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

Return flights

19 Sep - 26 Sep	Biman Bangladesh Airlines
01 Sep - 23 Sep	Jazeera Airways
08 Sep - 29 Sep	IndiGo
07 Sep - 30 Sep	IndiGo
08 Sep - 01 Oct	IndiGo
08 Sep - 30 Sep	IndiGo
04 Sep - 22 Sep	IndiGo
09 Sep - 30 Sep	SalamAir
05 Sep - 21 Sep	IndiGo
05 Sep - 20 Sep	IndiGo
05 Sep - 19 Sep	IndiGo
01 Sep - 25 Oct	Biman Bangladesh Airlines
10 Sep - 01 Oct	Air India
10 Sep - 25 Oct	Biman Bangladesh Airlines
09 Sep - 10 Oct	IndiGo
15 Sep - 18 Oct	Biman Bangladesh Airlines
05 Sep - 16 Oct	Etihad Airways
05 Sep - 17 Oct	Etihad Airways
08 Sep - 22 Oct	Flynas
06 Sep - 06 Oct	Air Arabia

Also check the deals for one-way flights from Riyadh 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 Riyadh to Kathmandu in September from 333€

Return flights