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

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 IDA–GEG. At 490 miles, driving is the only practical option.

Passengers:

Vehicle:

Drive

Door to Door

7h 28m

Distance

490.8 mi

Total Cost

$144

CO2

198 kg

Cost Breakdown

Diesel$109

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 37m

45m in the air

Air Distance

378 mi

Total Cost

$190

CO2

96 kg

Door-to-Door Timeline

Idaho Falls, ID → IDA 10m

Check-in & Security 90m

Flight 45m

Arrival & Baggage 30m

GEG → Post Falls, ID 42m

Cost Breakdown

Ticket (1 pax @ $135) $135

Rental car (1 day)$55

Airports

Idaho Falls, ID IDA — Idaho Falls Regional Airport 4 mi, ~10m drive

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

No scheduled flights found

No commercial flights between IDA and GEG. Flight estimates above are theoretical.

+ Saves about 3h 51m 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	7h 28m	3h 37m
Total cost (1 person)	$144	$190
Carbon footprint	198 kg CO₂	96 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 13, 2026.

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