Cathay Pacific will offer extra capacity from the UK to Hong Kong and additional onward connections to Australia from October.
The Hong Kong-based carrier will switch one of its four daily services from Heathrow on to a Boeing 747-400, offering an additional 136 seats a day. The service is currently operated by an Airbus A340.
Cathay will also offer extra seats from Amsterdam as it switches capacity from the US, where demand is falling. The airline will suspend one of its three daily Los Angeles-Hong Kong services for a year.
There will be an additional nine connections to Sydney and Brisbane from Hong Kong.
The schedule changes come a week after Cathay Pacific reported its first loss in five years, with chairman Christopher Pratt warning the airline industry would “not survive in its current form”.
Cathay lost HK$663 million (£47 million) in the first six months of the year compared with a profit of HK$2.5 billion (£167 million) in the same period a year ago.