Boeing 777-9 (777X)

A widebody jet taxis to the gate, and suddenly the tips at both wing ends stand straight up: only one airliner in the world offers you that sight – the Boeing 777-9, better known by its program name, 777X. Here you’ll learn how to recognize it, how it differs from the 777-300ER, why it is years behind schedule and how you, as a spotter, can catch one of the first sightings.

What is the Boeing 777-9?

The 777-9 is the largest version of the 777X family, Boeing’s third generation of the long-haul twinjet. The program officially launched in November 2013 at the Dubai Airshow with orders and commitments for 259 aircraft. Lufthansa had already chosen the type in September 2013 and is thus one of the launch customers. The family also includes the shorter 777-8 and the 777-8F freighter, whose first deliveries are currently expected in 2028.

Technically, the 777-9 builds on the fuselage of the 777-300ER but is new in almost every other respect: the fuselage was stretched, the wing was redesigned from scratch in carbon-fiber composite, and the newly developed GE9X engines from GE Aerospace hang under the wings. Boeing carried over some cabin elements from the Dreamliner program: larger windows, higher humidity and a lower cabin pressure equivalent to an altitude of around 6,000 feet. Thinner sidewalls made the cabin about ten centimeters wider on the inside.

The first test aircraft, registration N779XW, made the first flight on January 25, 2020. It took off from Paine Field in Everett and landed at Boeing Field in Seattle after just under four hours. Final assembly takes place at the Boeing Everett factory, where the carbon-fiber wings are also built in a dedicated composite plant.

The folding wing: the feature that decides everything

The most spectacular detail of the 777-9 sits at the very end of the wing. In flight, the aircraft spans 71.8 meters – significantly more than any 777 before it. Hardly any airport can handle that much wingspan, because gates, taxiways and parking areas are designed for certain maximum dimensions. Boeing’s solution: the outer 3.5 meters or so of each wing can be folded up after landing. That reduces the wingspan on the ground to 64.8 meters – practically the same as the 777-300ER. This way, the 777-9 fits the same gates as its predecessor.

For the authorities, this was uncharted territory. Because existing certification rules had no provision for folding wingtips on airliners, the FAA published ten special conditions in 2018 specifically for it. They govern, among other things, how securely the tips must be locked, how they behave in crosswinds and how the crew is warned if something is wrong.

For you as a spotter, that means: when a 777-9 taxis to the gate or the runway, it is practically impossible to mix up. Shortly before takeoff the tips fold down, and after landing they fold up again. That exact moment is one of the most sought-after shots of the type – from the taxiway you often see the tips towering at an angle or vertically.

GE9X: the largest engine on any airliner

As with the 777-300ER, there is no engine choice on the 777-9. Every aircraft flies with two GE9X engines, the largest turbofan GE Aerospace has ever built. The fan measures around 3.4 meters in diameter – almost as much as the fuselage width of a short-haul jet like the Boeing 737-800. In November 2017, a GE9X reached around 134,300 pounds of thrust on the test stand in Peebles (Ohio), setting a record.

The engine was also one of the causes of the delays: in 2019, a compressor problem pushed the first flight into 2020, and at the end of 2022 Boeing paused testing again because of an engine issue. In early 2026, GE discovered a durability problem with a seal, which has since been redesigned. GE expects that this won’t endanger the targeted 2027 entry into airline service.

Visually, you recognize the GE9X by its enormously thick, smooth nacelles. Compared with the GE90 of the 777-300ER, they look slightly bulkier, though the difference is hard to pin down with the naked eye. For identification, rely on the wing and the fuselage length instead.

The long history of delays

Originally, the first delivery to Lufthansa was planned for 2020. That didn’t happen – and the list of reasons is long:

Year	Event
2019	GE9X compressor problem, first flight slips to 2020; the fuselage for the structural test bursts during the load test in September
2020	First flight on January 25 in Everett
2021	First delivery postponed to the end of 2023; test aircraft N779XW visits Frankfurt in November
2022	Delivery postponed to 2025, testing pause due to engine problem
2024	Test fleet grounded from August after cracks in an engine mount component; delivery postponed to 2026
2025	Flight testing resumes in January, first delivery postponed to 2027
2026	In May, a 777-9 with a complete Lufthansa cabin flies for the first time; certification still not complete as of October

As of October 2026, the test fleet has flown several thousand hours according to industry reports, but certification is not yet complete. Important steps such as the ETOPS demonstrations for long-haul flights over water are still outstanding. Boeing and Lufthansa still speak of a first delivery in 2027 – given the history, though, you’re better off treating such dates as a target, not a firm commitment.

