AirHint found the following cheapest one-way flights from London (LHR) to Oslo (OSL) in September 2025 (see full year).

One-Way flights

27 Sep	British Airways	direct
20 Sep	British Airways	direct
29 Sep	Vueling Airlines
24 Sep	Scandinavian Airlines
23 Sep	Vueling Airlines
30 Sep	Scandinavian Airlines	direct
24 Sep	Scandinavian Airlines	direct
21 Sep	Vueling Airlines
23 Sep	Scandinavian Airlines	direct

Also check the deals for return flights from London to Oslo in September.

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 one-way flights from London to Oslo in September from $82

One-Way flights