Drive or Fly: Diamond Bar, CA to San Jose, 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–SJC. At 366 miles, driving is the only practical option.

Passengers:

Vehicle:

Drive

Door to Door

6h 55m

Distance

366.7 mi

Total Cost

$116

CO2

148 kg

Cost Breakdown

Diesel$81

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 7m

39m in the air

Air Distance

324 mi

Total Cost

$188

CO2

83 kg

Door-to-Door Timeline

Diamond Bar, CA → ONT 18m

Check-in & Security 90m

Flight 39m

Arrival & Baggage 30m

SJC → San Jose, CA 10m

Cost Breakdown

Ticket (1 pax @ $133) $133

Rental car (1 day)$55

Airports

Diamond Bar, CA ONT — Ontario International Airport 12 mi, ~18m drive

San Jose, CA SJC — Norman Y. Mineta San Jose International Airport 3 mi, ~10m drive

No scheduled flights found

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

+ Saves about 3h 48m 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 55m	3h 7m
Total cost (1 person)	$116	$188
Carbon footprint	148 kg CO₂	83 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 12, 2026.

Decided to drive? See the full trip plan from Diamond Bar, CA to San Jose, CA with stops, fuel costs, and turn-by-turn directions.