AirHint found the following cheapest return flights from Seattle (SEA) to London (LGW) in December 2024 (see full year).
28 Dec - 27 Jan | Icelandair | ||
25 Dec - 18 Jan | Icelandair | ||
25 Dec - 30 Dec | Air Tahiti Nui | ||
28 Dec - 04 Jan | Icelandair | ||
25 Dec - 01 Jan | Icelandair | ||
27 Dec - 01 Jan | Air Canada | ||
26 Dec - 04 Jan | Frontier Airlines |
Also check the deals for one-way flights from Seattle 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.