British Airways will introduce what it called the world’s biggest business class on its upgraded double-decker Airbus SE A380 jets, targeting premium passengers as airlines rush to cash in on upscale travel.

IAG SA-owned British Airways will update its fleet of a dozen A380s with a new business class cabin spanning the entire upper deck of the aircraft, the airline said at an event in London on Monday. The first upgraded A380 is due to enter service in the coming months.

The carrier said it will also upgrade its first class seating with dividers that fold away, enabling the conversion of middle seats into larger cabins for passengers traveling together.

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The changes will reduce the number of seats on the A380 by 11 percent, from 469 seats to 417, with the bulk of the reduction coming at the expense of the economy class cabin. Economy berths will be reduced by about 30 percent to 215 seats.

“This is the largest single investment that any airline has ever made in reconfiguring an aircraft stretching from nose to tail and touching every single aspect of the experience on board,” British Airways Chief Executive Officer Sean Doyle said.

Retrofitting one aircraft takes about 100 days, he said, and the first upgrade A380 is due to enter service in the coming months.

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The decision to spend millions on transforming its fleet of A380s makes British Airways an industry outlier when rivals around the world are phasing out the four-engine behemoth for smaller, more fuel-efficient twin-engine jets. However, slot constraints at London’s Heathrow airport mean that the carrier can’t as easily replace the super jumbo with smaller aircraft.

US and European carriers have been pouring money into first- and business-class seating to target well-heeled passengers who are a resilient source of cash at a time when the war in Iran has caused jet fuel prices to soar, driving up costs. Air France-KLM’s La Premiere recently won an award for the world’s best first class in Skytrax’s annual airline rankings and has plans to expand the service to more US cities.

Across the Atlantic, Delta Air Lines Inc and United Airlines Holdings Inc have generated the majority of the industry’s profitability by catering to premium customers.

British Airways first unveiled its plans for the new A380 first class seating in November 2024, and had planned to launch the product in the middle of this year.