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

One-Way flights

15 Sep	Ryanair	direct
22 Sep	Ryanair	direct
21 Sep	Ryanair	direct
20 Sep	Ryanair	direct
23 Sep	Ryanair	direct
17 Sep	Ryanair	direct
16 Sep	Ryanair	direct
25 Sep	Wizz Air
18 Sep	Ryanair
26 Sep	Wizz Air

Also check the deals for return flights from Oslo to London 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 Oslo to London in September from 30€

One-Way flights