The Hong Kong-based carrier said the suspension was due to "commercial reasons" after it analyzed recent market conditions, South China Morning Post reported.
The airline said all affected passengers would be compensated with a free return ticket, according to The Straits Times.
It has operated the service since April 26 with one-way airfares starting from HK$480 (US$61).
Founded by Chinese property mogul Wong Cho Bau, who also owns the Shenzhen-headquartered Donghai Airlines, the carrier started flying in 2022.
It operates flights from Hong Kong to Asian destinations including Ho Chi Minh City and Tokyo, with a fleet of seven single-aisle Boeing 737-800 aircraft.
For Singaporeans, Hong Kong is famous as a food and shopping haven.