Chile Jet Lag Calculator

From London the shift to Santiago is 3 hours westward; New York faces 2; Tokyo 12; Sydney 13. Jet lag into Santiago scales with one number: |home offset − -3|.

Context for the adjustment: Santiago rests at 570 m above sea level, and Chile's position in South America shapes both flight routing and how much daylight you meet on arrival. Reference frame for Chile: Santiago keeps UTC-3 and sits 570 m above sea level in South America, with daylight saving nudging summer clocks an hour.

Day one in Santiago: sunlight before midday. Meals go on the local clock in Chile, and lights-out stays no earlier than 9:30pm so the body accepts the new zone. Direction changes the bill: flying to Chile westward from London costs about 2 days of recovery.

The eastward routing to Santiago costs only 3 — the body clock delays to Chile more easily than it advances. Move 30–60 minutes daily toward Santiago time (UTC-3) for 3–4 days pre-flight. Keep the Chile flight alcohol-free.

Treat the cabin as a preview of Chile time rather than home time. Applied to this South America trip: 3 hours west from London to Santiago maps to about 2 reset days, so a Chile itinerary should front-load outdoor time on days one to 2.

Near-4am wakings are part of night one in Santiago (570 m, UTC-3); stay dark and still, skip the clock-checking, and Chile nights settle by the third. Naps are a tool with a limit in Chile: 20–30 minutes, done by 3pm Santiago time, never as a substitute for a full local night. For shifts over six hours — into Chile, that means the 3-hour London gap — 0.5–3 mg of melatonin at Santiago bedtime (UTC-3) pulls the clock faster in 3–4 nights.

Clear Chile dosing with a clinician first. Practical baseline: lights out in a dark 16–20°C Santiago room (570 m, UTC-3), and no evening alcohol for the first two nights while the Chile clock settles.