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

Return flights

01 Jul - 08 Jul	Wizz Air
01 Jul - 05 Jul	Wizz Air
16 Jul - 21 Jul	Ryanair
17 Jul - 24 Jul	Ryanair
03 Jul - 10 Jul	Ryanair
26 Jul - 04 Aug	Ryanair
12 Jul - 21 Jul	Ryanair
24 Jul - 01 Aug	LOT
01 Jul - 10 Jul	Lufthansa
05 Jul - 14 Jul	Lufthansa
10 Jul - 20 Jul	Lufthansa
10 Jul - 21 Jul	Lufthansa

Also check the deals for one-way flights from Sofia to Keflavik 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 Sofia to Keflavik in July from $277

Return flights