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

Return flights

29 Dec - 10 Jan	Condor
09 Dec - 15 Dec	Icelandair
26 Dec - 23 Jan	Alaska Airlines
10 Dec - 17 Dec	Aer Lingus
11 Dec - 07 Jan	Frontier Airlines
26 Dec - 13 Jan	Alaska Airlines
12 Dec - 19 Dec	Aer Lingus
14 Dec - 21 Dec	WestJet
28 Dec - 06 Jan	Alaska Airlines
16 Dec - 31 Dec	Hawaiian Airlines
29 Dec - 10 Jan	Delta	direct
25 Dec - 01 Jan	Condor
25 Dec - 04 Jan	Condor
22 Dec - 30 Dec	Condor
25 Dec - 01 Jan	Delta	direct
19 Dec - 23 Dec	Icelandair
10 Dec - 17 Dec	Delta	direct
12 Dec - 19 Dec	Delta	direct
28 Dec - 06 Jan	Delta	direct
14 Dec - 21 Dec	Delta	direct

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 747€

Return flights