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

Return flights

23 Sep - 15 Oct	Air China
04 Sep - 18 Sep	Air China
06 Sep - 20 Sep	Air China
03 Sep - 17 Sep	Air China
05 Sep - 16 Sep	Air China
06 Sep - 16 Sep	Air China
19 Sep - 05 Oct	Sichuan Airlines
06 Sep - 17 Sep	Air China
14 Sep - 23 Sep	Air China
03 Sep - 22 Sep	Air China
04 Sep - 14 Sep	Air China
16 Sep - 23 Sep	Air China
20 Sep - 03 Oct	Air China
13 Sep - 03 Oct	Air China
26 Sep - 11 Oct	Sichuan Airlines
19 Sep - 13 Oct	Air China
19 Sep - 11 Oct	Air China
04 Sep - 02 Oct	Air China
20 Sep - 04 Oct	Air China
15 Sep - 01 Oct	Air China

Also check the deals for one-way flights from Madrid 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 Madrid to Hanoi in September from 539€

Return flights