777-9, 777-300ER or A350-1000?

You’ll most often mix up the 777-9 with its predecessor. The table shows the key differences, plus the Airbus A350-1000 as a direct competitor that also has six wheels per landing gear leg.

Feature	777-300ER	777-9	A350-1000
ICAO type designator	B77W	B779	A35K
Wingtips	raked wingtips, fixed	long, slender, folded up on the ground	curved upward
Engines	GE90-115B	GE9X	Rolls-Royce Trent XWB
Length	73.9 m	76.7 m	around 74 m
Cockpit	classic Boeing windows	classic Boeing windows	black “mask”
Status	very common	test phase, airline service expected 2027	in airline service

In flight, telling the 777-300ER and 777-9 apart is hardest, because the tips are extended then. Look at the shape of the wing: the 777-9 has a visibly longer, more slender wing that flexes strongly upward under load. The wing ends taper to a point, without the distinctive angled-off raked wingtips of the 777-300ER. The fuselage also looks even more stretched. The A350-1000 gives itself away with its curved wingtips and the dark cockpit surround. You’ll find more basics on telling the two manufacturers apart in the guide Telling Airbus and Boeing apart.

For a sense of scale: at 76.7 meters, the 777-9 is longer than the Boeing 747-8 (around 76.3 meters) and the Airbus A380 (around 72.7 meters). Both four-engine jets are easy to tell apart, though, thanks to their upper deck and four engines. The overview The largest aircraft in the world shows which aircraft lead in length, wingspan and weight.

Who gets the 777-9?

The 777X program has collected several hundred orders; at the end of 2025 they stood at more than 600 aircraft from about a dozen customers, though individual airlines have adjusted their orders since. By far the largest customer is Emirates, which most recently increased its order again in November 2025. Other 777-9 customers include Qatar Airways, Singapore Airlines, Cathay Pacific, British Airways, ANA, Air India and Korean Air.

Lufthansa is expected to be the first operator. In May 2026, a 777-9 with a fully installed Lufthansa cabin flew for the first time. According to reports from summer 2026, the airline expects delivery in the first quarter of 2027 and airline service toward the end of the 2027 summer schedule. Reportedly, Lufthansa will likely base the aircraft in Frankfurt. Lufthansa belongs to the Lufthansa Group and is a founding member of Star Alliance.

Where to find the 777-9

As long as the 777-9 is not in airline service, you’ll need patience and a little luck. Realistically, there are three opportunities right now:

For Frankfurt, the Zeppelinheim viewing platform is a good choice, close to the approach axis of the southern runway. If you’re thinking internationally: at Myrtle Avenue near London Heathrow you have good chances once British Airways, Emirates or Qatar Airways deploy their 777-9 – Heathrow is served by numerous customers of the type. At the Munich Airport visitors’ hill, on the other hand, the 777-9 can’t be planned for the time being.

Test and ferry flights don’t show up in the schedule. Only tracking helps here: filter your flight tracker for the type code B779 and keep an eye on the US registrations of the test fleet – the first test aircraft, for example, flies as N779XW. How this works with ADS-B data is explained in the article on flight tracking with ADS-B. You’ll find more tips for hunting rarities under Spotting rare aircraft.

Photo tips specifically for the 777-9

An aircraft almost 77 meters long with a 72-meter wingspan is a challenge for any focal length. These points help you make the most of a rare encounter:

Which lenses suit big jets is explained in the guide to focal length for plane spotting. How to bring light and location together is covered in the article on sun position at the photo spot.

Common mix-ups and how to rule them out

Conclusion

The Boeing 777-9 is the most exciting new long-haul aircraft of the coming years – and a real rarity for spotters right now. Folding wingtips, a long carbon-fiber wing and the longest fuselage of any passenger jet make it unmistakable as soon as you see it on the ground. Until Lufthansa deploys the first aircraft in Frankfurt, airshows and test flights remain your best chances. You’ll find more on the family with the 777-200ER, the 777F freighter and the page on the manufacturer Boeing.