Question : What day in the next four weeks has the best fares?
Answer : Since low prices are preferred, look at Mar 9th. As of Feb 20th, it's showing the cheapest ticket sales at $970. That is 77% below the average price for this route, so you can spend that extra cash on an adventure rather than the flight.
Question : Is the price you found a good deal?
Answer : Ranging anywhere from $838 to $5,214, prices for SAV to SGN do change much more than the majority of routes from the United States. The further out you book a route, the more likely you are to save.
Question : How long do most people stay in Ho Chi Minh City?
Answer : Of course you're not most people, but if you were, you'd stay roughly 20 days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : Saturday is your cheapest day to fly in March. Flexibility is paramount when booking travel plans in order to keep travel costs down.