Cathay Pacific will suspend its daily service between Hong Kong and Doha from February 15.
The airline blamed "commercial reasons" for its decision to discontinue the route, which launched in March last year (see news, February 2014).
Outbound service CX645 will depart Hong Kong for the final time on February 14, with return leg CX640 operating its last flight the next day.
Cathay and its Oneworld partner Qatar Airways began a strategic agreement on flights between Hong Kong and Doha in March 2014. The deal allowed pasengers of both airlines to earn and redeem frequent flyer points or miles.
Today, Qatar Airways announced it will resume the operation of both daily services between Hong Kong and Doha from February 16, meaning the Gulf carrier will effectively monopolise the route.
QR said in a statement: "The operating carrier change will have minimum impact on passengers who are booked on Cathay Pacific-operated flights from Hong Kong to Doha after February 15. Affected passengers will be re-accommodated on the Qatar Airways-operated flight due to operate on the same schedule."
While Cathay's CX code will remain on Qatar Airways flights between Doha and Hong Kong, it will be removed from QR services from Doha to other destinations from Feburary 15.
Qatar Airways will keep its QR code on "selected Cathay Pacific flights from Hong Kong to Australia, New Zealand, Korea and Japan".
Cathay said it "remains committed to serving the Middle East market and we will continue to identify opportunities to strengthen its services to and from the region".