SINGAPORE— Singapore Airlines (SQ) operates the longest commercial flight in the world between Singapore Changi Airport (SIN) and New York John F. Kennedy International Airport (JFK), along with the second-longest route from Singapore (SIN) to Newark Liberty International Airport (EWR). Both services run daily, take over 18 hours, and use a special all-premium Airbus A350-900ULR.
These two routes beat the third-longest flight, Qatar Airways (QR) from Doha (DOH) to Auckland (AKL), by more than 400 NM (800 km). Singapore Airlines sells more premium seats to the New York area than to any other US destination, and it plans to refurbish these aircraft with larger business-class and first-class cabins, Simple Flying reported.


Inside Singapore Airlines’ Ultra-Long-Haul New York Operation
Singapore Airlines relaunched its nonstop service to Newark in 2018 with flights SQ21 and SQ22, operating the Airbus A350-900ULR.
This subvariant features software changes that increase usable fuel capacity, structural and aerodynamic improvements later applied to the standard A350-900, and a deactivated forward cargo hold. The route was suspended during the COVID-19 pandemic and restarted in 2022.
The flight to New York JFK, operated as SQ23 and SQ24, began during the COVID era to take advantage of strong cargo demand.
It originally used a standard Airbus A350-900 to maximize freight capacity, then switched to the A350-900ULR as passenger demand recovered. SQ24 departs Singapore at noon, while SQ22 departs for Newark after midnight. The return from JFK leaves in the evening, and the return from Newark departs in the morning.
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Cabin Layout And Premium Seating
Data from aeroLOPA shows that Singapore Airlines’ standard A350-900 carries 42 business class seats, 24 premium economy seats, and 187 economy seats, for a total of 253 seats.
The A350-900ULR is configured very differently, with 67 business class seats and 94 premium economy seats, for a total of 161 seats. These aircraft carry no economy cabin. Economy passengers traveling to JFK instead use Singapore’s one-stop Boeing 777 service via Frankfurt (FRA).


How Crew Staffing Works
Because these flights routinely last more than 18 hours, they exceed standard crew rest limits. Singapore Airlines staffs four pilots in the flight deck, consisting of two captains and two first officers. The cabin carries 13 flight attendants, including the purser.
Everyone is seated for taxi, takeoff, and landing, and only two pilots remain in the cockpit during cruise.
The two sets of pilots alternate, with one pair flying while the other rests. Flight attendants follow a similar pattern. The full crew works the initial meal service, after which some members move to the bunks while others continue working.
Flight attendants rotate every two to three hours so that everyone receives adequate rest, and the full crew works the final part of the flight.
Crew staffing remains relatively light for the world’s longest flight. The A350-900 is a modestly sized airliner, and Singapore Airlines’ A350-900ULRs are the least-dense A350s in the world with only 161 seats.
The carrier still maintains a large crew roster relative to seat count to deliver a high standard of service across its business and premium economy cabins.
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Where The Crew Sleeps
The Boeing 777 introduced crew rest areas in the aircraft’s crown space above the passenger cabin, which avoided blocking seats or reducing cargo room. This design carried over to the Boeing 787 and the Airbus A350. Smaller aircraft, such as the Airbus A330 and Boeing 767, cannot fit a crew rest area above the cabin.
On the A350, the crew rest bunks sit toward the rear of the cabin and are reached by a small staircase near the fourth set of exit doors. Flight attendants find eight beds there, though a six-bed option is also offered.
The area includes elevated beds with privacy curtains, and crew members can sleep, read, or use the aircraft Wi-Fi. Pilots use a separate rest area above the forward business class cabin, which has two beds and an armchair. Passengers can identify the pilot rest area by the lower ceiling above the business class section.


Route Distances And Flight Paths
By great circle distance, Singapore and New York JFK are 8,288 NM (15,349 km) apart, while Singapore and Newark are 8,285 NM (15,344 km) apart.
The Doha to Auckland route covers 7,848 NM (14,535 km), making the two Singapore routes significantly longer. Actual flight times vary with weather, but these flights can be scheduled for as long as 19 hours and 15 minutes.
The shortest path runs over the Arctic and Siberia, but with Russian airspace closed, Singapore Airlines typically routes SQ21 and SQ23 over the Atlantic, then over Europe, Central Asia, and South Asia. SQ22 and SQ24 usually fly to Singapore across the Pacific.
The A350-900ULR sacrifices payload for fuel capacity and rarely departs near its Maximum Takeoff Weight. Beginning in 2027, the aircraft will be retrofitted with four first-class seats, 70 business-class seats, and 58 premium economy seats.


Qantas And The Future World’s Longest Flight
Qantas (QF) will soon receive the Airbus A350-1000ULR, which adds an extra fuel tank and a higher MTOW.
As part of Project Sunrise, the aircraft will operate nonstop flights from Sydney (SYD) and Melbourne (MEL) to London Heathrow (LHR) and New York JFK, and it will also fly the existing Perth (PER) to London route. These four routes will surpass Singapore Airlines’ New York services by distance.
Unlike Singapore Airlines, Qantas will install economy seats with extra legroom. Each aircraft will carry 238 seats, made up of six first-class seats, 52 business-class seats, 40 premium economy seats, and 140 economy seats, making them the least-dense A350-1000 in the world.
The layout is more conventional than the all-premium cabins on Singapore Airlines’ A350-900ULRs, and Singapore Airlines’ New York operation will remain the most unique ultra-long-haul service even after Qantas takes the distance record.
| Origin | Destination | Airline | Aircraft | Distance (NM) | Distance (km) |
|---|---|---|---|---|---|
| Sydney | London Heathrow | Qantas | Airbus A350-1000ULR | 9,188 | 17,016 |
| Melbourne | London Heathrow | Qantas | Airbus A350-1000ULR | 9,127 | 16,904 |
| Melbourne | New York JFK | Qantas | Airbus A350-1000ULR | 9,015 | 16,695 |
| Sydney | New York JFK | Qantas | Airbus A350-1000ULR | 8,646 | 16,013 |
| Singapore | New York JFK | Singapore Airlines | Airbus A350-900ULR | 8,288 | 15,349 |
| Singapore | Newark | Singapore Airlines | Airbus A350-900ULR | 8,285 | 15,344 |
| Doha | Auckland | Qatar Airways | Boeing 777-200LR | 7,848 | 14,535 |
| Perth | London Heathrow | Qantas | Boeing 787-9 | 7,829 | 14,499 |
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