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

Return flights

23 Sep - 27 Sep	VietJet Air
21 Sep - 28 Sep	Thai AirAsia X
21 Sep - 26 Sep	Thai AirAsia X
01 Sep - 04 Sep	VietJet Air
01 Sep - 05 Sep	VietJet Air
26 Sep - 03 Oct	Thai AirAsia X
01 Sep - 14 Sep	SpiceJet
03 Sep - 06 Sep	SpiceJet
15 Sep - 13 Oct	Thai AirAsia X
19 Sep - 17 Oct	VietJet Air
15 Sep - 21 Sep	Thai AirAsia X
02 Sep - 09 Sep	Air India
21 Sep - 26 Sep	Vietnam Airlines	direct
17 Sep - 02 Oct	SpiceJet
29 Sep - 11 Oct	Akasa Air
29 Sep - 02 Oct	Akasa Air
30 Sep - 11 Oct	SpiceJet
30 Sep - 09 Oct	SpiceJet
28 Sep - 07 Oct	SpiceJet
25 Sep - 02 Oct	SpiceJet

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 $251

Return flights