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

Return flights

30 Aug - 14 Sep	Air India
15 Aug - 07 Sep	Air India
15 Aug - 04 Sep	Air India
18 Aug - 29 Aug	Air India
06 Aug - 13 Aug	Qatar Airways
18 Aug - 25 Aug	Emirates
15 Aug - 30 Aug	Air India
06 Aug - 22 Aug	Air India
04 Aug - 17 Aug	Cathay Pacific
05 Aug - 17 Aug	Cathay Pacific
07 Aug - 15 Aug	Air India
05 Aug - 14 Aug	Cathay Pacific
05 Aug - 15 Aug	Cathay Pacific
15 Aug - 06 Sep	Singapore Airlines

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

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 Washington to Kathmandu in August from $1294

Return flights