SFO vs OAK vs SJC: Which Bay Area Airport Is Best?

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Airport Breakdown

SFO

San Francisco International

Best for

International travel to Europe, Asia, and premium long-haul routes. If you're flying to London, Tokyo, or anywhere requiring a major carrier, SFO is your only real option—it has 60+ international destinations versus OAK's 15 and SJC's 8.

Not ideal for

Domestic flights to secondary US cities and price-sensitive budget travelers. SFO charges $17.50 facility fees per ticket and adds $5+ to most fares compared to OAK. Parking starts at $26/day, and it's consistently 15-20 minutes farther from South Bay.

Cheapest for: Only competitive on routes where carriers must fly there (transatlantic, transpacific). Won't save you money on domestic routes—OAK almost always undercuts on flights to LA, Las Vegas, Phoenix.

Getting There

BART directly into the terminal: $10.65 peak/off-peak, 30 minutes from downtown SF. Caltrain to Millbrae station + BART connection: $3.25-4.75, 35 minutes from South SF. Rideshare $18-35 depending on surge. Park-and-fly: $26/day standard lot, $22/day economy.

Pro Tip

Book SFO flights on Tuesday mornings—this is when airlines release premium transatlantic inventory and SFO typically prices below competitors for that single window.

OAK

Oakland International

Best for

Domestic flights, Southwest fanatics, and East Bay residents. Southwest operates 80% of flights here, making it the cheapest and most flexible option for US travel. If you're flying to LA, Vegas, Phoenix, Denver, or Chicago, OAK undercuts SFO by $30-80 routinely.

Not ideal for

Anything requiring international travel beyond Mexico/Caribbean. No flights to Europe or Asia. Limited premium cabin options—mostly low-cost carriers.

Cheapest for: Southwest Companion Pass holders and anyone flying domestic. Southwest flights from OAK are consistently $25-65 cheaper than SFO equivalents. LA routes especially—expect $89-149 round-trip versus $140-200 from SFO.

Getting There

BART to OAK: $10.65 peak, 40 minutes from downtown SF (longer than SFO—this is the real trade-off). Rideshare $14-25 (cheaper than SFO). Parking $18/day standard lot. No Caltrain connection.

Pro Tip

OAK is where Southwest releases flash sales first—set price alerts specifically for OAK flights 6-8 weeks out. You'll catch deals here 2-3 days before SFO sees the same route discounted.

SJC

San Jose International

Best for

South Bay residents (Santa Clara, San Jose, Mountain View, Sunnyvale). If you're in the Valley, SJC saves 30 minutes of driving versus SFO and is actually cheaper when you factor in gas. Parking is $18/day and easier to navigate.

Not ideal for

Flights with connections and international travel. SJC has minimal connecting traffic—if your route requires a change, you'll likely pay more or get worse times. Only 8 international destinations means heavy positioning fees for most trips.

Cheapest for: Strictly for South Bay residents on Southwest flights to LA, Phoenix, Las Vegas, and Denver. For those passengers, SJC prices identically to OAK but saves you 30 minutes each way. Not cheaper overall—just time-competitive.

Getting There

No direct BART. Caltrain to downtown San Jose (not the airport). Rideshare $8-18 from downtown San Jose, $25-35 from SF. This is the real disadvantage—you're reliant on rideshare or personal vehicle. Parking $18/day.

Pro Tip

SJC only makes sense if you live in Sunnyvale, San Jose, or Mountain View. For everyone else, the lack of transit infrastructure kills the savings. But if you ARE South Bay-based, booking SJC + Southwest combo beats both competitors on total trip cost.

Our Verdict

SFO is mandatory for international travel outside Mexico/Caribbean—no competition. OAK wins for domestic flights and Southwest passengers everywhere in the Bay (best prices, BART access, most Southwest flights). SJC only beats the others if you live south of Palo Alto; otherwise, transit friction erases any savings. For most travelers: check OAK first for domestic, SFO for anything international.

Frequently Asked Questions

Which San Francisco airport is cheapest?

OAK is cheapest for domestic travel—expect $30-80 less on domestic round-trips versus SFO, especially Southwest routes. SFO is occasionally cheaper for international if there's carrier competition (like Paris), but OAK's facility fees are lower. SJC is a wash unless you live in South Bay.

Which has the most international flights?

SFO dominates with 60+ international destinations. OAK has maybe 15 (mostly Caribbean/Mexico via Southwest). SJC has 8. If you need international flights, SFO is your only real option.

What's the actual transit difference?

SFO: BART 30 min, $10.65. OAK: BART 40 min, $10.65. SJC: Rideshare $25-35, no direct transit. If you're carless, SFO and OAK are equivalent; SJC is a hassle unless you drive.

Should I ever choose SJC?

Only if you live in San Jose, Sunnyvale, Mountain View, or Palo Alto and are flying Southwest to LA/Vegas/Phoenix. Otherwise, the transit burden and limited route network don't justify it.

Does Southwest Companion Pass change the math?

Massively. If you have a Companion Pass, OAK becomes unbeatable—you get the cheapest Southwest fares plus free companion flights. Worth positioning your trip through OAK if you have the pass.