AirHint found the following cheapest return flights from Basel (BSL) to London (STN) in September 2026 (see full year).

Return flights

19 Sep - 24 Sep	Ryanair	direct
10 Sep - 24 Sep	Ryanair	direct
19 Sep - 05 Oct	Ryanair	direct
19 Sep - 08 Oct	Ryanair	direct
14 Sep - 24 Sep	Ryanair	direct
14 Sep - 05 Oct	Ryanair	direct
05 Sep - 24 Sep	Ryanair	direct
05 Sep - 07 Sep	Ryanair	direct
05 Sep - 10 Sep	Ryanair	direct
03 Sep - 24 Sep	Ryanair	direct
18 Sep - 23 Sep	Norwegian Air Sweden AOC
05 Sep - 20 Sep	Ryanair
10 Sep - 13 Sep	Ryanair

Also check the deals for one-way flights from Basel 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 Basel to London in September from 82€

Return flights