AirHint found the following cheapest return flights from Seattle (SEA) to Paris (CDG) in December 2025 (see full year).

Return flights

05 Dec - 10 Dec	Icelandair
07 Dec - 12 Dec	Icelandair
29 Dec - 24 Jan	Air Canada
28 Dec - 17 Jan	Air France
23 Dec - 17 Jan	Air Canada
26 Dec - 17 Jan	Air Canada
26 Dec - 23 Jan	Air Canada
13 Dec - 18 Jan	Delta
05 Dec - 13 Dec	Delta
12 Dec - 17 Dec	Aer Lingus
30 Dec - 11 Jan	Lufthansa
15 Dec - 22 Dec	Aer Lingus
14 Dec - 21 Dec	Aer Lingus
24 Dec - 17 Jan	Air Canada
11 Dec - 22 Dec	Air France	direct
27 Dec - 10 Jan	Air Canada
11 Dec - 07 Jan	Lufthansa
10 Dec - 30 Dec	WestJet
23 Dec - 30 Dec	Air Canada
12 Dec - 30 Dec	Frontier Airlines

Also check the deals for one-way flights from Seattle to Paris 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 Seattle to Paris in December from $450

Return flights