Due to multiple factors, expect to potentially pay more when booking in December. For low rates, November can be a great choice for travel to Patagonia. Flights to Patagonia from Hanoi in November are about 41,130,032₫ on average during November, but can be found for as low as 34,775,604₫.
A simple way to save on the total cost of your ticket is to fly from Hanoi to Patagonia in the morning. If you’re flexible enough to do this you can expect to save up to 114% on your trip compared to booking a flight in the morning.
When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Hanoi is roughly less than Aeropuerto Internacional Ezeiza/Ministro Pistarini. You can assume this to be the case over the next 14 days.
You can imagine temperatures to be in the 34 °C range in June. The weather in Aeropuerto Internacional Ezeiza/Ministro Pistarini is generally colder than Hanoi's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.