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

Return flights

07 Sep - 20 Sep	Air Arabia
04 Sep - 24 Sep	Air Arabia
08 Sep - 05 Oct	Air Arabia
29 Sep - 13 Oct	Wizz Air
29 Sep - 11 Oct	Wizz Air
29 Sep - 12 Oct	Wizz Air
15 Sep - 27 Sep	Air Arabia
29 Sep - 15 Oct	Air Arabia
15 Sep - 03 Oct	Air Arabia
18 Sep - 22 Sep	Air Arabia
13 Sep - 27 Sep	Air Arabia
05 Sep - 22 Sep	Air Arabia
25 Sep - 30 Sep	Air Arabia
20 Sep - 10 Oct	Air Arabia
07 Sep - 16 Sep	Air Arabia
28 Sep - 12 Oct	Wizz Air
26 Sep - 05 Oct	Air Arabia
28 Sep - 11 Oct	Air Arabia
07 Sep - 25 Sep	Air Arabia
07 Sep - 08 Sep	Ryanair

Also check the deals for one-way flights from Warsaw 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 Warsaw to Kathmandu in September from 535€

Return flights