Hi! we would like to give you suggestions a-week Travel  Itinerary for 3 regions in Vietnam:

Northern Vietnam

Fly into Hanoi

• 2 nights – Hanoi
• 2 nights – Halong Bay or Bai Tu Long Bay
• 2 nights – Sapa
• Alternative to Sapa – 2 night in Hue Fly out of Hanoi

Central Vietnam

Fly into Hanoi or HCMC. Get a local flight down to Dong Hoi

• 3 nights – Phong Nha
• 2 nights – Hue
• 2-3 nights – Hoi An Fly out of Da Nang to either Hanoi or HCMC to leave

South Vietnam

Fly into Ho Chi Minh City

• 2 nights – Ho Chi Minh City
• 2 nights – Mekong Delta
• 2 nights – Dalat
• 1 night – Mui Ne Fly out of Ho Chi Minh City