AirHint found the following cheapest return flights from Washington (DCA) to Kathmandu (KTM) in September 2025 (see full year).
Return flights
| 12 Sep - 25 Sep | Korean Air | ||
| 30 Sep - 11 Oct | Qatar Airways | ||
| 10 Sep - 10 Oct | Qatar Airways | ||
| 24 Sep - 22 Oct | Cathay Pacific | ||
| 25 Sep - 10 Oct | Alaska Airlines |
Also check the deals for one-way flights from Washington 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.
Find us on social media