Smoke from numerous wildfires in the North Bay was affecting visibility Thursday at San Francisco International Airport, resulting in many delays and cancellations, an airport spokesperson said.
As of mid-morning, 81 flights had been canceled and about 10 percent of flights were delayed an average of 30 to 45 minutes, SFO spokesperson Doug Yakel said.
The number of cancellations is about evenly split between arrivals and departures.
Smoke from the wildfires has not affected operations at Oakland International Airport, but two flights from San Francisco International Airport have landed in Oakland because of the problems at SFO.
A spokesperson for Mineta San Jose International Airport said she had not heard of smoke affecting any flights there Thursday.
No impacts were reported Wednesday either, spokesperson Rosemary Barnes said.