AirHint found the following cheapest return flights from Cincinnati (CVG) to London (LHR) in September 2025 (see full year).

Return flights

14 Sep - 25 Sep	Air Canada
10 Sep - 01 Oct	Air Canada
03 Sep - 24 Sep	Air Canada
30 Sep - 09 Oct	Air Canada
09 Sep - 16 Sep	Air Canada
03 Sep - 16 Sep	Air Canada
14 Sep - 24 Sep	American Airlines	direct
13 Sep - 26 Sep	Air Canada
23 Sep - 30 Sep	United
02 Sep - 09 Sep	United
21 Sep - 28 Sep	Air Canada
26 Sep - 06 Oct	British Airways
15 Sep - 26 Sep	Air Canada
26 Sep - 03 Oct	British Airways
29 Sep - 06 Oct	United
25 Sep - 04 Oct	Air Canada
26 Sep - 05 Oct	American Airlines
26 Sep - 05 Oct	British Airways	direct

Also check the deals for one-way flights from Cincinnati 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 Cincinnati to London in September from $641

Return flights