Cheap first Flights: IAD to KTM in OctoberWashington, D.C. (IAD) → Kathmandu (KTM)Starting from $18280Flight Options & Prices:One-Stop Flights: From $20306 - Good value with one connectionMulti-Stop Flights: From $18280 - Cheapest option with multiple connectionsBook your first class flight from Washington, D.C. (IAD) to Kathmandu (KTM)and save money on your travel. Compare all flight options to find the best deal for your october trip.