Cheapest return flights from Seattle to Sofia in December from $452

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

Return flights

31 Dec - 26 Jan Lufthansa
31 Dec - 25 Jan Austrian Airlines
31 Dec - 24 Jan Lufthansa
31 Dec - 22 Jan Lufthansa
05 Dec - 10 Dec Lufthansa
29 Dec - 20 Jan Air Canada
28 Dec - 22 Jan Air Canada
28 Dec - 20 Jan Air Canada
28 Dec - 18 Jan Lufthansa
28 Dec - 24 Jan Lufthansa
27 Dec - 20 Jan Lufthansa
02 Dec - 09 Dec WestJet
16 Dec - 29 Dec WestJet

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

Powered by

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Feel free to contact us with any feedback or request another flight research.