Kids' clocks adjust faster than adults' but the days between are loud. Plan for the meltdown, not against it.
Shift bedtime 15–30 minutes per day for three days. Keep mornings predictable. Pack the comfort items associated with sleep at home.
Prefer flights overlapping destination night. Limit screens during destination-night hours. Small snacks and surprises every two hours.
At least 60 minutes of outdoor daylight on day one. Real meals at local times. Long pre-sleep wind-down: bath, dim lights, story.
Short nap (30–45 min) before 14:00 is fine. Anything after 15:00 will wreck the night.