Cheapest return flights from Seattle to Sofia in August from $519

AirHint found the following cheapest return flights from Seattle (SEA) to Sofia (SOF) in August 2026 (see full year).

Return flights

04 Aug - 04 Sep KLM
05 Aug - 05 Sep Lufthansa

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

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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.

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