On top of mudslides, breached levees, flooding and traffic messes, this week’s storm — the strongest of the season — has also interrupted hundreds of flights at the Bay Area’s airports.

By 8:30 p.m. Friday, San Francisco International Airport reported 475 delays and 25 cancellations, airport duty manager Maria Buyco said.

The airport also enacted a ground delay program, where incoming flights are held at their departure airports, at 1:30 p.m. Friday that would impact afternoon and evening flights. Morgan said the ground delay was prompted by the weather. The average delays on Friday were about 90 minutes, Buyco said.

On Thursday, the airport saw 490 delays, ranging between one minute and two hours, and 123 cancellations. The canceled flights were mostly commuter planes departing from and landing on the West Coast, said airport duty manager Chris Morgan.

Mineta San Jose International Airport reported three cancellations Friday on outbound flights because of weather elsewhere, spokeswoman Rosemary Barnes said. The airport also received a diverted flight that was originaly scheduled to land at San Francisco International Airport, she said.

The airport, which has 250 commercial departures per day, had three cancellations on Thursday.

There were no canceled or delayed at Oakland International Airport on Friday.