AirHint found the following cheapest return flights from Singapore (SIN) to Kathmandu (KTM) in May 2026 (see full year).

Return flights

15 May - 17 May	Air India
18 May - 26 May	Air India
21 May - 26 May	Air India
18 May - 31 May	Air India
22 May - 31 May	Air India
21 May - 28 May	Cathay Pacific
20 May - 03 Jun	Air India
06 May - 23 May	Thai Airways
17 May - 30 May	Thai Airways
18 May - 26 May	Singapore Airlines	direct
21 May - 26 May	Singapore Airlines	direct
20 May - 03 Jun	Singapore Airlines	direct

Also check the deals for one-way flights from Singapore to Kathmandu in May.

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 Kathmandu in May from $456

Return flights