AirHint found the following cheapest return flights from Raleigh-durham (RDU) to London (LHR) in September 2025 (see full year).

Return flights

03 Sep - 08 Sep	Icelandair
06 Sep - 08 Sep	Icelandair
02 Sep - 09 Sep	Icelandair
04 Sep - 11 Sep	Icelandair
12 Sep - 19 Sep	Icelandair
09 Sep - 16 Sep	Frontier Airlines
03 Sep - 10 Sep	Icelandair
06 Sep - 09 Sep	Icelandair
10 Sep - 17 Sep	Air Canada
02 Sep - 10 Sep	Frontier Airlines
06 Sep - 08 Oct	Frontier Airlines
25 Sep - 02 Oct	United
26 Sep - 10 Oct	United
25 Sep - 02 Oct	British Airways	direct
26 Sep - 10 Oct	British Airways	direct
06 Sep - 08 Oct	British Airways	direct
28 Sep - 05 Oct	British Airways	direct
27 Sep - 11 Oct	Air Canada
26 Sep - 11 Oct	Air Canada
26 Sep - 11 Oct	British Airways	direct

Also check the deals for one-way flights from Raleigh-durham 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 Raleigh-durham to London in September from 486€

Return flights