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

Return flights

12 Nov - 02 Dec	Turkish Airlines
13 Nov - 01 Dec	Turkish Airlines
12 Nov - 01 Dec	Turkish Airlines
15 Nov - 01 Dec	Turkish Airlines
14 Nov - 01 Dec	Turkish Airlines
07 Nov - 01 Dec	Turkish Airlines
20 Nov - 05 Dec	Emirates

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

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 November from $995

Return flights