1. Air Asia - Kuala Lumpur Malaysia
2. Cathay Pacific - Hong Kong
3. Emirates - Dubai
4. Qatar Airways - Doha
5. Singapore Airlines - Singapore
6. Thai Airways - Bangkok, Thailand
7. Asiana Airlines - Seoul, South Korea
8. China Southern Airlines - Various Cities in China
9. Japan Airlines - Tokyo, Japan
10. Korean Air - Seoul, South Korea.
American Airlines: A daily flight service premiered by American Airlines from New York City (Newark) to Hanoi; takes 9 hours 20 minutes.
Delta Air Lines: Besides, there are daily flights from Los Angeles (LAX) to Hanoi on Delta, each taking about 14 hours and with layovers in Atlanta (ATL) and Dallas/Fort Worth (DFW).
United Airlines: Flies daily United Airlines from San Francisco (SFO) to Hanoi with a stopover in Hong Kong, Tokyo, Bangkok, or Seoul; it's 8 hours long, with a possible transfer point in either Kuala Lumpur or Taipei.
Qantas: A flight of about 17 hours from Sydney to Hanoi, throughSingapore or throughDubai or through Singapore.
Singapore Airlines: Direct flights from Singapore to Hanoi; flight times are roughly 12 hours with layovers inMalaysia.
Etihad: Etihad operates a flight from London Heathrow to Abu Dhabi and an onward flight with a transfer through Ho Chi Minh City to Hanoi which connects throughSingapore.The round-trip journey lasts approximately 14 hours in total, Dubai time included.
British Airways: British Airways flies from London Heathrow (LHR) to Amsterdam (AMS) or Paris (CDG), connecting with flights to Hanoi via Frankfurt with a stopover in Frankfurt.The return journey takes about 15-16 hours, depending on the chosen route.