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

Return flights

01 Sep - 17 Sep	Air India
08 Sep - 22 Sep	Turkish Airlines
08 Sep - 28 Sep	Air India
23 Sep - 30 Sep	Air India
01 Sep - 08 Sep	Air India
30 Sep - 08 Oct	Turkish Airlines
30 Sep - 07 Oct	Air India
29 Sep - 24 Oct	Air India
24 Sep - 29 Oct	Turkish Airlines
25 Sep - 30 Oct	Air India
20 Sep - 27 Sep	Turkish Airlines
24 Sep - 17 Oct	Turkish Airlines
20 Sep - 25 Oct	Turkish Airlines
27 Sep - 25 Oct	Emirates

Also check the deals for one-way flights from Newark 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 Newark to Kathmandu in September from 934€

Return flights