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

Return flights

16 Sep - 30 Sep	Turkish Airlines
15 Sep - 12 Oct	Scoot
25 Sep - 02 Oct	Turkish Airlines
07 Sep - 22 Sep	Scoot
27 Sep - 18 Oct	Turkish Airlines
10 Sep - 20 Sep	Scoot
21 Sep - 05 Oct	Scoot
03 Sep - 05 Oct	Scoot
02 Sep - 06 Oct	Scoot
25 Sep - 14 Oct	Turkish Airlines
06 Sep - 05 Oct	Scoot
02 Sep - 05 Oct	Scoot
23 Sep - 30 Sep	Turkish Airlines
04 Sep - 05 Oct	Scoot
07 Sep - 21 Sep	Scoot
21 Sep - 27 Sep	Scoot
02 Sep - 23 Sep	Scoot
10 Sep - 25 Sep	Scoot
02 Sep - 12 Sep	Scoot
03 Sep - 25 Sep	Scoot

Also check the deals for one-way flights from Sydney 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 Sydney to London in September from 864€

Return flights