AirHint found the following cheapest one-way flights from Washington (IAD) to Kathmandu (KTM) in December 2025 (see full year).
One-Way flights
| 30 Dec | Saudia | ||
| 10 Dec | TAP | ||
| 08 Dec | Turkish Airlines | ||
| 15 Dec | TAP | ||
| 21 Dec | SWISS |
Also check the deals for return flights from Washington to Kathmandu in December.
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