Pilot sleep guide

FAA/EASA flight duty rules cap continuous duty. Long-haul crews use controlled rest in cruise and rotating bunk sleep.

Primary risks

Cumulative jet lag across multi-segment trips
Cognitive degradation in the WOCL (window of circadian low, 02:00–06:00)
Decision-making at top-of-descent after long duty periods

Circadian context

Commercial pilots face two overlapping circadian challenges: jet lag from time-zone crossings and shift-work disorder from early starts and late arrivals. The 02:00–06:00 window of circadian low (WOCL) is when reaction time is most degraded; long-haul flights are scheduled to position the most cognitively demanding phases (top of descent, approach, landing) outside this window where possible. Cumulative fatigue across a 28-day duty period correlates with reported incidents more strongly than any single duty length.

Chronotype fit

Larks tolerate pre-dawn report times and morning departures well; owls handle late arrivals and red-eyes better. Carrier scheduling rarely accommodates chronotype, but pilots who can self-select rotations (senior bidders) often gravitate toward chronotype-matched patterns over time. The data on chronotype and incident rate are limited but suggest forced cross-chronotype assignment elevates risk.

Not sure of your chronotype? Take the 10-question quiz.

Strategies that work

Pre-flight: align rest period with the destination night when possible.
Use controlled rest (CRC) per your operator’s SOPs — typically 40 min max.
Bright light therapy and small melatonin doses are common in long-haul rotations.
Track your duty over a rolling 28-day window, not just shift-by-shift.

Light and melatonin protocol

Long-haul protocols typically combine: bright light at the destination during local daytime, sunglasses on arrival if it is local night, low-dose melatonin (0.3–0.5 mg) 5 hours before target sleep at the destination, and pre-positioning bedtime by 1 hour per day starting 3 days before a major eastward flight. Carrier operational manuals vary in how much of this they formally recommend.

Nap protocol

Bunk sleep on long-haul: 90-minute blocks aligned with destination night beat fragmented short naps for cumulative recovery.

Post-shift recovery

FAA Part 117 caps cumulative duty and mandates rest periods. The biology is roughly aligned with the rules but not perfectly — 10 hours of rest after a transmeridian flight does not equal 10 hours of restorative sleep because circadian misalignment shortens consolidated sleep. Pilots returning from long-haul rotations typically need 2–3 days of consolidated home-base sleep before performance returns to baseline.

Frequently asked questions

Do pilots use sleep medication?

FAA/EASA rules restrict prescription sleep medication use in pilots; specific drugs and required wash-out periods are listed in operational manuals. Over-the-counter melatonin at low doses (0.3–0.5 mg) is generally permitted with usual caution. Cumulative fatigue management favours sleep timing and light protocols over pharmacology.

What is controlled rest in the cockpit?

Controlled rest (or cockpit rest) is a structured short sleep period — typically capped at 40 minutes — taken by one flight crew member during cruise, with handover and recovery time built in. Studies in airline operations show measurable reduction in approach-phase errors when controlled rest is properly implemented.

Why are long-haul pilots given hotel rooms with blackout curtains?

Daytime sleep at the destination after a transmeridian eastbound flight is biologically difficult — body temperature and cortisol both work against you. Blackout curtains, low room temperature, and earplugs together approximate the night-time conditions the circadian system expects, partially compensating.