AirHint found the following cheapest return flights from Washington (IAD) to Kathmandu (KTM) in December 2025 (see full year).
Return flights
| 25 Dec - 13 Jan | Lufthansa | ||
| 26 Dec - 17 Jan | SWISS | ||
| 28 Dec - 04 Jan | Qatar Airways | ||
| 25 Dec - 08 Jan | Lufthansa | ||
| 27 Dec - 13 Jan | Emirates | ||
| 25 Dec - 01 Jan | Austrian Airlines |
Also check the deals for one-way flights from Washington to Kathmandu in December.
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