

Connecting only

On-Time

100.0%

+ Saves about 4h 16m compared to driving

+ Less physical fatigue

+ Predictable arrival time

− Airport security and check-in overhead

− 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	7h 55m	3h 39m
Total cost (1 person)	$125	$186
Carbon footprint	172 kg CO₂	71 kg CO₂
Flexibility	High	Low
Luggage	Unlimited	Restricted
Reliability	Weather dependent	100% on-time

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 Jun 3, 2026.

Route Options

2 different routes between these cities.

Fastest

426.3 mi 7h 55m

via I 84; US 30; US 395, US 395, I 90; US 395

Shortest (+22 min)

398.4 mi 8h 17m

via US 95, I 84, ID 44

Decided to drive? See the full trip plan from Post Falls, ID to Star, ID with stops, fuel costs, and turn-by-turn directions.