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

Return flights

30 Jul - 06 Aug	Norwegian
30 Jul - 17 Aug	Norwegian	direct
30 Jul - 06 Aug	Norwegian	direct
27 Jul - 13 Aug	Norwegian
27 Jul - 03 Aug	Norwegian	direct
30 Jul - 10 Aug	Norwegian	direct
30 Jul - 13 Aug	Norwegian	direct
27 Jul - 13 Aug	Norwegian	direct
30 Jul - 03 Aug	Norwegian
30 Jul - 03 Aug	Norwegian	direct
28 Jul - 31 Jul	Scandinavian Airlines
27 Jul - 30 Jul	Norwegian	direct

Also check the deals for one-way flights from Oslo 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 Oslo to Sofia in July from 221€

Return flights