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

Return flights

04 Dec - 17 Dec	Icelandair
08 Dec - 24 Dec	Lufthansa
10 Dec - 24 Dec	United
09 Dec - 24 Dec	United
30 Dec - 24 Jan	Air France
29 Dec - 24 Jan	Air France
07 Dec - 18 Dec	United
06 Dec - 18 Dec	United
28 Dec - 17 Jan	Air France
24 Dec - 17 Jan	KLM
05 Dec - 13 Dec	Virgin Atlantic
08 Dec - 23 Dec	Air France
29 Dec - 12 Jan	Air France
28 Dec - 12 Jan	Air France
25 Dec - 17 Jan	KLM
28 Dec - 11 Jan	Delta
29 Dec - 11 Jan	Delta
29 Dec - 10 Jan	Virgin Atlantic
12 Dec - 23 Dec	British Airways
10 Dec - 21 Dec	Aer Lingus

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 413€

Return flights