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

Return flights

04 Dec - 07 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
30 Dec - 05 Jan	KLM
18 Dec - 21 Dec	Air France
22 Dec - 28 Dec	KLM
04 Dec - 07 Dec	Lufthansa	direct
11 Dec - 14 Dec	Lufthansa	direct
18 Dec - 21 Dec	Lufthansa	direct
30 Dec - 04 Jan	KLM
27 Dec - 31 Dec	KLM
30 Dec - 03 Jan	KLM
30 Dec - 04 Jan	Lufthansa	direct
30 Dec - 03 Jan	Lufthansa	direct
22 Dec - 28 Dec	Lufthansa	direct
30 Dec - 05 Jan	Lufthansa	direct

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

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 December from $214

Return flights