Jet lag plan
Salvador is 3 hours behind Reykjavík. You're traveling west — the easier direction. Your body delays its clock.
About 8,691 km due south · approximately 11-hour non-stop flight · an ultra-long-haul flight.
The route from Reykjavík, Iceland to Salvador, Brazil covers roughly 8,691 kilometres in a due south direction. At standard jet cruise speed plus a one-hour allowance for taxi, climb, and descent, a non-stop flight takes about 11 hours. This route crosses the equator. The destination's season is reversed relative to the origin, which can amplify the perceived disorientation of jet lag — your body lands not just in a different clock but in a different daylight regime.
Reykjavík is in the subarctic zone. In summer the sun sets briefly or not at all; in winter daylight may drop below five hours. The season of travel changes light-based jet-lag protocols significantly. Salvador is in the tropics, so day length varies only slightly across the year. Light cues for the circadian system stay strong year-round.
Standard 09:00–18:00 working hours at both ends of this route overlap by approximately 6 hours. In Reykjavík that window runs 12:00 to 18:00; in Salvador it is 09:00 to 15:00. This is the realistic window for live meetings, customer calls, or pair work without forcing either end out of normal hours.
Neither city observes daylight saving time, so the hour offset on this route is fixed year-round. This makes recurring schedules and calendar invites with collaborators on the other end safer than for DST-observing pairs.
If you are a lark (morning type): Westward travel is the easier direction and larks usually feel close to baseline within 2 days. The risk for larks is overshooting: stay up later than you feel like at the destination for the first two nights to avoid waking before local sunrise.
If you are a night owl (evening type): Westward travel suits owls because the body prefers delaying over advancing. A 3-hour westward shift typically clears in 2 days. Stay outside in the evening light at the destination and avoid early-morning bright light for the first three days.
Not sure of your chronotype? Take the 10-question quiz.
The great-circle distance from Reykjavík to Salvador is about 8,691 kilometres. A typical non-stop flight takes around 11 hours at standard cruise speed; routes with connections add two to four hours.
Salvador is currently 3 hours behind Reykjavík. Neither city observes daylight saving time, so the hour offset on this route is fixed year-round. This makes recurring schedules and calendar invites with collaborators on the other end safer than for DST-observing pairs.
Westward travel — which this route is — is the easier direction. Your body delays its clock, which is closer to its natural tendency. Most travellers clear a 3-hour westward shift in 2 days.
For a 3-hour shift, 0.3 to 0.5 mg of melatonin taken three to five hours before target bedtime at the destination is the dose supported by the Cochrane review. Higher doses (3–5 mg) do not advance phase better and increase morning grogginess. Start one day before departure.
For a 3-hour shift, one or two days of one-hour pre-trip bedtime adjustment helps but is not essential.
Owls (evening types) recover faster on westward routes because the body prefers delaying over advancing. Larks may overshoot — they should stay up later than they feel like at the destination for the first two nights.