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

Return flights

11 Sep - 18 Sep	AJet
15 Sep - 29 Sep	AJet
10 Sep - 15 Sep	AJet
26 Sep - 03 Oct	AJet
23 Sep - 13 Oct	AJet
27 Sep - 08 Oct	AJet
27 Sep - 04 Oct	AJet
25 Sep - 03 Oct	AJet
23 Sep - 01 Oct	AJet
11 Sep - 17 Sep	AJet
16 Sep - 27 Sep	AJet
19 Sep - 28 Sep	AJet
12 Sep - 16 Sep	AJet
18 Sep - 25 Sep	AJet
11 Sep - 21 Sep	AJet
11 Sep - 13 Sep	AJet
22 Sep - 10 Oct	Royal Jordanian
30 Sep - 25 Oct	AJet

Also check the deals for one-way flights from Riyadh 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 Riyadh to London in September from 217€

Return flights