Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ngurah Rai to Buffalo as you normally would.
Expected rainfall in Denpasar is more than in Buffalo. You can expect this to be the case over the next 8 days.
Expect the weather to be around 32 °C on average in November. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Buffalo is generally colder than in Denpasar.