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

Return flights

14 Sep - 30 Sep	AJet
13 Sep - 23 Sep	Pegasus Airlines
14 Sep - 22 Sep	AJet
09 Sep - 30 Sep	AJet
10 Sep - 23 Sep	AJet
08 Sep - 22 Sep	AJet
08 Sep - 02 Oct	AJet
13 Sep - 06 Oct	Pegasus Airlines
15 Sep - 06 Oct	AJet
11 Sep - 07 Oct	Pegasus Airlines
14 Sep - 06 Oct	AJet
17 Sep - 02 Oct	AJet
15 Sep - 10 Oct	AJet
11 Sep - 18 Sep	AJet
11 Sep - 28 Sep	Pegasus Airlines
09 Sep - 25 Sep	AJet
11 Sep - 25 Sep	AJet
15 Sep - 05 Oct	AJet
18 Sep - 05 Oct	Pegasus Airlines
18 Sep - 07 Oct	AJet

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Kathmandu in September from 587€

Return flights