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

Return flights

22 Jul - 29 Jul	Lufthansa
29 Jul - 05 Aug	United
07 Jul - 21 Jul	Turkish Airlines
23 Jul - 30 Jul	United
25 Jul - 01 Aug	United
11 Jul - 17 Aug	Lufthansa
08 Jul - 30 Jul	SWISS
30 Jul - 10 Aug	Lufthansa
09 Jul - 16 Jul	United
15 Jul - 22 Jul	United
21 Jul - 28 Jul	United
17 Jul - 31 Jul	Turkish Airlines
17 Jul - 24 Jul	United
07 Jul - 14 Jul	United
31 Jul - 07 Aug	United
27 Jul - 03 Aug	United

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

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 July from $798

Return flights