Canceled or badly delayed at San Francisco: get to the United hub desks in Terminal 3 - international is handled in the separate international terminal - and work the airline app while you stand in line. AirTrain connects the terminals though some transfers require re-screening, Oakland and San Jose are both a train ride away, and if nothing works you are owed a full cash refund. Details below. Facts reviewed August 2026.
United hub in T3. International is handled in the separate international terminal. Any gate agent for your carrier can also rebook you - during a meltdown, a quiet gate's agent often beats the service-desk line. Work the airline app in parallel; whichever answers first wins.
AirTrain connects the terminals, but some transfers require re-screening. A realistic minimum connection at SFO is about 60 minutes; tighter than that and you should be asking an agent to protect you on the next flight now, not running.
Oakland (OAK) is 22 miles away (about a 40-minute drive, or BART) and San Jose (SJC) is 35 miles (about 50 minutes, or Caltrain). Both are reachable by train, which matters when fog shuts SFO and the others stay open. Booking a different airline does not burn your money: if your SFO flight was canceled and you do not travel on it, the unused ticket comes back as a refund or credit.
BART runs directly from the international terminal - useful for reaching the city or a hotel - and Caltrain connects via Millbrae. The same trains are how you reach the backups without a car: BART toward Oakland, Caltrain toward San Jose.
Ask the airline what it covers before you book anything: most large US carriers commit to a hotel, or reimbursement, when an overnight disruption was in their control (mechanical, crew) - weather is usually on you. Lock in tomorrow's seat before hunting for a bed; seats vanish faster than rooms. Lounges if you hold access: United Polaris (Intl) and the Centurion Lounge (T3).
Canceled and you choose not to travel: a full cash refund to your original payment method under US DOT rules, on any fare type, whatever the cause - a voucher only replaces it if you knowingly accept one. Checked a bag? Here is exactly what happens to it and when the bag fee comes back. The full rundown with figures: Know Your Rights.
TripHero's search checks every airline at SFO, Oakland and San Jose next door, and ranks everything by when you would actually arrive - drive time included.
Search every route from SFOAirport facts (desk locations, AirTrain, connection minimums, BART) from TripHero's curated airport knowledge base, reviewed August 2026. Refund rules: US DOT automatic-refund rule. Hotel commitments: DOT airline customer-service dashboard. General guidance, not legal advice; airport operations change - tell us if something here is out of date.
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