Why This Airline Gives Pilots At Least 3 Horizontal Hours Of Sleep On Its Longest Flights

Published Oct 29, 2026, 8:00 PM EDT Passionate about promoting aviation, the beauty of flight and the science behind it, Antonio is an avid reader of aviation magazines and books, and he loves visiting airshows all over the world, taking photos and writing about airplanes and helicopters as well. He is currently based in Palermo, Sicily. One of the most surprising things about a Singapore Airlines ultra- long-haul flight is not something passengers can see. A second shift of crew is asleep above their heads while the cabin carries on as if nothing has changed. Trays are cleared, lights are dimmed, and somewhere behind a curtain, a person responsible for your safety is deliberately relaxing for work! The airline does not leave that to chance, either: its pilots are guaranteed at least three hours of sleep lying fully flat. That promise raises a question every nervous flyer eventually asks: who is actually in charge while the people in charge are asleep? The answer involves four pilots, 13 cabin crew, a hidden staircase, and a rulebook that treats rest like fuel. Stay with it, because the most surprising part is not the beds. It is the rule that decides how long each person can stay in them. Why Does One Flight Need Four Pilots And 13 Cabin Crew? Credit: L.Juliantoro | Shutterstock The short answer is arithmetic. A typical international flight carries two pilots and eight or nine flight attendants, but Singapore Airlines' SQ24 to John F. Kennedy International Airport (JFK) carries four pilots, two captains and two first officers, plus 13 cabin crew including the purser. That is four or five more flight attendants than a typical international flight, as reported by Cabincrew24. The cabin crew total can reach 14 on some sectors, including flights to Los Angeles, according to The Sydney Morning Herald. Either way, the headcount is only the visible part of the plan. The New York route covers roughly 9,537 miles (15,349 kilometers) and can take up to 19 hours and 15 minutes in the air, far beyond what a single set of pilots may fly under duty-time rules. Singapore Airlines has been here before, and it did not end well. The airline flew from Singapore Changi Airport to JFK from 2004 to 2013 with the four-engine Airbus A340-500, which burned about 25% more fuel per seat than today's aircraft, and the route was paused when fuel prices rose, per Cabincrew24. It returned in 2018 on the more fuel-efficient Airbus A350-900ULR, which carries about 43,600 gallons (165,000 liters) of fuel, roughly 6,300 gallons (24,000 liters) more than a standard Airbus A350-900. As we previously explained, efficient new-generation widebodies like the A350 changed what airlines could risk commercially on ultra-long missions. The airline took delivery of the first one on September 22, 2018, according to Singapore Airlines' own announcement. So the fuel problem was solved, and the economics suddenly worked better. But a jet that can stay airborne for 19 hours is useless if the people operating it cannot. Which leaves a stranger puzzle: on an aircraft where every pound is counted, where does a second shift of pilots and flight attendants actually lie down? Where Do The Off-Duty Crew Actually Sleep? Credit: Matheus Obst | Shutterstock Out of sight, and not in a passenger seat. According to Cabincrew24, the flight attendant rest area sits toward the back of the cabin, reached by a small staircase near the fourth set of exit doors, with eight bunks behind privacy curtains, closer to a small sleeper cabin on a train than to anything in a normal cabin. Pilots get a separate compartment above the forward business class cabin with two beds and an armchair, as noted by The Smart Local in its roundup of airline secrets. If you have ever noticed the ceiling dip lower over one part of business class on a long-haul jet, you were probably looking at someone's bedroom. Space on this aircraft is a precious commodity. As detailed in Singapore Airlines' announcement of the cabin layout, the A350-900ULR is restricted to 161 seats, 67 in business class and 94 in premium economy, with no economyor first class, because a standard economy class on such a long flight cannot be tolerated well by passengers, and weight has to be traded for fuel. Against that backdrop, the bunks are a deliberate exception. The airline chose to spend weight on sleep rather than revenue, which shows how seriously it takes rested crew. Every bunk displaces something that could have earned money, and Singapore Airlines decided that was a fair trade. Eight bunks for 13 flight attendants and two beds for four pilots. The math only works if nobody sleeps at the same time. So how long does each person actually get, and who decided on that number? How Many Hours Of Sleep Does Each Crew Member Get? Credit: Airbus Pilots receive at least two rest periods during the flight, one of them lasting about four hours or more, and at least three of those hours must be spent horizontal, according to The Sydney Morning Herald and Channel NewsAsia's explainer on pilot fatigue safeguards. Cabin crew receive roughly four to five hours of rest, depending on total duty time. A four-hour block is roughly a fifth of a 19-hour flight, so every minute counts. Those hours are not a courtesy. They are the