Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ho Chi Minh City to Yaoqiang Intl as you normally would.
Ho Chi Minh City will have the same amount of rainfall in 1 compared to Jinan over the next 2 days.
Temperatures around the 35 °C's can be experienced in April. The weather in Jinan is colder than in Ho Chi Minh City. Plan for potential changes in flight availability as peak weather approaches in this location.