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

Return flights

25 Aug - 26 Aug	Ryanair
19 Aug - 26 Aug	Ryanair
20 Aug - 23 Aug	Ryanair
26 Aug - 27 Aug	Ryanair
18 Aug - 25 Aug	Ryanair
26 Aug - 30 Aug	Ryanair
18 Aug - 21 Aug	Ryanair
06 Aug - 13 Aug	Ryanair
29 Aug - 05 Sep	Ryanair
23 Aug - 25 Aug	Ryanair
26 Aug - 28 Aug	Ryanair
30 Aug - 03 Sep	Ryanair
28 Aug - 09 Sep	Ryanair
28 Aug - 03 Sep	Ryanair
28 Aug - 04 Sep	Ryanair
29 Aug - 01 Sep	Ryanair
28 Aug - 01 Sep	Ryanair
29 Aug - 14 Sep	Ryanair

Also check the deals for one-way flights from Warsaw 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 Warsaw to Oslo in August from $256

Return flights