AirHint found the following cheapest one-way flights from London (LHR) to Riyadh (RUH) in September 2025 (see full year).

One-Way flights

10 Sep	Eurowings
17 Sep	Eurowings
18 Sep	Eurowings
23 Sep	British Airways
24 Sep	Eurowings
15 Sep	Scandinavian Airlines
01 Sep	Vueling Airlines
13 Sep	Air Serbia
20 Sep	Air Serbia
19 Sep	British Airways

Also check the deals for return flights from London to Riyadh 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 London to Riyadh in September from $237

One-Way flights