The flight from San Diego (SAN) to Bangkok (BKK) takes about 15h 30m nonstop on a widebody airliner, covering 8,368 miles (13,467 km).
Bangkok is 14 hours ahead of San Diego. You cross 14 time zones heading east. Eastbound trips like this one tend to be harder to adjust to, so plan for a day or two of jet lag.
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