Jet Lag from San Francisco to Singapore

Singapore runs 15 hours ahead of San Francisco — a eastbound shift over a roughly 17-hour flight. Expect about 15 days to feel close to normal in Singapore.

What to expect

Eastward shifts compress the day and fight the natural drift of the human circadian rhythm, so they tend to feel harder than westward shifts of the same magnitude.

Adjustment playbook

• Shift bedtime earlier by ~1 hour per day before departure.
• Reset your watch to Singapore time at boarding.
• On arrival, get bright morning light and avoid bright evening light.
• Caffeine in the morning only.

Open in planner

Build a personalized day-by-day plan for San Francisco → Singapore with your dates, sleep profile, and fixed activities at Jet Zzz.