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

Return flights

03 Dec - 10 Dec	United
08 Dec - 15 Dec	Air France
23 Dec - 17 Jan	British Airways
21 Dec - 10 Jan	Air Canada
13 Dec - 20 Dec	United
20 Dec - 09 Jan	Air Canada
20 Dec - 10 Jan	Air Canada
23 Dec - 30 Dec	KLM
18 Dec - 25 Dec	Air France
28 Dec - 04 Jan	United

Also check the deals for one-way flights from St. Louis 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 St. Louis to Paris in December from $650

Return flights