San Francisco to London Time Difference

How many hours is San Francisco behind London?

London is 8 hours ahead of San Francisco. When it is 12:00 noon in San Francisco, it is 20:00 in London. San Francisco operates on America/Los Angeles (UTC-7), while London uses Europe/London (UTC+1).

What is the best time to call London from San Francisco?

Standard business hours (9 AM–5 PM) do not overlap between San Francisco and London due to the 8 hours difference. Consider early morning or late evening calls, or use async communication.

Does the San Francisco to London time difference change throughout the year?

The time difference can shift by up to one hour when either city observes Daylight Saving Time (DST). DST transition dates differ between countries — typically March/April in the Northern Hemisphere and October in the Southern Hemisphere. Always verify the live difference above when scheduling important meetings near DST changeover dates.

Flying between San Francisco and London

The distance between San Francisco and London is approximately 8,617 km. A direct flight typically takes around 11.1 hours. Your arrival clock will show local London time — use our Flight Time Calculator to predict exact arrival times.