AirHint found the following cheapest return flights from Boston (BOS) to Karachi (KHI) in December 2025 (see full year).
Return flights
| 24 Dec - 14 Jan | Icelandair | ||
| 23 Dec - 14 Jan | Emirates | ||
| 18 Dec - 27 Jan | KLM | ||
| 22 Dec - 29 Jan | Emirates | ||
| 06 Dec - 05 Jan | TAP | ||
| 16 Dec - 08 Jan | Brussels Airlines | ||
| 26 Dec - 31 Dec | Etihad Airways |
Also check the deals for one-way flights from Boston to Karachi in December.
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