Drive or Fly: San Jose, CA to Union City, 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 SJC–SQL. At 23 miles, driving is the only practical option.

Passengers:

Vehicle:

Find Your Vehicle (EPA fuel economy data)

Drive

Door to Door

31m

Distance

23 mi

Total Cost

$40

CO2

9 kg

Cost Breakdown

Diesel$5

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

2h 28m

2m in the air

Air Distance

20 mi

Total Cost

$121

CO2

5 kg

Door-to-Door Timeline

San Jose, CA → SJC 10m

Check-in & Security 90m

Flight 2m

Arrival & Baggage 30m

SQL → Union City, CA 16m

Cost Breakdown

Ticket (1 pax @ $121) $121

Airports

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

Union City, CA SQL — San Carlos Airport 11 mi, ~16m drive

No scheduled flights found

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

+ Less physical fatigue

+ Predictable arrival time

− Airport security and check-in overhead

− No scheduled commercial flights found for this route

− Luggage fees and restrictions

− Less flexibility for stops along the way

Train

Amtrak

Door to Door

1h 31m

31m on rail

Total Cost

CO2

1 kg

Route

Capitol Corridor

Door-to-Door Timeline

San Jose, CA → San Jose 10m

Boarding 30m

Train ride 31m

Arrival 10m

Fremont → Union City, CA 10m

Cost Breakdown

Ticket (1 pax @ $3) $3

Estimated based on distance. Check amtrak.com for current prices.

Stations

From San Jose 1 mi, ~10m drive

To Fremont 5 mi, ~10m drive

Service

Direct

Frequency

~42/week

+ Spacious seating with legroom and power outlets

+ Walk around freely during the trip

+ No driving fatigue — relax or work en route

+ Much lower carbon footprint than driving or flying

− Amtrak delays can be unpredictable

− Need transportation to/from station

− Less flexibility than driving

Bus

FlixBus

Door to Door

1h 20m

35m on road

Total Cost

CO2

1 kg

Route

Greyhound US0831

Door-to-Door Timeline

San Jose, CA → San Jose Diridon Station (SJO6) 10m

Boarding 15m

Bus ride 35m

Arrival 10m

Hayward Bus Station (UHW) → Union City, CA 10m

Cost Breakdown

Ticket (1 pax @ $3) $3

Estimated based on distance. Check flixbus.com for current prices.

Stations

From SJO6 — San Jose Diridon Station 1 mi, ~10m drive

To UHW — Hayward Bus Station 5 mi, ~10m drive

Service

Direct

Frequency

~8/week

+ Usually the cheapest option

+ Wi-Fi and power outlets on board

+ No driving fatigue — relax or work en route

+ Much lower carbon footprint than driving or flying

− Limited schedule — about 8 trips per week

− Travel time longer than driving

− Need transportation to/from station

− Less flexibility than driving

At a Glance

	Drive	Fly	Train	Bus
Door-to-door time	31m	2h 28m	1h 31m	1h 20m
Total cost (1 person)	$40	$121	$3	$3
Carbon footprint	9 kg CO₂	5 kg CO₂	1 kg CO₂	1 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

Transit: Amtrak GTFS, FlixBus GTFS — fares estimated

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 San Jose, CA to Union City, CA with stops, fuel costs, and turn-by-turn directions.