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Drive or Fly: Fontana, CA to Mill Valley, CA?

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 ONT–OAK. At 440 miles, driving is the only practical option.

Passengers:
Vehicle:

Find Your Vehicle (EPA fuel economy data)

Drive

Door to Door

8h 17m

Distance

440.6 mi

Total Cost

$132

CO2

178 kg

Cost Breakdown

Diesel$97
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 35m

47m in the air

Air Distance

388 mi

Total Cost

$191

CO2

99 kg

Door-to-Door Timeline

Fontana, CA → ONT 15m
Check-in & Security 90m
Flight 47m
Arrival & Baggage 30m
OAK → Mill Valley, CA 33m

Cost Breakdown

Ticket (1 pax @ $136) $136
Rental car (1 day)$55

Airports

Fontana, CA ONT — Ontario International Airport 10 mi, ~15m drive
Mill Valley, CA OAK — San Francisco Bay Oakland International Airport 22 mi, ~33m drive

No scheduled flights found

No commercial flights between ONT and OAK. Flight estimates above are theoretical.

+ Saves about 4h 42m 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 8h 17m 3h 35m
Total cost (1 person) $132 $191
Carbon footprint 178 kg CO2 99 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.

Decided to drive? See the full trip plan from Fontana, CA to Mill Valley, CA with stops, fuel costs, and turn-by-turn directions.