Paraguay Jet Lag Calculator

One useful constant: Asunción — and with it the Paraguay clock — stays pinned to UTC-4 for the whole trip. Two Paraguay specifics compound the shift: Asunción sits at 117 m (altitude makes poor sleep feel worse), and South America sits on the South America travel circuit most Paraguay itineraries follow.

The size of your Paraguay jet lag is the absolute gap between your home offset and Asunción's UTC-4. Reference frame for Paraguay: Asunción keeps UTC-4 and sits 117 m above sea level in South America, with that same offset in every season.

Dry cabin air quietly drains you on the way to Paraguay; an extra 500 ml of water per 3 hours in the air keeps the Asunción arrival day survivable. Each eastbound zone costs about one recovery day, each westbound zone about two-thirds of a day — so the London–Asunción leg (westbound, 4 hours) bills you about 2.7 days, while flying the opposite direction would cost only 4.

On arrival, anchor the new rhythm with an outdoor morning in Asunción and meals on Paraguay time from the first day. Applied to this South America trip: 4 hours west from London to Asunción maps to about 2.7 reset days, so a Paraguay itinerary should front-load outdoor time on days one to 3.

A 10-minute warm shower an hour before bed speeds the core-temperature drop that starts sleep — a real head-start on the first jangled Paraguay nights in Asunción. Cap naps at 20–30 minutes and finish them by 3pm Asunción time (UTC-4); anything longer steals the night that actually resets your clock to Paraguay.

Cool, dark and quiet wins in Paraguay: 16–20°C in the Asunción room, a proper mask against street glow, and no screens in the last hour before bed. Practical baseline: lights out in a dark 16–20°C Asunción room (117 m, UTC-4), and no evening alcohol for the first two nights while the Paraguay clock settles.