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

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

Could go either way

Medium

This distance is a toss-up. Drive if you want flexibility and lower cost, fly if you value time. Connecting flights add time.

Passengers:

Vehicle:

Find Your Vehicle (EPA fuel economy data)

Drive

Door to Door

8h 12m

Distance

445.5 mi

Total Cost

$143

CO2

180 kg

Cost Breakdown

Diesel$108

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 26m

34m in the air

Air Distance

286 mi

Total Cost

$186

CO2

73 kg

Door-to-Door Timeline

Post Falls, ID → GEG 42m

Check-in & Security 90m

Flight 34m

Arrival & Baggage 30m

BOI → Boise, ID 10m

Cost Breakdown

Ticket (1 pax @ $131) $131

Rental car (1 day)$55

Airports

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

Boise, ID BOI — Boise Air Terminal/Gowen Field 4 mi, ~10m drive

Flight Data

Service

Connecting only

On-Time

100.0%

+ Saves about 4h 46m 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	8h 12m	3h 26m
Total cost (1 person)	$143	$186
Carbon footprint	180 kg CO₂	73 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 Oct 19, 2026.

Route Options

2 different routes between these cities.

Fastest

445.5 mi 8h 12m

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

Shortest (+12 min)

386.3 mi 8h 25m

via US 95, ID 55, I 90

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