The best day to arrive at Da Nang is Wednesday and it would be best to avoid Friday, as prices are on average 136.37% higher than on Wednesday. (Average prices, based on 1520188 datapoints.)
The cheapest airline flying from Da Nang to Ho Chi Minh City is Air Kyrgyzstan. They are 65% cheaper than Vietnam Airlines. (Average prices, based on 200 datapoints.)
The best time to fly is at around 7. (Average prices, based on 2671 datapoints.)