AirHint found the following cheapest return flights from Frankfurt (FRA) to Oslo (OSL) in August 2025 (see full year).

Return flights

19 Aug - 20 Aug	Ryanair
21 Aug - 07 Sep	Ryanair
20 Aug - 22 Aug	Ryanair
18 Aug - 20 Aug	Ryanair
23 Aug - 07 Sep	Ryanair
20 Aug - 24 Aug	Ryanair
12 Aug - 19 Aug	Ryanair
22 Aug - 07 Sep	Ryanair
28 Aug - 01 Sep	Ryanair
25 Aug - 28 Sep	Ryanair
17 Aug - 20 Aug	Ryanair
18 Aug - 27 Aug	Ryanair
21 Aug - 24 Aug	Ryanair
21 Aug - 25 Aug	Ryanair
24 Aug - 31 Aug	Ryanair
29 Aug - 01 Sep	Ryanair
23 Aug - 02 Sep	KLM
23 Aug - 02 Sep	Lufthansa	direct
29 Aug - 01 Sep	Lufthansa	direct
22 Aug - 07 Sep	Lufthansa	direct

Also check the deals for one-way flights from Frankfurt to Oslo in August.

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 Frankfurt to Oslo in August from 147€

Return flights