AirHint found the following cheapest return flights from London (LCY) to Oslo (OSL) in March 2026 (see full year).

Return flights

10 Mar - 17 Mar	KLM
02 Mar - 05 Mar	KLM
07 Mar - 10 Mar	KLM
06 Mar - 10 Mar	KLM
10 Mar - 18 Mar	KLM
21 Mar - 22 Mar	KLM
11 Mar - 18 Mar	KLM
06 Mar - 13 Mar	KLM
20 Mar - 22 Mar	KLM
07 Mar - 11 Mar	KLM
23 Mar - 04 Apr	KLM
31 Mar - 07 Apr	KLM
07 Mar - 01 Apr	KLM
31 Mar - 04 Apr	KLM
18 Mar - 03 Apr	KLM
26 Mar - 03 Apr	Lufthansa
30 Mar - 02 Apr	KLM
30 Mar - 05 Apr	KLM
30 Mar - 04 Apr	KLM
30 Mar - 06 Apr	KLM

Also check the deals for one-way flights from London to Oslo in March.

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 March from $227

Return flights