AirHint found the following cheapest return flights from Washington (DCA) to Sofia (SOF) in October 2025 (see full year).
Return flights
| 28 Oct - 06 Nov | Air France | ||
| 27 Oct - 03 Nov | Air France | ||
| 25 Oct - 04 Nov | Air Canada | ||
| 31 Oct - 08 Nov | jetBlue | ||
| 30 Oct - 09 Nov | Air France |
Also check the deals for one-way flights from Washington to Sofia in October.
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