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

Return flights

15 Sep - 20 Sep	Spirit Airlines
11 Sep - 26 Sep	Spirit Airlines
12 Sep - 30 Sep	jetBlue
02 Sep - 09 Sep	jetBlue
15 Sep - 22 Sep	Frontier Airlines
11 Sep - 29 Sep	jetBlue
07 Sep - 14 Sep	jetBlue
15 Sep - 25 Sep	jetBlue
08 Sep - 14 Sep	Icelandair
23 Sep - 30 Sep	British Airways

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 $543

Return flights