Cheapest return flights from London to Oslo in September from $258

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

09 Sep - 13 Sep KLM
05 Sep - 08 Sep KLM
16 Sep - 20 Sep KLM
04 Sep - 08 Sep KLM
19 Sep - 21 Sep KLM
15 Sep - 21 Sep KLM
25 Sep - 28 Sep KLM
14 Sep - 19 Sep SWISS
14 Sep - 21 Sep SWISS

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

Skyscanner

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.

Book a cheap hotel in Oslo

Cheap car rent in Oslo