777-300ER vs 777-9 (777X)
777-300ER and 777-9 (777X) are closely matched, each topping 1 of 7 metrics.
Cross-shopping the Boeing Commercial Airplanes 777-300ER (introduced 2003) against the Boeing Commercial Airplanes 777-9 (777X) (introduced 2026) is a common decision, and the two sit closer on paper than the badges suggest. Both are commercial, which makes them natural cross-shopping rivals. On paper they are closely matched, so the decision usually turns on cabin, economics and availability. Below we compare them spec by spec, then break down which aircraft suits which mission.
6 more specs per aircraft — ceiling, climb, cabin, dimensions and more — are free with an account.
777-300ER vs 777-9 (777X): the key differences
- The 777-300ER delivers 1% more range (777-300ER: 7,370 nm; 777-9 (777X): 7,285 nm).
- The 777-300ER and 777-9 (777X) are evenly matched on cruise speed, both at 488 kt.
- The 777-9 (777X) delivers 8% more passenger capacity (777-300ER: 396 seats; 777-9 (777X): 426 seats).
- The 777-9 (777X) is the newer design (introduced 2026 versus 2003 for the 777-300ER), a gap of 23 years that usually shows up in avionics, cabin systems and fuel burn.
Which mission suits which aircraft
Both aircraft are built for nonstop ultra-long-haul routes, so outright range rarely separates them — the call leans on cabin (the 777-9 (777X) seats more), trip economics and what is actually available on the market. Match the airframe to how you fly most weeks, not to the headline range figure.
Which should you choose?
Choose the 777-300ER when nonstop range is the deciding factor, and the 777-9 (777X) when cabin capacity and payload matter more; the 777-300ER holds the cruise-speed edge. The right answer ultimately depends on acquisition cost, maintenance-program status, and what is actually available on the market — talk to our acquisition advisory team to pressure-test the choice against your missions and budget.
More comparisons
777-300ER vs 777-9 (777X): FAQs
Which has the longer range, the 777-300ER or the 777-9 (777X)?
The 777-300ER has the longer published range — 7,370 nm versus 7,285 nm for the 777-9 (777X).
Does the 777-300ER or 777-9 (777X) seat more passengers?
The 777-9 (777X) carries more passengers at maximum configuration — up to 426 seats, compared with 396 on the 777-300ER.
Which is newer, the 777-300ER or the 777-9 (777X)?
The 777-9 (777X) is the newer design, introduced in 2026 versus 2003 for the 777-300ER.
Should I buy the 777-300ER or the 777-9 (777X)?
Choose the 777-300ER when nonstop range is the deciding factor, and the 777-9 (777X) when cabin capacity and payload matter more; the 777-300ER holds the cruise-speed edge. The right answer ultimately depends on acquisition cost, maintenance-program status, and what is actually available on the market — talk to our acquisition advisory team to pressure-test the choice against your missions and budget.
Still weighing up the 777-300ER vs 777-9 (777X)?
Specs only take you so far. Our advisors give an independent recommendation based on your mission, budget and how you actually fly — and represent your side through to purchase.