AirHint found the following cheapest return flights from Washington (IAD) to Sofia (SOF) in June 2025 (see full year).

Return flights

24 Jun - 18 Jul	Icelandair
24 Jun - 19 Jul	Icelandair
26 Jun - 29 Jun	Porter Airlines (Canada) Ltd
21 Jun - 11 Jul	Icelandair
25 Jun - 18 Jul	Icelandair
21 Jun - 12 Jul	Icelandair
25 Jun - 19 Jul	Icelandair
27 Jun - 20 Jul	ITA Airways
26 Jun - 19 Jul	Lufthansa

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

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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Cheapest return flights from Washington to Sofia in June from $1166

Return flights