Cheapest return flights from London to Oslo in September from $238

Best time to book flights for London (LCY) to Oslo (OSL) flights at AirHint

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

Return flights

26 Sep - 29 Sep KLM
19 Sep - 20 Sep KLM
04 Sep - 09 Sep SWISS
09 Sep - 08 Oct SWISS
10 Sep - 17 Sep SWISS
06 Sep - 09 Sep KLM
04 Sep - 07 Sep KLM
03 Sep - 07 Sep KLM
09 Sep - 17 Sep SWISS
26 Sep - 30 Sep Lufthansa
05 Sep - 09 Sep Lufthansa
26 Sep - 18 Oct SWISS

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

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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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