From Hanoi, there are international flights on China Southern Airlines, Vietnam Airlines and Thai Airways International to Shanghai:

By China Southern Airlines

From		To		Transit	Flight
City	Time	City	Time	Guangzhou	CZ 372
Hanoi	09:20	Shanghai	19:15

* Flight time and schedules may change, please check on actual date for the update.

By Vietnam Airlines

From		To		Transit
City	Time (local)	City	Time (local)	Guangzhou/ 790
Hanoi	11:05	Shanghai	13:55

* Flight time and schedules may change, please check on actual date for the update.

By Thai Airways International

From		To		Transit	Flight
City	Time	City	Time	Bang Kok	TG685
Hanoi	20:35	Shanghai	06:25+1 day(s)

* Flight time and schedules may change, please check on actual date for the update.

See also:

Return flight

Flights from Shanghai to Hanoi

Other flights from Hanoi

Flights from Hanoi to Beijing
Flights from Hanoi to GuangZhou

Flights from Ho Chi Minh City to China

Flights from Ho Chi Minh city to Beijing
Flights from Ho Chi Minh city to Guangzhou
Flights from Ho Chi Minh City to Nanning