Cheapest return flights from Washington to Kathmandu in September from 825€

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

Return flights

10 Sep - 24 Sep Etihad Airways
14 Sep - 05 Oct Etihad Airways
10 Sep - 15 Oct Air India
30 Sep - 30 Oct Etihad Airways
26 Sep - 27 Oct Air India
23 Sep - 08 Oct Turkish Airlines
26 Sep - 25 Oct Air India
07 Sep - 26 Oct Air India
24 Sep - 28 Oct IndiGo
28 Sep - 25 Oct IndiGo
27 Sep - 25 Oct IndiGo

Also check the deals for one-way flights from Washington to Kathmandu in September.

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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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