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

Return flights

02 Sep - 09 Sep	Ryanair
30 Sep - 07 Oct	Wizz Air
09 Sep - 05 Oct	Wizz Air
06 Sep - 14 Sep	Ryanair
10 Sep - 04 Oct	Wizz Air
13 Sep - 20 Sep	Ryanair
13 Sep - 27 Sep	Ryanair
02 Sep - 01 Oct	Wizz Air
15 Sep - 30 Sep	LOT
10 Sep - 15 Oct	Wizz Air
10 Sep - 17 Sep	Wizz Air
15 Sep - 03 Oct	Wizz Air
10 Sep - 18 Sep	Wizz Air
28 Sep - 30 Sep	Air Arabia
08 Sep - 15 Sep	Ryanair
12 Sep - 14 Sep	Ryanair
24 Sep - 03 Oct	Air Arabia
29 Sep - 14 Oct	Wizz Air
30 Sep - 12 Oct	Wizz Air
08 Sep - 05 Oct	Air Arabia

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 $697

Return flights