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

Return flights

09 Jul - 25 Jul	SWISS
09 Jul - 23 Jul	SWISS
10 Jul - 15 Jul	KLM
10 Jul - 16 Jul	KLM
08 Jul - 16 Jul	KLM
08 Jul - 22 Jul	KLM
15 Jul - 29 Jul	KLM
09 Jul - 16 Jul	KLM
09 Jul - 22 Jul	SWISS
08 Jul - 15 Jul	KLM
30 Jul - 06 Aug	KLM
30 Jul - 08 Aug	KLM
31 Jul - 07 Aug	KLM
30 Jul - 04 Aug	KLM
28 Jul - 01 Aug	KLM
29 Jul - 01 Aug	KLM
29 Jul - 06 Aug	KLM
29 Jul - 05 Aug	KLM
24 Jul - 01 Aug	KLM
31 Jul - 10 Aug	KLM

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

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 July from $345

Return flights