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

Return flights

25 Sep - 02 Oct	VietJet Air
21 Sep - 25 Sep	VietJet Air	direct
09 Sep - 13 Sep	VietJet Air
21 Sep - 26 Sep	VietJet Air
23 Sep - 29 Sep	VietJet Air
21 Sep - 30 Sep	VietJet Air
01 Sep - 04 Sep	VietJet Air
11 Sep - 18 Sep	VietJet Air
10 Sep - 18 Sep	VietJet Air	direct
08 Sep - 13 Sep	VietJet Air
11 Sep - 16 Sep	VietJet Air
28 Sep - 07 Oct	IndiGo
28 Sep - 09 Oct	IndiGo
26 Sep - 12 Oct	VietJet Air
26 Sep - 02 Oct	IndiGo
14 Sep - 05 Oct	VietJet Air
26 Sep - 05 Oct	VietJet Air
26 Sep - 03 Oct	VietJet Air
26 Sep - 01 Oct	VietJet Air
28 Sep - 04 Oct	IndiGo

Also check the deals for one-way flights from Delhi 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 Delhi to Hanoi in September from $175

Return flights