AirHint found the following cheapest return flights from Olsztyn (SZY) to London (STN) in September 2025 (see full year).

Return flights

13 Sep - 24 Sep	Ryanair	direct
13 Sep - 17 Sep	Ryanair	direct
20 Sep - 24 Sep	Ryanair	direct
17 Sep - 24 Sep	Ryanair	direct
13 Sep - 20 Sep	Ryanair	direct
17 Sep - 20 Sep	Ryanair	direct
06 Sep - 10 Sep	Ryanair	direct
06 Sep - 24 Sep	Ryanair	direct
06 Sep - 17 Sep	Ryanair	direct
10 Sep - 14 Sep	Ryanair

Also check the deals for one-way flights from Olsztyn 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 return flights from Olsztyn to London in September from 56€

Return flights