The flight from Bangkok (BKK) to San Francisco (SFO) takes about 13h 42m nonstop on a widebody airliner, covering 7,923 miles (12,751 km).
San Francisco is 14 hours behind Bangkok. You cross 14 time zones heading west. Westbound trips like this one are usually a little easier to adjust to, so plan for a day or two of jet lag.
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