AirHint found the following cheapest return flights from Barcelona (BCN) to Hanoi (HAN) in September 2025 (see full year).

Return flights

25 Sep - 10 Oct	Air China
27 Sep - 24 Oct	Air China
18 Sep - 08 Oct	Air China
16 Sep - 01 Oct	Air China
18 Sep - 01 Oct	Air China
16 Sep - 27 Oct	Air China
27 Sep - 12 Oct	Air China
27 Sep - 11 Oct	Air China
29 Sep - 14 Oct	Shenzhen Airlines
29 Sep - 12 Oct	Shenzhen Airlines
16 Sep - 24 Sep	Air China
16 Sep - 22 Sep	Air China
17 Sep - 29 Sep	Ryanair
20 Sep - 29 Sep	Vueling Airlines
16 Sep - 23 Sep	Ryanair
16 Sep - 27 Sep	Ryanair
17 Sep - 22 Sep	Ryanair
25 Sep - 29 Sep	Air China
15 Sep - 22 Sep	Air China
17 Sep - 24 Sep	Ryanair

Also check the deals for one-way flights from Barcelona to Hanoi in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Barcelona to Hanoi in September from 491€

Return flights