AirHint found the following cheapest return flights from Kathmandu (KTM) to San Francisco (SFO) in December 2025 (see full year).
Return flights
| 12 Dec - 15 Jan | IndiGo | ||
| 20 Dec - 27 Dec | IndiGo | ||
| 05 Dec - 12 Dec | Thai Airways |
Also check the deals for one-way flights from Kathmandu to San Francisco in December.
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