More flights have been announced by airlines of both countries amid stabilizing bilateral ties.
A 737 Max agreement would mark an important breakthrough for Boeing, after it lost its market lead in China to arch-rival Airbus.
China was the largest air travel market before COVID, accounting for a fifth of international travel within Asia Pacific and 6% globally.
The discounted prices were available for two hours on China Southern's app and other ticket-booking platforms.
All of the Top 10 largest city pairs in 2023 operate between 6 cities.
These agreements covered the procurement and maintenance of aircraft materials and engines, aviation fuel supply, in-flight catering, as well as the import of seafood and agricultural products.
13 destinations would be added to the two already being served by regular direct service.
The top 15 largest airlines entering the market since 2019 are mostly restructured or expanded existing carriers, with only 1 truly new entrant.