AirHint found the following cheapest return flights from Philadelphia (PHL) to Zurich (ZRH) in December 2025 (see full year).

Return flights

29 Dec - 16 Jan	United
24 Dec - 17 Jan	British Airways
15 Dec - 18 Jan	Frontier Airlines
20 Dec - 11 Jan	Frontier Airlines
20 Dec - 10 Jan	Frontier Airlines
25 Dec - 31 Dec	Air Canada
11 Dec - 18 Dec	Spirit Airlines
25 Dec - 29 Dec	Frontier Airlines
24 Dec - 29 Dec	Spirit Airlines
10 Dec - 15 Dec	American Airlines
11 Dec - 18 Dec	American Airlines	direct
10 Dec - 15 Dec	American Airlines	direct
25 Dec - 31 Dec	American Airlines	direct
25 Dec - 29 Dec	American Airlines	direct
24 Dec - 29 Dec	American Airlines	direct

Also check the deals for one-way flights from Philadelphia to Zurich 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 Philadelphia to Zurich in December from $789

Return flights