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

Return flights

05 Dec - 08 Dec	Spirit Airlines
03 Dec - 13 Dec	Icelandair
05 Dec - 10 Dec	Frontier Airlines
12 Dec - 16 Dec	Frontier Airlines
03 Dec - 09 Dec	Scandinavian Airlines
10 Dec - 14 Dec	Icelandair
03 Dec - 15 Dec	jetBlue
10 Dec - 17 Dec	jetBlue
05 Dec - 09 Dec	jetBlue
08 Dec - 15 Dec	Icelandair
30 Dec - 24 Jan	jetBlue
31 Dec - 07 Jan	jetBlue
17 Dec - 10 Jan	jetBlue
15 Dec - 10 Jan	jetBlue
27 Dec - 10 Jan	Spirit Airlines
16 Dec - 16 Jan	jetBlue
16 Dec - 10 Jan	jetBlue
14 Dec - 06 Jan	Frontier Airlines
24 Dec - 17 Jan	jetBlue
30 Dec - 24 Jan	British Airways	direct

Also check the deals for one-way flights from Raleigh-durham to London in December.

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 December from $543

Return flights