AirHint found the following cheapest return flights from Washington (IAD) to Frankfurt (FRA) in December 2025 (see full year).

Return flights

08 Dec - 15 Dec	TAP
01 Dec - 07 Dec	TAP
01 Dec - 05 Dec	Icelandair
15 Dec - 29 Dec	TAP
29 Dec - 09 Jan	Scandinavian Airlines
04 Dec - 21 Dec	TAP
04 Dec - 22 Dec	TAP
03 Dec - 27 Dec	Turkish Airlines
24 Dec - 17 Jan	Icelandair
29 Dec - 09 Jan	Lufthansa	direct
24 Dec - 10 Jan	British Airways
24 Dec - 07 Jan	Scandinavian Airlines
24 Dec - 17 Jan	United	direct
08 Dec - 15 Dec	United	direct
23 Dec - 10 Jan	SWISS
04 Dec - 21 Dec	Lufthansa	direct
04 Dec - 22 Dec	Lufthansa	direct
23 Dec - 10 Jan	United	direct
24 Dec - 07 Jan	Lufthansa	direct
29 Dec - 05 Jan	Air Canada

Also check the deals for one-way flights from Washington to Frankfurt 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 Washington to Frankfurt in December from 392€

Return flights