Drive or Fly: Greenfield, CA to San Diego, 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 MRY–SAN. At 395 miles, driving is the only practical option.

Passengers:

Vehicle:

Drive

Door to Door

6h 40m

Distance

395.1 mi

Total Cost

$122

CO2

160 kg

Cost Breakdown

Diesel$87

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 48m

41m in the air

Air Distance

340 mi

Total Cost

$189

CO2

87 kg

Door-to-Door Timeline

Greenfield, CA → MRY 57m

Check-in & Security 90m

Flight 41m

Arrival & Baggage 30m

SAN → San Diego, CA 10m

Cost Breakdown

Ticket (1 pax @ $134) $134

Rental car (1 day)$55

Airports

Greenfield, CA MRY — Monterey Regional Airport 38 mi, ~57m drive

San Diego, CA SAN — San Diego International Airport 2 mi, ~10m drive

No scheduled flights found

No commercial flights between MRY and SAN. Flight estimates above are theoretical.

+ Saves about 2h 52m 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 40m	3h 48m
Total cost (1 person)	$122	$189
Carbon footprint	160 kg CO₂	87 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 16, 2026.

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