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

Return flights

03 Sep - 08 Oct	Pegasus Airlines
04 Sep - 20 Sep	Pegasus Airlines
02 Sep - 25 Sep	Pegasus Airlines
01 Sep - 20 Oct	Turkish Airlines
05 Sep - 20 Sep	Pegasus Airlines
05 Sep - 21 Sep	Pegasus Airlines
09 Sep - 11 Oct	Turkish Airlines
03 Sep - 09 Oct	Pegasus Airlines
07 Sep - 28 Oct	Condor
02 Sep - 28 Oct	Pegasus Airlines
11 Sep - 07 Oct	AJet
11 Sep - 05 Oct	AJet
16 Sep - 20 Oct	Turkish Airlines
19 Sep - 27 Oct	Pegasus Airlines
01 Sep - 12 Sep	Pegasus Airlines
03 Sep - 10 Sep	Pegasus Airlines
08 Sep - 20 Sep	Thai Airways
11 Sep - 18 Sep	Thai Airways
08 Sep - 23 Sep	Thai Airways
06 Sep - 17 Sep	Air India

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 531€

Return flights