Cheapest return flights from Washington to Sofia in May from $601

AirHint found the following cheapest return flights from Washington (IAD) to Sofia (SOF) in May 2026 (see full year).

Return flights

17 May - 31 May Lufthansa
01 May - 08 May Turkish Airlines
14 May - 28 May SWISS
04 May - 11 May United
07 May - 14 May United
01 May - 09 May Turkish Airlines
01 May - 10 May Lufthansa
02 May - 09 May Lufthansa
10 May - 17 May United

Also check the deals for one-way flights from Washington to Sofia in May.

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