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

Return flights

12 Dec - 15 Dec	Ryanair
12 Dec - 14 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
28 Dec - 03 Jan	Ryanair
29 Dec - 03 Jan	Ryanair
26 Dec - 29 Dec	Ryanair
26 Dec - 04 Jan	Ryanair
12 Dec - 07 Jan	Ryanair
05 Dec - 07 Dec	Ryanair
04 Dec - 07 Dec	Ryanair
30 Dec - 02 Jan	Ryanair
24 Dec - 27 Dec	Ryanair
21 Dec - 27 Dec	Ryanair
22 Dec - 18 Jan	Ryanair
15 Dec - 22 Dec	Ryanair
29 Dec - 02 Jan	Ryanair
18 Dec - 22 Dec	Ryanair
20 Dec - 02 Jan	Ryanair
23 Dec - 02 Jan	Ryanair

Also check the deals for one-way flights from London 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 London to Oslo in December from 145€

Return flights