Cheapest return flights from Seattle (SEA) to London (STN), December

20 dates in December, from $ 641. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
3 Dec 8 Dec Air Canada
4 Dec 7 Dec Icelandair
8 Dec 16 Dec Icelandair
27 Dec 12 Jan 2027 Icelandair
13 Dec 24 Dec Icelandair
1 Dec 6 Dec Icelandair
27 Dec 10 Jan 2027 Icelandair
11 Dec 23 Dec Frontier Airlines
26 Dec 6 Jan 2027 Lufthansa
14 Dec 7 Jan 2027 Icelandair
12 Dec 19 Dec Air Canada
15 Dec 7 Jan 2027 Icelandair
13 Dec 18 Dec Icelandair
16 Dec 7 Jan 2027 Icelandair
13 Dec 30 Dec Frontier Airlines
25 Dec 30 Dec Icelandair
17 Dec 7 Jan 2027 Alaska Airlines
17 Dec 6 Jan 2027 Alaska Airlines
18 Dec 8 Jan 2027 Alaska Airlines
25 Dec 3 Jan 2027 Icelandair
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Deals for one-way flights from Seattle to London in December.

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About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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