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Airbus A330-300s make up 13% of the widebodies operating passenger flights, with 602 examples in service. That equates to 77% of the 777 A330-300s built over 28 years between 1992 and 2020.

Given that new widebodies are being delivered at a relatively glacial pace amid OEM ramp-up issues, the reliance on keeping older aircraft in service for even longer will increase as the decade continues. In February 2026, Cirium Ascend Consultancy noted that market values for the A330-300 had increased 20% since January 2025, while market lease rates were up 15%.

The outlook appears to brighter for the -300 than for its smaller sibling the -200. Just 6% of the passenger -300 fleet is stored, compared with 21% of the -200’s. The average age of the in-service passenger -300s is 14 years old. The 271 in-service passenger -200s have an average age of 16.

The increasing value of the A330-300 makes it a more worthwhile investment prospect, as it appears that many will remain operational well into the next decade.

In my analysis, I look at some of the airlines that have retrofitted their fleets of A330-300s over the past few years, and other airlines planning to update theirs soon.

Past Airbus A330-300 Retrofits

Cirium Ascend Ground Events data indicates that 57 Airbus A330-300s have been retrofitted with new cabins since March 2020.

Airlines’ ability to retrofit aircraft hinges on multiple factors, so installing the right interior products at the time of acquiring second-hand aircraft isn’t always possible.

Since 2019, Air Canada’s fleet of eight A330-300s has been supplemented with 12 second-hand examples, all originating from Singapore Airlines. Air Canada has operated the ex-SIA units for a long period with their inherited 285 seat dual-class configuration, prior to their being retrofitted with new business-class seats while premium-economy cabins were added. Ground Events data shows that 18 aircraft in the fleet have been retrofitted at four different locations across the USA, Hong Kong and Singapore.

Ground Events data shows that Delta Air Lines’ entire fleet of 31 A330-300s was retrofitted over a two-year period between May 2021 and May 2023, when premium-economy cabins were installed. Collins Aerospace MiQ seats were added when 24 aircraft visited Aeroman in El Salvador. The other seven were retrofitted in-house by Delta TechOps at Minneapolis-Saint Paul.

Between 2021 and 2024, Finnair had its entire widebody fleet of A350-900s and A330-300s, totalling 26 aircraft, refreshed with the installation of new cabin products. The brand-new Airlounge seat from Collins Aerospace was central to the airline’s new business-class product, while premium economy was introduced and HAECO Vector seats debuted. Ground Events data shows that seven A330-300s were retrofitted by HAECO in Hong Kong between 2021 and 2023, while the eighth aircraft was updated a year later, during the second quarter of 2024, by Sabena Technics in Bordeaux, France.

Future Airbus A330-300 Retrofits

Several airlines have publicly announced plans to retrofit their fleets of A330-300s over the next few years, in some cases as a bridge to the delivery of brand-new replacements. In most cases, the upgrades will be focused on the premium cabins.

Following the recent installation of premium-economy cabins, Delta Air Lines’ latest business-class offering, the ‘Delta One’ suites, will also be retrofitted onto its oldest A330s. Cirium Ascend Fleets Analyzer shows that the average age of Delta’s A330-300s is 17 years, but this is skewed by the 21 Pratt & Whitney-powered aircraft that have an average age of 20 years old. Originally delivered between 2003 and 2007, to Northwest Airlines, the aircraft were acquired through that carrier’s merger with Delta in 2008.

Delta’s other widebody fleets featuring Delta One suites have Thompson Aero Seating Vantage and Vantage XL seats, from a mix of line-fit and retrofit installations.

It is not yet clear which MRO facility the A330-300s will visit, but Ground Events data shows that ST Engineering Aerospace recently retrofitted nine Delta A350-900s at its Paya Lebar location in Singapore, while all 21 Boeing 767-400ERs were retrofitted at Guangzhou, China.

Cathay Pacific also plans to refresh its A330-300s, with 20 set to undergo retrofit work starting in late 2026. Fleets Analyzer shows that of Cathay Pacific’s 43 A330-300s, 23 were manufactured between 2010 and 2015, and the other 20 between 2001 and 2007. The new ‘Aria Studio’ business-class product will be introduced alongside improvements to the economy and premium-economy cabins. Cathay’s A330-300s currently feature six different cabin configurations, per Fleets Analyzer. This retrofit project will allow the rejuvenated aircraft to be streamlined into one seat configuration.

This work is starting prior to the arrival of Cathay Pacific’s first A330neo. Fleets Analyzer shows that the airline has ordered 30 A330-900s and taken options on 30 more, with deliveries due from 2028.

The popularity of premium economy continues, with various airlines rolling the cabin out across their whole widebody fleets. Premium-economy cabins are being added to Swiss’s A330-300s, following the introduction in 2022 of the new cabin class on board its Boeing 777-300ERs. The retrofit of its 14 A330-300s will also add new cabin products, to match the brand-new A350-900s currently joining the fleet. Premium-economy seats manufactured by ZIM will sit alongside overhauled first, business and economy cabins with new seats and suites supplied by Collins, Stelia and Recaro, respectively.

In addition to Swiss, other Lufthansa Group airlines will also update their A330-300s in the coming years. Leisure-focused Discover Airlines is planning nose-to-tail upgrades, including new wi-fi from Starlink, as part of a group-wide deal to equip around 850 aircraft. Discover will also expand its fleet to 16 A330-300s, benefiting from the fleet rationalisation that Lufthansa Group is undertaking. Fleets Analyzer shows that the seven remaining Lufthansa A330-300s are all scheduled to be transferred in 2026-27, with five aircraft moving to Discover and the other two to Brussels Airlines. The Belgian carrier will also overhaul its fleet of A330-300s, upgrading all three cabins.

The Chinese Market’s Potential

Looking at the current in-service fleet, 20% of A330-300s are operated by airlines based in China. It appears that these aircraft have not undergone any significant alterations to their original interiors since delivery.

Fleets Analyzer shows that nine Chinese airlines operate 120 of the aircraft with an average age of 10.5 years old. Cirium Ascend Consultancy and other industry observers note that China has a dearth of widebody aircraft orders, relative to the size of the current in-service fleet that will need replacing in the coming years.

Fleets Analyzer shows that 41 widebody passenger aircraft are currently on order or under LOI for Chinese airlines. It is likely that some of the nation’s carriers will receive widebodies ordered by lessors.

The Increasing Value of the A330-300

Despite airlines’ rebuilding of their long-haul networks to pre-pandemic scale, the rate at which new widebodies are being delivered that can operate these routes remains be significantly lower than the 2010s. As evidenced by the examples above, airlines are investing in their legacy widebody fleets by retrofitting them with new interiors to extend their service lives before any brand-new replacement aircraft will be delivered.

Cirium provides aircraft OEMs, MRO and the aftermarket with independent aircraft intelligence, enabling them to reduce downtime, manage risk and act before the market moves. Discover more.

Attending Aircraft Interiors Expo in Hamburg?

Don’t miss Andrew Doyle present an in-depth analysis of fleet and market trends at CabinSpace Live alongside Gary Weissel, Managing Officer at Tronos Aviation Consulting, Wednesday 14 April from 09:30. Find out more and connect with the Cirium team.