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

Return flights

01 Sep - 02 Oct	Air Arabia
01 Sep - 15 Oct	Air India
04 Sep - 07 Oct	Air India
10 Sep - 14 Oct	Air India
12 Sep - 20 Sep	SalamAir
12 Sep - 19 Sep	SalamAir
04 Sep - 18 Sep	Air India Express
04 Sep - 09 Oct	Air India
07 Sep - 15 Sep	Air India Express
04 Sep - 12 Sep	Air India Express
11 Sep - 18 Sep	SalamAir
17 Sep - 21 Sep	Etihad Airways
04 Sep - 11 Sep	Air India Express
20 Sep - 30 Sep	Air India Express
19 Sep - 29 Oct	Oman Air
25 Sep - 31 Oct	SalamAir
25 Sep - 29 Oct	SalamAir
26 Sep - 31 Oct	Oman Air
20 Sep - 25 Oct	SalamAir

Also check the deals for one-way flights from Muscat to Kathmandu 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 Muscat to Kathmandu in September from $290

Return flights