Argentina Jet Lag Calculator

The size of your Argentina jet lag is the absolute gap between your home offset and Buenos Aires's UTC-3. Context for the adjustment: Buenos Aires rests at 25 m above sea level, and Argentina's position in South America shapes both flight routing and how much daylight you meet on arrival.

Argentina keeps a single reference offset of UTC-3 across Buenos Aires, so the mental math never changes mid-trip. Reference frame for Argentina: Buenos Aires keeps UTC-3 and sits 25 m above sea level in South America, with that same offset in every season.

Direction changes the bill: flying to Argentina westward from London costs about 2 days of recovery. The eastward routing to Buenos Aires costs only 3 — the body clock delays to Argentina more easily than it advances. Sip an extra 500 ml of water for every 3 hours in the air to Buenos Aires; cabin air on the 3-hour Argentina run is drier than most deserts.

Move 30–60 minutes daily toward Buenos Aires time (UTC-3) for 3–4 days pre-flight. Keep the Argentina flight alcohol-free. Treat the cabin as a preview of Argentina time rather than home time.

Applied to this South America trip: 3 hours west from London to Buenos Aires maps to about 2 reset days, so a Argentina itinerary should front-load outdoor time on days one to 2.

Cap naps at 20–30 minutes and finish them by 3pm Buenos Aires time (UTC-3); anything longer steals the night that actually resets your clock to Argentina. For shifts over six hours — into Argentina, that means the 3-hour London gap — 0.5–3 mg of melatonin at Buenos Aires bedtime (UTC-3) pulls the clock faster in 3–4 nights. Clear Argentina dosing with a clinician first.

Near-4am wakings are part of night one in Buenos Aires (25 m, UTC-3); stay dark and still, skip the clock-checking, and Argentina nights settle by the third. Practical baseline: lights out in a dark 16–20°C Buenos Aires room (25 m, UTC-3), and no evening alcohol for the first two nights while the Argentina clock settles.