We're 2 adults and a 5-year old from DC area and we will be travel to Vietnam in Dec-Jan. Ideally, we would like to arrive in a city (HCMC or Hanoi) and depart from the other city. We would like to find low cost airfare tickets but reasonable flight time and stop(s). If it make a good diff. we are open to fly out and/or back from NYC area. We have a family in NJ to stay overnight if it helps.

We appreciate to have your tips, suggestions, and info. Thanks!