plane.jpgRainy weather and low visibility are causing flight delays at San Francisco International Airport today, a duty manager said.

About 20 percent of arriving and departing domestic flights are experiencing delays of 30 minutes to an hour, SFO duty manager Jeff Littlefield said.

The delays began this morning and are expected to last until 8 p.m.

International flights are not significantly affected by the weather today, Littlefield said.

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