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

Return flights

16 Sep - 23 Sep	IndiGo
18 Sep - 04 Oct	IndiGo
25 Sep - 29 Sep	IndiGo
23 Sep - 30 Sep	IndiGo
25 Sep - 09 Oct	IndiGo
18 Sep - 29 Sep	IndiGo
12 Sep - 28 Sep	IndiGo
04 Sep - 10 Sep	IndiGo
05 Sep - 18 Sep	IndiGo
12 Sep - 20 Sep	IndiGo
08 Sep - 13 Sep	IndiGo
11 Sep - 14 Sep	IndiGo

Also check the deals for one-way flights from Singapore to Muscat 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 Singapore to Muscat in September from 236€

Return flights