AirHint found the following cheapest return flights from London (LON) to Xi'an (XIY) in September 2025 (see full year).

Return flights

28 Sep - 19 Oct	China Southern
21 Sep - 12 Oct	China Southern
26 Sep - 05 Oct	Air China
27 Sep - 03 Oct	China Southern
26 Sep - 26 Oct	Vueling Airlines
26 Sep - 05 Oct	Tianjin Airlines	direct
27 Sep - 01 Oct	Wizz Air
17 Sep - 26 Sep	Tianjin Airlines
17 Sep - 22 Sep	China Southern
21 Sep - 23 Sep	Pegasus Airlines
21 Sep - 28 Sep	Pegasus Airlines
20 Sep - 27 Sep	AJet
21 Sep - 28 Sep	Tianjin Airlines	direct
19 Sep - 28 Sep	China Eastern
19 Sep - 02 Oct	China Eastern
21 Sep - 26 Sep	China Southern

Also check the deals for one-way flights from London to Xi'an 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 London to Xi'an in September from $574

Return flights