AirHint found the following cheapest return flights from Boston (BOS) to Sofia (SOF) in July 2026 (see full year).
Return flights
| 14 Jul - 21 Jul | SWISS | ||
| 31 Jul - 30 Aug | KLM | ||
| 14 Jul - 07 Aug | SWISS | ||
| 17 Jul - 26 Jul | Lufthansa | ||
| 05 Jul - 01 Aug | Lufthansa |
Also check the deals for one-way flights from Boston to Sofia in July.
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