Cheapest return flights from Boston to Sofia in December from $351

AirHint found the following cheapest return flights from Boston (BOS) to Sofia (SOF) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec Austrian Airlines
09 Dec - 23 Dec Austrian Airlines
31 Dec - 14 Jan SWISS
03 Dec - 10 Dec Air Canada
06 Dec - 13 Dec Aer Lingus
30 Dec - 06 Jan Austrian Airlines
13 Dec - 15 Dec Aer Lingus
28 Dec - 11 Jan Air Canada
15 Dec - 22 Dec KLM
27 Dec - 17 Jan KLM
12 Dec - 19 Dec Air France
24 Dec - 31 Dec jetBlue
17 Dec - 11 Jan Icelandair
19 Dec - 10 Jan Spirit Airlines
18 Dec - 25 Dec Spirit Airlines
22 Dec - 29 Dec Frontier Airlines
27 Dec - 04 Jan Brussels Airlines
14 Dec - 03 Jan Icelandair
27 Dec - 03 Jan Brussels Airlines
20 Dec - 02 Jan jetBlue

Also check the deals for one-way flights from Boston to Sofia in December.

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