AirHint found the following cheapest return flights from Kathmandu (KTM) to Osaka (KIX) in December 2025 (see full year).

Return flights

08 Dec - 16 Dec	Thai AirAsia
08 Dec - 20 Dec	Thai AirAsia
08 Dec - 25 Dec	Thai AirAsia
07 Dec - 16 Dec	Thai AirAsia
08 Dec - 23 Dec	Thai AirAsia
07 Dec - 20 Dec	Thai AirAsia
07 Dec - 25 Dec	Thai AirAsia
14 Dec - 16 Dec	Thai AirAsia
08 Dec - 27 Dec	Thai AirAsia
14 Dec - 20 Dec	Thai AirAsia
31 Dec - 13 Jan	Thai AirAsia
31 Dec - 08 Jan	Thai AirAsia
14 Dec - 03 Jan	Thai AirAsia
31 Dec - 03 Jan	Thai AirAsia

Also check the deals for one-way flights from Kathmandu to Osaka in December.

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 Kathmandu to Osaka in December from 523€

Return flights