plan, written into the roster before the aircraft ever leaves the gate. The horizontal requirement is the detail worth lingering on. NASA research found that onboard bunk rest during long-haul flights helped improve flight crews’ subsequent alertness and performance, supporting the use of dedicated sleeping facilities to manage fatigue. That matters because, as described by Frontiers in Environmental Health, these routes exceed 16 hours of flight time and can stretch to 22 hours of total duty. The same research summary describes scheduled in-flight rest in lie-flat bunks as the main tool for managing fatigue on these flights. In other words, the bed is the safety equipment. Four hours may seem modest on a duty day that can approach 24 hours, but the timing of each rest period matters. The crew cannot all disappear into the bunks at once, and some phases of the flight leave no room for anyone to rest. So how does Singapore Airlines keep the cabin running when part of the crew is asleep? Who Serves The Meals While Half The Crew Is Asleep? Credit: Sorbis | Shutterstock Everyone, at first. According to Cabincrew24, every crew member works the first meal service after takeoff. Once it ends, about half the cabin crew head to the bunks while the rest keep working, and the groups swap every two to three hours so a fresh team is always on the floor. The design is deliberate: the cabin never runs short-handed, and nobody goes through the whole flight without a real chance to sleep. Then everyone returns for the final service and stays seated for landing. The cockpit follows a simpler script. One pair of pilots flies while the other rests, and they swap partway through the cruise. Only two pilots sit at the controls at any one time, which is by design: the goal is steady coverage rather than a crowded flight deck. Passengers see none of this choreography; from row to row, the service looks seamless. The arrangement also explains the staffing sums. Two pairs of pilots and two shifts of cabin crew are not luxuries. They are the minimum for a nonstop flight this long to be safe, and they explain why the bunk count matters as much as the seat count. Phase Cabin crew Pilots Takeoff and first meal All crew working One pair flying Mid-flight About half resting, swapping every 2 to 3 hours Pairs swap partway through cruise Final service and landing All crew back on duty and seated for landing Two pilots at the controls Rotation solves the schedule, but sleep is only as good as the room it happens in, and a bunk is only as good as the aircraft around it. Did Airbus quietly design the A350 to help tired crews, or does the credit belong somewhere else? Is The A350 Itself Designed To Fight Fatigue? Credit: slvn_an | Shutterstock Partly, yes. According to Airbus, the A350's carbon-fiber airframe allows higher cabin humidity and a lower cabin altitude of about 5,900 feet (1,800 meters), which eases the dryness and strain of very long flights. Singapore Airlines adds that the cabin uses LED lighting capable of 16 million colors to simulate natural sunrise and sunset, a tool meant to help passengers and crew adjust their body clocks. It is a subtle touch, and easy to miss, but on a flight where a sunrise may happen twice, light is one of the few clocks the body trusts. Pilots notice the difference. As we previously reported, A350 crews describe feeling more alert at the end of a duty period, a benefit the report ties to the aircraft's composite fuselage and lower cabin altitude. The piece also frames the A350-900ULR variant as built for routes of up to 20 hours, such as Singapore to New York, which is precisely where alertness at the end of the day matters most. Those features help during the flight. But the sharpest damage to a body clock arrives afterward, when a crew that left Singapore at night lands in New York in the middle of the morning. What does the airline do about that, and will anyone else copy it? What Happens After Landing, And Will Others Copy This Model? Credit: Sorbis | Shutterstock | Simple Flying Singapore Airlines protects recovery as carefully as it protects sleep in the air. Pilots must have 48 hours off duty before departure and receive three days of layover rest in New York, according to Cabincrew24 and The Sydney Morning Herald. Crossing 12 time zones in one duty period throws the body clock out of sync, so these rosters build in longer layovers than shorter routes. Cabin crew follow a similar cycle, but with a shorter recovery window. Three days in New York is meant to give the body real time to catch up, not just a stopover between flights. The real test is whether competitors accept the same standard as flights grow longer. We also noted that Sydney to London is the next A350 route set to push these limits. Every airline that attempts it will have to answer Singapore Airlines' questions: how many crew, how many bunks, and how many hours flat? Singapore Airlines' A350-900ULR, with its 161 seats and eight crew bunks, has effectively written the first draft of that checklist. Researchers publishing in Frontiers in Environmental Health describe these operations as challenging because crews face long periods awake and limited sleep. Whether three horizontal hours becomes the industry benchmark, or stays, Singapore Airlines' own answer is the thing to watch as flights stretch towards 20 hours.