AirHint found the following cheapest return flights from Graz (GRZ) to London (LGW) in September 2025 (see full year).

Return flights

25 Sep - 29 Sep	Eurowings
16 Sep - 18 Sep	Pegasus Airlines
22 Sep - 24 Sep	Austrian Airlines
12 Sep - 16 Sep	Pegasus Airlines
12 Sep - 18 Sep	Pegasus Airlines
10 Sep - 22 Oct	SWISS
19 Sep - 23 Sep	Austrian Airlines
23 Sep - 26 Sep	Austrian Airlines
19 Sep - 21 Sep	Lufthansa
05 Sep - 07 Sep	Austrian Airlines
06 Sep - 09 Sep	Austrian Airlines

Also check the deals for one-way flights from Graz 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Graz to London in September from 259€

Return flights