AirHint found the following cheapest return flights from Lucknow (LKO) to Singapore (SIN) in September 2025 (see full year).

Return flights

19 Sep - 22 Sep	Air India
30 Sep - 19 Oct	AirAsia
30 Sep - 04 Oct	AirAsia
30 Sep - 15 Oct	AirAsia
18 Sep - 02 Oct	IndiGo
30 Sep - 02 Oct	AirAsia
18 Sep - 22 Sep	AirAsia
18 Sep - 04 Oct	AirAsia
19 Sep - 04 Oct	Thai AirAsia
30 Sep - 08 Oct	AirAsia
19 Sep - 02 Oct	Thai AirAsia
30 Sep - 16 Oct	AirAsia

Also check the deals for one-way flights from Lucknow to Singapore 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 Lucknow to Singapore in September from $244

Return flights