Fog at SFO leaves passengers stuck on the plane for 20 hours

The Bay Area's infamous fog can be merciless when it comes to delaying flights at San Francisco International Airport.

Just ask those arriving on a United Airlines flight from New Delhi, India last Friday morning when fog diverted their 15-hour, SFO-bound flight to Oakland International Airport.

Flight 105 landed in the East Bay at 6:15 a.m., but passengers said they spent more than four hours sitting on the plane waiting for that airport's customs and immigration halls to open.